diff --git a/xCAT-server/lib/xcat/plugins/AAsn.pm b/xCAT-server/lib/xcat/plugins/AAsn.pm
index 0b52fafa7..4a2c65213 100644
--- a/xCAT-server/lib/xcat/plugins/AAsn.pm
+++ b/xCAT-server/lib/xcat/plugins/AAsn.pm
@@ -6,6 +6,7 @@ use strict;
 use xCAT::Table;
 
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
 
 use xCAT::MsgUtils;
@@ -78,7 +79,7 @@ sub init_plugin
 
     if ((xCAT::Utils->isServiceNode()) && ( -s "/etc/xcat/cfgloc"))
     {
-        my @nodeinfo   = xCAT::Utils->determinehostname;
+        my @nodeinfo   = xCAT::NetworkUtils->determinehostname;
         my $nodename   = pop @nodeinfo;                    # get hostname
         my @nodeipaddr = @nodeinfo;                        # get ip addresses
         my $service;
@@ -106,7 +107,7 @@ sub init_plugin
         # read the service node table
         # for a list of all functions to setup for this service node
         #
-        my @servicelist = xCAT::Utils->isServiceReq($nodename, \@nodeipaddr);
+        my @servicelist = xCAT::ServiceNodeUtils->isServiceReq($nodename, \@nodeipaddr);
         my $service;
         if ($::RUNCMD_RC == 0)
         {
@@ -272,7 +273,7 @@ sub init_plugin
         {
             print "\n"
               ; # make OK prints look better.  Only need to do this for the 1st service.
-            my @tmp = xCAT::Utils->get_site_attribute("vsftp");   
+            my @tmp = xCAT::TableUtils->get_site_attribute("vsftp");   
 		    if ($tmp[0] && ($tmp[0] !~ /0|NO|No|no|N|n/ )) {         
                 $rc = &setup_FTP();    # setup FTP
             }
@@ -318,7 +319,7 @@ sub setupInstallloc
 {
     my ($nodename) = @_;
     my $rc         = 0;
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
     my $installloc;
     my $newinstallloc;
 
@@ -328,7 +329,7 @@ sub setupInstallloc
     my $arch;
     my $nomount = 0;
 
-    my $retdata = xCAT::Utils->readSNInfo($nodename);
+    my $retdata = xCAT::ServiceNodeUtils->readSNInfo($nodename);
     if (ref $retdata and $retdata->{'arch'})
     {    # no error
         $master = $retdata->{'master'};    # management node
@@ -337,7 +338,7 @@ sub setupInstallloc
 
         # read install directory and install location from database,
         # if they exists
-        my @installlocation = xCAT::Utils->get_site_attribute("installloc");
+        my @installlocation = xCAT::TableUtils->get_site_attribute("installloc");
         my $hostname;
         my $path;
         if ($installlocation[0])
@@ -416,7 +417,7 @@ sub setupInstallloc
 
                 # need to  mount the directory
                 my $cmd;
-                my @nfsv4 = xCAT::Utils->get_site_attribute("useNFSv4onAIX");
+                my @nfsv4 = xCAT::TableUtils->get_site_attribute("useNFSv4onAIX");
                 if ($nfsv4[0] && ($nfsv4[0] =~ /1|Yes|yes|YES|Y|y/))
                 {
                     $cmd = "mount -o vers=4,rw,nolock $master:$installloc $installdir";
@@ -575,7 +576,7 @@ sub setup_CONS
     my $os;
     my $arch;
     my $cmd;
-    my $retdata = xCAT::Utils->readSNInfo($nodename);
+    my $retdata = xCAT::ServiceNodeUtils->readSNInfo($nodename);
     if ($retdata->{'arch'})
     {    # no error
         $master = $retdata->{'master'};
@@ -648,7 +649,7 @@ sub setup_DHCP
     #        $snonly=$href->{value};
     #    }
     #}
-    my @hs = xCAT::Utils->get_site_attribute("disjointdhcps");
+    my @hs = xCAT::TableUtils->get_site_attribute("disjointdhcps");
     my $tmp = $hs[0];
     if(defined($tmp)) {
         $snonly = $tmp;
@@ -695,8 +696,8 @@ sub setup_DHCP
      # determine my name
      # get servicenodes and their nodes
      # find the list of nodes serviced
-     my @hostinfo=xCAT::Utils->determinehostname();
-     my $sn_hash =xCAT::Utils->getSNandNodes();
+     my @hostinfo=xCAT::NetworkUtils->determinehostname();
+     my $sn_hash =xCAT::ServiceNodeUtils->getSNandNodes();
      my @nodes;
      my %iphash=();
      my $snkey;
@@ -749,7 +750,7 @@ sub setup_FTP
     # change ftp user id home directory to installdir
     # link installdir
     # restart the daemon
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
     if (!(-e $installdir))         # make it
     {
         mkpath($installdir);
@@ -924,7 +925,7 @@ sub setup_NTPsn
     my $ntpcfg = "/etc/ntp.conf";
 
     # read DB for nodeinfo
-    my $retdata = xCAT::Utils->readSNInfo($nodename);
+    my $retdata = xCAT::ServiceNodeUtils->readSNInfo($nodename);
     $master = $retdata->{'master'};
     $os     = $retdata->{'os'};
     $arch   = $retdata->{'arch'};
@@ -970,7 +971,7 @@ sub setup_NTPmn
     my $ntpcfg = "/etc/ntp.conf";
 
     # get timeservers from site table
-    my @ntpservers = xCAT::Utils->get_site_attribute("ntpservers");
+    my @ntpservers = xCAT::TableUtils->get_site_attribute("ntpservers");
     if ($ntpservers[0])
     {
 
@@ -1164,7 +1165,7 @@ sub setup_TFTP
     }
 
     # read DB for nodeinfo
-    my $retdata = xCAT::Utils->readSNInfo($nodename);
+    my $retdata = xCAT::ServiceNodeUtils->readSNInfo($nodename);
     $master = $retdata->{'master'};
     $os     = $retdata->{'os'};
     $arch   = $retdata->{'arch'};
@@ -1187,7 +1188,7 @@ sub setup_TFTP
          # read sharedtftp attribute from site table, if exist
     #my $stab = xCAT::Table->new('site');
     #my $sharedtftp = $stab->getAttribs({key => 'sharedtftp'}, 'value');
-    my @ss = xCAT::Utils->get_site_attribute("sharedtftp");
+    my @ss = xCAT::TableUtils->get_site_attribute("sharedtftp");
     my $sharedtftp = $ss[0];
     if ( defined($sharedtftp) )
     {
@@ -1212,7 +1213,7 @@ sub setup_TFTP
     #$stab->close;
 
     # read tftpdir directory from database
-    $tftpdir = xCAT::Utils->getTftpDir();
+    $tftpdir = xCAT::TableUtils->getTftpDir();
     if (!(-e $tftpdir))
     {
         mkdir($tftpdir);
@@ -1229,7 +1230,7 @@ sub setup_TFTP
 
             # need to  mount the directory
             my $cmd;
-            my @nfsv4 = xCAT::Utils->get_site_attribute("useNFSv4onAIX");
+            my @nfsv4 = xCAT::TableUtils->get_site_attribute("useNFSv4onAIX");
             if ($nfsv4[0] && ($nfsv4[0] =~ /1|Yes|yes|YES|Y|y/))
             {
                 $cmd = " mount -o vers=4,rw,nolock $tftphost:$tftpdir $tftpdir";
@@ -1380,7 +1381,7 @@ sub enable_TFTPhpa
   }
 
   # read tftpdir directory from database
-  my $tftpdir = xCAT::Utils->getTftpDir();
+  my $tftpdir = xCAT::TableUtils->getTftpDir();
   if (!(-e $tftpdir)) {
     mkdir($tftpdir);
   }
diff --git a/xCAT-server/lib/xcat/plugins/FIP.pm b/xCAT-server/lib/xcat/plugins/FIP.pm
index cf41ad33b..144de0c9c 100644
--- a/xCAT-server/lib/xcat/plugins/FIP.pm
+++ b/xCAT-server/lib/xcat/plugins/FIP.pm
@@ -14,7 +14,9 @@ use Data::Dumper;
 use Getopt::Long;
 use xCAT::MsgUtils;
 use strict;
-
+use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 # options can be bundled up like -vV
 Getopt::Long::Configure("bundling");
 $Getopt::Long::ignorecase = 0;
@@ -109,7 +111,7 @@ sub preprocess_request {
         # build an individual request for each service node
         my $service  = "xcat";
         my @hcps=[$current_ppc_ent->{'hcp'}];
-        my $sn = xCAT::Utils->get_ServiceNode(\@hcps, $service, "MN");
+        my $sn = xCAT::ServiceNodeUtils->get_ServiceNode(\@hcps, $service, "MN");
         #print Dumper($sn);
         if( keys(%$sn) == 0 )     {
             my $reqcopy = {%$req};
diff --git a/xCAT-server/lib/xcat/plugins/activedirectory.pm b/xCAT-server/lib/xcat/plugins/activedirectory.pm
index 839064fd9..cb06a5166 100644
--- a/xCAT-server/lib/xcat/plugins/activedirectory.pm
+++ b/xCAT-server/lib/xcat/plugins/activedirectory.pm
@@ -10,6 +10,7 @@ use Getopt::Long;
 use xCAT::ADUtils;
 use Net::DNS;
 use xCAT::SvrUtils;
+use xCAT::TableUtils;
 use strict;
 
 sub handled_commands { 
@@ -34,7 +35,7 @@ sub process_request {
     #my $sitetab = xCAT::Table->new('site');
     my $domain;
     #$domain = $sitetab->getAttribs({key=>'domain'},['value']);
-    my @domains = xCAT::Utils->get_site_attribute("domain");
+    my @domains = xCAT::TableUtils->get_site_attribute("domain");
     my $tmp = $domains[0];
     if (defined($tmp)) { 
         $domain = $tmp;
@@ -44,7 +45,7 @@ sub process_request {
     #TODO: if multi-domain support implemented, use the domains table to reference between realm and domain  
     #my $server = $sitetab->getAttribs({key=>'directoryserver'},['value']);
     #my $realm = $sitetab->getAttribs({key=>'realm'},['value']);
-    my @directoryservers =  xCAT::Utils->get_site_attribute("directoryserver");
+    my @directoryservers =  xCAT::TableUtils->get_site_attribute("directoryserver");
     my @realms = xCAT::Utils->get_site_attribute("realm");
     my $tmp1 = $realms[0];
     my $server;
diff --git a/xCAT-server/lib/xcat/plugins/aixinstall.pm b/xCAT-server/lib/xcat/plugins/aixinstall.pm
index 5fddac8d0..96cb9c906 100644
--- a/xCAT-server/lib/xcat/plugins/aixinstall.pm
+++ b/xCAT-server/lib/xcat/plugins/aixinstall.pm
@@ -21,7 +21,9 @@ use xCAT::NodeRange;
 use xCAT::Schema;
 use xCAT::Utils;
 use xCAT::SvrUtils;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::InstUtils;
 use xCAT::DBobjUtils;
 use XML::Simple;
@@ -162,7 +164,7 @@ sub preprocess_request
 
     #my $sitetab = xCAT::Table->new('site');
     #my $nfsv4entry = $sitetab->getAttribs({'key' => 'useNFSv4onAIX'}, 'value');
-    my @tmp = xCAT::Utils->get_site_attribute("useNFSv4onAIX");
+    my @tmp = xCAT::TableUtils->get_site_attribute("useNFSv4onAIX");
     my $nfsv4entry = $tmp[0];
     if( defined ($nfsv4entry) )
     {
@@ -288,7 +290,7 @@ sub preprocess_request
 		if (scalar(@{$mynodes})) {
         	# set up the requests to go to the service nodes
 			my $snodes;
-			$snodes = xCAT::Utils->getSNformattedhash($mynodes, $service, "MN", $type);
+			$snodes = xCAT::ServiceNodeUtils->getSNformattedhash($mynodes, $service, "MN", $type);
 
         	foreach my $snkey (keys %$snodes)
         	{
@@ -366,7 +368,7 @@ sub preprocess_request
 		my $sn;
 		if ($nodes)
 		{
-			$sn = xCAT::Utils->getSNformattedhash($nodes, $service, "MN");
+			$sn = xCAT::ServiceNodeUtils->getSNformattedhash($nodes, $service, "MN");
 		}
 
         # set up the requests to go to the service nodes
@@ -410,7 +412,7 @@ sub preprocess_request
             # set up the requests to go to the service nodes
             #   all get the same request
 			my $snodes;
-			$snodes = xCAT::Utils->getSNformattedhash($mynodes, $service, "MN", $type);
+			$snodes = xCAT::ServiceNodeUtils->getSNformattedhash($mynodes, $service, "MN", $type);
 			foreach my $snkey (keys %$snodes)
             {
                 my $reqcopy = {%$req};
@@ -511,7 +513,7 @@ sub process_request
     #my $nfsv4entry = $sitetab->getAttribs({'key' => 'useNFSv4onAIX'}, 'value');
     #if($nfsv4entry and defined ($nfsv4entry->{'value'}))
     #{
-    my @nfsv4entries = xCAT::Utils->get_site_attribute("useNFSv4onAIX");
+    my @nfsv4entries = xCAT::TableUtils->get_site_attribute("useNFSv4onAIX");
     my $tmp = $nfsv4entries[0];
     if ( defined($tmp) && $tmp =~ /1|Yes|yes|YES|Y|y/)
     { 
@@ -1468,7 +1470,7 @@ sub spot_updates
     if ($::UPDATE)
     {
         # get list of SNs
-        @allservers = xCAT::Utils->getAllSN();
+        @allservers = xCAT::ServiceNodeUtils->getAllSN();
 
         # we don't want to include the nimprime in the list of SNs
         #  need to compare IPs of nimprime and SN
@@ -1702,8 +1704,8 @@ sub spot_updates
 		#  don't remove spots if SNs are using shared file system
 		#   mkdsklsnode will take care of copying out the updated spot
 		# check the sharedinstall attr
-		#my $sharedinstall=xCAT::Utils->get_site_attribute('sharedinstall');
-		my @sharedinstalls=xCAT::Utils->get_site_attribute('sharedinstall');
+		#my $sharedinstall=xCAT::TableUtils->get_site_attribute('sharedinstall');
+		my @sharedinstalls=xCAT::TableUtils->get_site_attribute('sharedinstall');
 		my $sharedinstall = $sharedinstalls[0];
 		chomp $sharedinstall;
 
@@ -2260,7 +2262,7 @@ sub mknimimage
     my $lpp_source_name;
     my $root_name;
     my $dump_name;
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
     if (defined(@{$::args}))
     {
@@ -2486,7 +2488,7 @@ sub mknimimage
             #my ($tmp) = $sitetab->getAttribs({'key' => 'domain'}, 'value');
             #my $domain = $tmp->{value};
             #$sitetab->close;
-            my @domains = xCAT::Utils->get_site_attribute("domain");
+            my @domains = xCAT::TableUtils->get_site_attribute("domain");
             my $domain = $domains[0];
             if (!$domain)
             {
@@ -2780,7 +2782,7 @@ sub mknimimage
         #my ($tmp) = $sitetab->getAttribs({'key' => 'domain'}, 'value');
         #my $domain = $tmp->{value};
         #$sitetab->close;
-        my @domains = xCAT::Utils->get_site_attribute("domain");
+        my @domains = xCAT::TableUtils->get_site_attribute("domain");
         my $domain = $domains[0];
         if (!$domain)
         {
@@ -3723,7 +3725,7 @@ sub mk_lpp_source
 
     my @lppresources;
     my $lppsrcname;
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
     #
     #  Get a list of the defined lpp_source resources
@@ -4118,7 +4120,7 @@ sub mk_spot
 
     my $spot_name;
     my $currentimage;
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
     if ($::attrres{spot})
     {
@@ -4373,7 +4375,7 @@ sub mk_bosinst_data
     my $bosinst_data_name = $::image_name . "_bosinst_data";
 
 	my @validattrs = ("verbose", "nfs_vers", "nfs_sec", "dest_dir", "group", "source");
-	my $install_dir = xCAT::Utils->getInstallDir();
+	my $install_dir = xCAT::TableUtils->getInstallDir();
 
     if ($attrres{bosinst_data})
     {
@@ -4532,10 +4534,10 @@ sub mk_resolv_conf_file
     #my $sitetab = xCAT::Table->new('site');
     #my ($tmp) = $sitetab->getAttribs({'key' => 'domain'}, 'value');
     #my $domain = $tmp->{value};
-    my @domains = xCAT::Utils->get_site_attribute("domain");
+    my @domains = xCAT::TableUtils->get_site_attribute("domain");
     my $domain = $domains[0];
     #my ($tmp2) = $sitetab->getAttribs({'key' => 'nameservers'}, 'value');
-    my @nameserver = xCAT::Utils->get_site_attribute("nameservers");
+    my @nameserver = xCAT::TableUtils->get_site_attribute("nameservers");
     my $tmp2 = $nameserver[0];
 
     # convert <xcatmaster> to nameserver IP
@@ -4694,13 +4696,13 @@ sub chk_resolv_conf
 	#my $sitetab = xCAT::Table->new('site');
 	#my ($tmp) = $sitetab->getAttribs({'key' => 'domain'}, 'value');
     #my $site_domain = $tmp->{value};
-    my @domains = xCAT::Utils->get_site_attribute("domain");
+    my @domains = xCAT::TableUtils->get_site_attribute("domain");
     my $site_domain = $domains[0];
 
 	#my ($tmp2) = $sitetab->getAttribs({'key' => 'nameservers'}, 'value');
     #my $site_nameservers = $tmp2->{value};
     #$sitetab->close;
-    my @nameserver = xCAT::Utils->get_site_attribute("nameservers");
+    my @nameserver = xCAT::TableUtils->get_site_attribute("nameservers");
     my $site_nameservers = $nameserver[0];
 
 	#  Get a list of the all NIM resources
@@ -4937,7 +4939,7 @@ sub chk_resolv_conf
             my $loc;
 			my @validattrs = ("nfs_vers", "nfs_sec");
 
-   			my $install_dir = xCAT::Utils->getInstallDir();
+   			my $install_dir = xCAT::TableUtils->getInstallDir();
             if ($::opt_l)
             {
 				if ($::opt_l =~ /\/$/)
@@ -5138,7 +5140,7 @@ sub mk_resolv_conf
 	my @validattrs = ("verbose", "nfs_vers", "nfs_sec", "dest_dir", "group", "source");
 
     my $resolv_conf_name = $::image_name . "_resolv_conf";
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
     if ($attrres{resolv_conf})
     {
@@ -5165,10 +5167,10 @@ sub mk_resolv_conf
         #my $sitetab = xCAT::Table->new('site');
         #my ($tmp) = $sitetab->getAttribs({'key' => 'domain'}, 'value');
         #my $domain = $tmp->{value};
-        my @domains = xCAT::Utils->get_site_attribute("domain");
+        my @domains = xCAT::TableUtils->get_site_attribute("domain");
         my $domain = $domains[0];
         #my ($tmp2) = $sitetab->getAttribs({'key' => 'nameservers'}, 'value');
-        my @nameserver = xCAT::Utils->get_site_attribute("nameservers");
+        my @nameserver = xCAT::TableUtils->get_site_attribute("nameservers");
         my $tmp2 = $nameserver[0];
         # convert <xcatmaster> to nameserver IP
         my $nameservers;
@@ -5299,7 +5301,7 @@ sub mk_mksysb
 	my @validattrs = ("verbose", "nfs_vers", "nfs_sec", "dest_dir", "group", "source", "size_preview", "exclude_files", "mksysb_flags", "mk_image");
 
     my $mksysb_name = $::image_name . "_mksysb";
-	my $install_dir = xCAT::Utils->getInstallDir();
+	my $install_dir = xCAT::TableUtils->getInstallDir();
 	
     if ($attrres{mksysb})
     {
@@ -5630,12 +5632,12 @@ sub prermnimimage
 
     # by default, get MN and all servers
     my @allsn = ();
-    my @nlist = xCAT::Utils->list_all_nodes;
+    my @nlist = xCAT::TableUtils->list_all_nodes;
     my $sn;
     my $service = "xcat";
     if (\@nlist)
     {
-        $sn = xCAT::Utils->getSNformattedhash(\@nlist, $service, "MN");
+        $sn = xCAT::ServiceNodeUtils->getSNformattedhash(\@nlist, $service, "MN");
     }
     foreach my $snkey (keys %$sn)
     {
@@ -6522,7 +6524,7 @@ sub mkdumpres
 	my @validattrs = ("dumpsize", "max_dumps", "notify", "snapcollect", "verbose", "nfs_vers", "group");
 
     my $cmd = "/usr/sbin/nim -Fo define -t $type -a server=master ";
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
 	my %cmdattrs;
 
@@ -6625,7 +6627,7 @@ sub mknimres
 	@validattrs = ("nfs_vers", "verbose", "group");
 
     my $cmd = "/usr/sbin/nim -Fo define -t $type -a server=master ";
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
 	my %cmdattrs;
     if ($::NFSv4)
@@ -6858,7 +6860,7 @@ sub updatespot
     }
 
     # copy the script
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
     my $cpcmd =
       "mkdir -m 644 -p $spot_loc/lpp/bos/inst_root/opt/xcat; cp $install_dir/postscripts/xcataixpost $spot_loc/lpp/bos/inst_root/opt/xcat/xcataixpost; chmod +x $spot_loc/lpp/bos/inst_root/opt/xcat/xcataixpost";
 
@@ -7336,7 +7338,7 @@ sub prenimnodecust
     #
     #  Get the service nodes for this list of nodes
     #
-    my $sn = xCAT::Utils->getSNformattedhash(\@nodelist, "xcat", "MN");
+    my $sn = xCAT::ServiceNodeUtils->getSNformattedhash(\@nodelist, "xcat", "MN");
     if ($::ERROR_RC)
     {
         my $rsp;
@@ -7820,7 +7822,7 @@ sub prenimnodeset
     #my ($tmp) = $sitetab->getAttribs({'key' => 'sharedinstall'}, 'value');
     #my $sharedinstall = $tmp->{value};
     #$sitetab->close;
-    my @sharedinstalls = xCAT::Utils->get_site_attribute("sharedinstall");
+    my @sharedinstalls = xCAT::TableUtils->get_site_attribute("sharedinstall");
     my $sharedinstall = $sharedinstalls[0];
     if (!$sharedinstall) {
         $sharedinstall="no";
@@ -8063,7 +8065,7 @@ sub prenimnodeset
     {    # if we have at least one standalone node
 
         my $createscript = 0;
-        my $install_dir = xCAT::Utils->getInstallDir();
+        my $install_dir = xCAT::TableUtils->getInstallDir();
 
         # see if it already exists
 
@@ -8368,7 +8370,7 @@ sub prenimnodeset
     #   make sure the permission are correct for using and transferring
     #   to the nodes and service nodes.
     #   Also removes /install/postscripts/etc/xcat/cfgloc if found
-    my $result = xCAT::Utils->checkCredFiles($callback);
+    my $result = xCAT::TableUtils->checkCredFiles($callback);
 
     #####################################################
     #
@@ -9028,14 +9030,14 @@ sub doSNcopy2
     my @nodelist    = @$nodes;
     my @nimrestypes = @$restypes;
     my %nodeosi     = %{$nosi};
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
 	my %resinfo;
 
     #
     #  Get a list of nodes for each service node
     #
-    my $sn = xCAT::Utils->getSNformattedhash(\@nodelist, "xcat", "MN", $type);
+    my $sn = xCAT::ServiceNodeUtils->getSNformattedhash(\@nodelist, "xcat", "MN", $type);
     if ($::ERROR_RC)
     {
         my $rsp;
@@ -9219,7 +9221,7 @@ sub doSFScopy
     my @nodelist    = @$nodes;
     my @nimrestypes = @$restypes;
     my %nodeosi     = %{$nosi};  # osimage name for each node
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
 	my $error;
 
@@ -9239,7 +9241,7 @@ sub doSFScopy
 	my @SNlist;
 
 	#  Get a list of nodes for each service node
-    my $sn = xCAT::Utils->getSNformattedhash(\@nodelist, "xcat", "MN", $type);
+    my $sn = xCAT::ServiceNodeUtils->getSNformattedhash(\@nodelist, "xcat", "MN", $type);
     if ($::ERROR_RC)
     {
         my $rsp;
@@ -9335,12 +9337,12 @@ sub doSFScopy
 
 	# by default, get MN and all servers
     my @allsn = ();
-    my @nlist = xCAT::Utils->list_all_nodes;
+    my @nlist = xCAT::TableUtils->list_all_nodes;
     my $snode;
     my $service = "xcat";
     if (\@nlist)
     {
-		$snode = xCAT::Utils->getSNformattedhash(\@nlist, $service, "MN");
+		$snode = xCAT::ServiceNodeUtils->getSNformattedhash(\@nlist, $service, "MN");
     }
     foreach my $sn (keys %$snode) {
 		foreach my $img (@imagenames) {
@@ -9642,7 +9644,7 @@ sub mkdsklsnode
     #my ($tmp) = $sitetab->getAttribs({'key' => 'sharedinstall'}, 'value');
     #my $sharedinstall = $tmp->{value};
     #$sitetab->close;
-    my @sharedinstalls = xCAT::Utils->get_site_attribute("sharedinstall");
+    my @sharedinstalls = xCAT::TableUtils->get_site_attribute("sharedinstall");
     my $sharedinstall = $sharedinstalls[0];
     if (!$sharedinstall) {
         $sharedinstall="no";
@@ -10246,7 +10248,7 @@ sub mkdsklsnode
 				#my ($tmp) = $sitetab->getAttribs({'key' => 'sharedinstall'}, 'value');
 				#my $sharedinstall = $tmp->{value};
 				#$sitetab->close;
-                                my @sharedinstalls = xCAT::Utils->get_site_attribute("sharedinstall");
+                                my @sharedinstalls = xCAT::TableUtils->get_site_attribute("sharedinstall");
                                 my $sharedinstall = $sharedinstalls[0];
 				if (!$sharedinstall) {
 					$sharedinstall="no";
@@ -10317,7 +10319,7 @@ sub mkdsklsnode
                 next;
             }
                         
-            my $tftpdir = xCAT::Utils->getTftpDir();
+            my $tftpdir = xCAT::TableUtils->getTftpDir();
             my $niminfoloc = "$tftpdir/${nodeip}.info";
 
             my $cmd = "cat $niminfoloc | grep 'BASECUST_REMOVAL'";
@@ -10671,7 +10673,7 @@ sub mkdsklsnode
                             	xCAT::MsgUtils->message("E", $rsp, $callback);
                             	next;
                         	}
-                        	my $tftpdir = xCAT::Utils->getTftpDir();
+                        	my $tftpdir = xCAT::TableUtils->getTftpDir();
                         	my $niminfofile = "$tftpdir/${nodeip}.info";
                         	#Update /tftpboot/<node>.info file
                         	my $fscontent;
@@ -10965,7 +10967,7 @@ sub mkdsklsnode
             xCAT::MsgUtils->message("E", $rsp, $callback);
         }
         my $xcatmasterip = xCAT::NetworkUtils->getipaddr((keys %xcatmasterhash)[0]);
-        my @allips = xCAT::Utils->gethost_ips();
+        my @allips = xCAT::NetworkUtils->gethost_ips();
 
         my $snlocal;
         my $snremote;
@@ -11015,7 +11017,7 @@ sub mkdsklsnode
                       {
                             my $ip = $1;
                             my $netmask = $2;
-                            if(xCAT::Utils::isInSameSubnet($xcatmasterip, $ip, $netmask, 2))
+                            if(xCAT::NetworkUtils::isInSameSubnet($xcatmasterip, $ip, $netmask, 2))
                             {
                                 $localip = $ip;
                                 last;
@@ -11053,7 +11055,7 @@ sub mkdsklsnode
                       {
                             my $ip = $1;
                             my $netmask = $2;
-                            if(xCAT::Utils::isInSameSubnet($xcatmasterip, $ip, $netmask, 2))
+                            if(xCAT::NetworkUtils::isInSameSubnet($xcatmasterip, $ip, $netmask, 2))
                             {
                                 $remoteip = $ip;
                                 last;
@@ -11071,7 +11073,7 @@ sub mkdsklsnode
                 $remoteip = xCAT::NetworkUtils->getipaddr($snremote);
               }
 
-                my $install_dir = xCAT::Utils->getInstallDir();
+                my $install_dir = xCAT::TableUtils->getInstallDir();
                 my $scmd = "lsnfsexp -c";
                 my @output = xCAT::Utils->runcmd("$scmd", -1);
                 if ($::RUNCMD_RC != 0)
@@ -11622,7 +11624,7 @@ sub make_SN_resource
         #my ($tmp) = $sitetab->getAttribs({'key' => 'domain'}, 'value');
         #my $domain = $tmp->{value};
         #$sitetab->close;
-        my @domains = xCAT::Utils->get_site_attribute("domain");
+        my @domains = xCAT::TableUtils->get_site_attribute("domain");
         my $domain = $domains[0];
         if (!$domain)
         {
diff --git a/xCAT-server/lib/xcat/plugins/anaconda.pm b/xCAT-server/lib/xcat/plugins/anaconda.pm
index bb8783aa5..da009473a 100644
--- a/xCAT-server/lib/xcat/plugins/anaconda.pm
+++ b/xCAT-server/lib/xcat/plugins/anaconda.pm
@@ -11,6 +11,7 @@ use Thread qw(yield);
 use POSIX qw(WNOHANG nice);
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
 use xCAT::MsgUtils;
 use xCAT::SvrUtils;
@@ -57,7 +58,7 @@ sub preprocess_request
     #my $stab = xCAT::Table->new('site');
     #my $sent;
     #($sent) = $stab->getAttribs({key => 'sharedtftp'}, 'value');
-    my @ents = xCAT::Utils->get_site_attribute("sharedtftp");
+    my @ents = xCAT::TableUtils->get_site_attribute("sharedtftp");
     my $site_ent = $ents[0];
     unless (  defined($site_ent)
             and ($site_ent =~ /no/i or $site_ent =~ /0/))
@@ -178,21 +179,21 @@ sub mknetboot
     #if ($sitetab)
     #{
     #    (my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
-    my @ents = xCAT::Utils->get_site_attribute("installdir");
+    my @ents = xCAT::TableUtils->get_site_attribute("installdir");
     my $site_ent = $ents[0];
     if ( defined($site_ent) )
     {
         $installroot = $site_ent;
     }
     #    ($ref) = $sitetab->getAttribs({key => 'xcatdport'}, 'value');
-    @ents = xCAT::Utils->get_site_attribute("xcatdport");
+    @ents = xCAT::TableUtils->get_site_attribute("xcatdport");
     $site_ent = $ents[0];
     if ( defined($site_ent) )
     {
         $xcatdport = $site_ent;
     }
     #    ($ref) = $sitetab->getAttribs({key => 'tftpdir'}, 'value');
-    @ents = xCAT::Utils->get_site_attribute("tftpdir");
+    @ents = xCAT::TableUtils->get_site_attribute("tftpdir");
     $site_ent = $ents[0];
     if ( defined($site_ent) )
     {
@@ -582,7 +583,7 @@ sub mknetboot
 		    $kcmdline .= $statemnt ." ";
                     my $xcatmasterip;
                     # if xcatmaster is hostname, convert it to ip address
-                    if (xCAT::Utils->validate_ip($xcatmaster)) {
+                    if (xCAT::NetworkUtils->validate_ip($xcatmaster)) {
                         # Using XCAT=<hostname> will cause problems rc.statelite.ppc.redhat
                         # when trying to run chroot command
                         $xcatmasterip = xCAT::NetworkUtils->getipaddr($xcatmaster);
@@ -795,7 +796,7 @@ sub mknetboot
         );
     }
 
-    #my $rc = xCAT::Utils->create_postscripts_tar();
+    #my $rc = xCAT::TableUtils->create_postscripts_tar();
     #if ( $rc != 0 ) {
     #	xCAT::MsgUtils->message( "S", "Error creating postscripts tar file." );
     #}
@@ -820,14 +821,14 @@ sub mkinstall
     #if ($sitetab)
     #{
     #    (my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
-    my @ents = xCAT::Utils->get_site_attribute("installdir");
+    my @ents = xCAT::TableUtils->get_site_attribute("installdir");
     my $site_ent = $ents[0];
     if( defined($site_ent) )    
     {
         $installroot = $site_ent;
     }
     #( $ref) = $sitetab->getAttribs({key => 'tftpdir'}, 'value');
-    @ents = xCAT::Utils->get_site_attribute("tftpdir");
+    @ents = xCAT::TableUtils->get_site_attribute("tftpdir");
     $site_ent = $ents[0];
     if( defined($site_ent) )    
     {
@@ -1298,7 +1299,7 @@ sub mkinstall
                     );
         }
     }
-    #my $rc = xCAT::Utils->create_postscripts_tar();
+    #my $rc = xCAT::TableUtils->create_postscripts_tar();
     #if ($rc != 0)
     #{
     #    xCAT::MsgUtils->message("S", "Error creating postscripts tar file.");
@@ -1319,7 +1320,7 @@ sub copycd
     #if ($sitetab)
     #{
     #    (my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
-    my @ents = xCAT::Utils->get_site_attribute("installdir");
+    my @ents = xCAT::TableUtils->get_site_attribute("installdir");
     my $site_ent = $ents[0];
     if( defined($site_ent) )    
     {
@@ -1662,7 +1663,7 @@ sub insert_dd {
     my $driverupdatesrc = shift;
     my $drivers = shift;
 
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
     my $cmd;
        
diff --git a/xCAT-server/lib/xcat/plugins/blade.pm b/xCAT-server/lib/xcat/plugins/blade.pm
index e6fbcecd7..31c0ce97e 100644
--- a/xCAT-server/lib/xcat/plugins/blade.pm
+++ b/xCAT-server/lib/xcat/plugins/blade.pm
@@ -16,7 +16,9 @@ use lib "$::XCATROOT/lib/perl";
 use xCAT::Table;
 use Thread qw(yield);
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::Usage;
 use IO::Socket;
 use IO::Pty; #needed for ssh password login
@@ -3743,7 +3745,7 @@ sub preprocess_request {
   # build an individual request for each service node
   my $service  = "xcat";
   my @mms=keys(%mpa_hash);
-  my $sn = xCAT::Utils->get_ServiceNode(\@mms, $service, "MN");
+  my $sn = xCAT::ServiceNodeUtils->get_ServiceNode(\@mms, $service, "MN");
 
   # build each request for each service node
   foreach my $snkey (keys %$sn)
@@ -3968,7 +3970,7 @@ sub process_request {
   my $mpatab = xCAT::Table->new('mpa');
   my $mptab = xCAT::Table->new('mp');
   my $tmp;
-  my @entries =  xCAT::Utils->get_site_attribute("blademaxp");
+  my @entries =  xCAT::TableUtils->get_site_attribute("blademaxp");
   my $site_entry = $entries[0];
   if(defined($site_entry)) {
       $blademaxp = $site_entry;
@@ -4693,7 +4695,7 @@ sub network {
         my $result; 
 
         if ($gate) {
-          $result = xCAT::Utils::toIP($gate);
+          $result = xCAT::NetworkUtils::toIP($gate);
           if (@$result[0] == 0) {
             $gateway = @$result[1];
           }
@@ -4726,7 +4728,7 @@ sub network {
         my $result;
 
         if ($gate) {
-          $result = xCAT::Utils::toIP($gate);
+          $result = xCAT::NetworkUtils::toIP($gate);
           if (@$result[0] == 0) {
             $gateway = @$result[1];
           }
@@ -5323,7 +5325,7 @@ sub dompa {
   my @allerrornodes=();
   my $check=0;
   my $global_check=1;
-  my @entries =  xCAT::Utils->get_site_attribute("nodestatus");
+  my @entries =  xCAT::TableUtils->get_site_attribute("nodestatus");
   my $site_entry = $entries[0];
   if(defined($site_entry)) {
       if ($site_entry =~ /0|n|N/) { $global_check=0; }
diff --git a/xCAT-server/lib/xcat/plugins/bmcconfig.pm b/xCAT-server/lib/xcat/plugins/bmcconfig.pm
index 43207d3e1..21d67432c 100644
--- a/xCAT-server/lib/xcat/plugins/bmcconfig.pm
+++ b/xCAT-server/lib/xcat/plugins/bmcconfig.pm
@@ -4,6 +4,7 @@ use Data::Dumper;
 use xCAT::Table;
 use xCAT::MsgUtils;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use IO::Select;
 use Socket;
 
@@ -46,7 +47,7 @@ sub net_parms {
     $net =~ /([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/ or next; #next if ipv6, TODO: IPv6 support
     my $netnum = ($1<<24)+($2<<16)+($3<<8)+$4;
     if ($gw eq '<xcatmaster>') {
-	$gw=xCAT::Utils->my_ip_facing($ip);
+	$gw=xCAT::NetworkUtils->my_ip_facing($ip);
     }
     if (($ipnum & $masknum)==$netnum) {
       return ($ip,$mask,$gw);
@@ -110,7 +111,7 @@ sub process_request  {
     $password=$tmphash->{password};
   }
   #$tmphash=($sitetable->getAttribs({key=>'genpasswords'},'value'))[0];
-  my @entries =  xCAT::Utils->get_site_attribute("genpasswords");
+  my @entries =  xCAT::TableUtils->get_site_attribute("genpasswords");
   my $site_entry = $entries[0];
   if ($site_entry eq "1" or $site_entry  =~ /y(es)?/i) {
     $password = genpassword(10)."1cA!";
diff --git a/xCAT-server/lib/xcat/plugins/boottarget.pm b/xCAT-server/lib/xcat/plugins/boottarget.pm
index 0748adcfc..affab76c5 100644
--- a/xCAT-server/lib/xcat/plugins/boottarget.pm
+++ b/xCAT-server/lib/xcat/plugins/boottarget.pm
@@ -11,6 +11,7 @@ use Thread qw(yield);
 use POSIX qw(WNOHANG nice);
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::MsgUtils;
 use xCAT::Template;
 #use xCAT::Postage;
@@ -46,7 +47,7 @@ sub preprocess_request
     #my $stab = xCAT::Table->new('site');
     #my $sent;
     #($sent) = $stab->getAttribs({key => 'sharedtftp'}, 'value');
-    my @entries =  xCAT::Utils->get_site_attribute("sharedtftp");
+    my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
     my $site_entry = $entries[0];
     unless (   defined($site_entry)
             and ( $site_entry =~ /no/i or $site_entry =~ /0/))
@@ -116,8 +117,8 @@ sub mknetboot
     my @nodes    = @{$req->{node}};
     my $ostab    = xCAT::Table->new('nodetype');
  
-    my $installroot = xCAT::Utils->getInstallDir();
-    my $tftpdir = xCAT::Utils->getTftpDir();
+    my $installroot = xCAT::TableUtils->getInstallDir();
+    my $tftpdir = xCAT::TableUtils->getTftpDir();
 
     my %donetftp=();
     my %oents = %{$ostab->getNodesAttribs(\@nodes,[qw(os arch profile)])};
diff --git a/xCAT-server/lib/xcat/plugins/conserver.pm b/xCAT-server/lib/xcat/plugins/conserver.pm
index 25ed68403..f4f14ec0f 100644
--- a/xCAT-server/lib/xcat/plugins/conserver.pm
+++ b/xCAT-server/lib/xcat/plugins/conserver.pm
@@ -4,6 +4,7 @@ package xCAT_plugin::conserver;
 use strict;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use Getopt::Long;
 use Sys::Hostname;
 
@@ -55,7 +56,7 @@ sub preprocess_request {
   @ARGV=@exargs;
 
   my $isSN=xCAT::Utils->isServiceNode();
-  my @hostinfo=xCAT::Utils->determinehostname();
+  my @hostinfo=xCAT::NetworkUtils->determinehostname();
   my %iphash=();
   foreach(@hostinfo) { $iphash{$_}=1;}
 
@@ -96,7 +97,7 @@ sub preprocess_request {
   
   
   # get site master
-  my $master=xCAT::Utils->get_site_Master();
+  my $master=xCAT::TableUtils->get_site_Master();
   if (!$master) { $master=hostname(); }
 
   # get conserver for each node
@@ -226,10 +227,10 @@ sub docfheaders {
   #push @$content,"#xCAT BEGIN ACCESS\n";
   push @newheaders,"access * {\n";
   push @newheaders,"  trusted 127.0.0.1;\n";
-  my $master=xCAT::Utils->get_site_Master();
+  my $master=xCAT::TableUtils->get_site_Master();
   push @newheaders, "  trusted $master;\n";
   # trust all the ip addresses configured on this node
-  my @allips = xCAT::Utils->gethost_ips();
+  my @allips = xCAT::NetworkUtils->gethost_ips();
   my @ips = ();
   #remove $xcatmaster and duplicate entries
   foreach my $ip (@allips) {
@@ -260,7 +261,7 @@ sub docfheaders {
   #-- which seems to kill AMMs occasionally
   #my $sitetab  = xCAT::Table->new('site');
   #my $vcon = $sitetab->getAttribs({key => "consoleondemand"}, 'value');
-  my @entries =  xCAT::Utils->get_site_attribute("consoleondemand");
+  my @entries =  xCAT::TableUtils->get_site_attribute("consoleondemand");
   my $site_entry = $entries[0];
   if ( defined($site_entry) and $site_entry eq "yes" ) {
     push @newheaders,"  options ondemand;\n";
@@ -298,7 +299,7 @@ sub makeconservercf {
   docfheaders(\@filecontent);
 
   my $isSN=xCAT::Utils->isServiceNode();
-  my @hostinfo=xCAT::Utils->determinehostname();
+  my @hostinfo=xCAT::NetworkUtils->determinehostname();
   my %iphash=();
   foreach(@hostinfo) {$iphash{$_}=1;}
 
@@ -504,12 +505,12 @@ sub donodeent {
   if (grep(/^$cmeth$/,@cservers)) {
     push @$content," include ".$cfgent->{termserver}.";\n";
     push @$content," port ".$cfgent->{termport}.";\n";
-    if ((!$isSN) && ($cfgent->{conserver}) && xCAT::Utils->thishostisnot($cfgent->{conserver})) { # let the master handle it
+    if ((!$isSN) && ($cfgent->{conserver}) && xCAT::NetworkUtils->thishostisnot($cfgent->{conserver})) { # let the master handle it
       push @$content,"  master ".$cfgent->{conserver}.";\n";
     }
   } else { #a script method...
     push @$content,"  type exec;\n";
-    if ((!$isSN) && ($cfgent->{conserver}) && xCAT::Utils->thishostisnot($cfgent->{conserver})) { # let the master handle it
+    if ((!$isSN) && ($cfgent->{conserver}) && xCAT::NetworkUtils->thishostisnot($cfgent->{conserver})) { # let the master handle it
       push @$content,"  master ".$cfgent->{conserver}.";\n";
     } else { # handle it here
       my $locerror = $isSN ? "PERL_BADLANG=0 " : '';    # on service nodes, often LC_ALL is not set and perl complains
diff --git a/xCAT-server/lib/xcat/plugins/ddns.pm b/xCAT-server/lib/xcat/plugins/ddns.pm
index 8117a3bc9..4e2b6ac6e 100644
--- a/xCAT-server/lib/xcat/plugins/ddns.pm
+++ b/xCAT-server/lib/xcat/plugins/ddns.pm
@@ -5,6 +5,7 @@ use Net::DNS;
 use File::Path;
 use xCAT::Table;
 use Sys::Hostname;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils qw/getipaddr/;
 use Math::BigInt;
 use MIME::Base64;
@@ -27,7 +28,7 @@ sub handled_commands
 {
     #my $sitetab = xCAT::Table->new('site');
     #my $stab = $sitetab->getAttribs({key=>'dnshandler'},['value']);
-    my @entries =  xCAT::Utils->get_site_attribute("dnshandler");
+    my @entries =  xCAT::TableUtils->get_site_attribute("dnshandler");
     my $site_entry = $entries[0];
     unless ( defined($site_entry)) {
         return {"makedns" => "ddns"};
@@ -242,7 +243,7 @@ sub process_request {
     # check for site.domain     
     #my $sitetab = xCAT::Table->new('site');
     #my $stab = $sitetab->getAttribs({key=>'domain'},['value']);
-    my @entries =  xCAT::Utils->get_site_attribute("domain");
+    my @entries =  xCAT::TableUtils->get_site_attribute("domain");
     my $site_entry = $entries[0];
     unless ( defined($site_entry)) {
         xCAT::SvrUtils::sendmsg([1,"domain not defined in site table"], $callback);
@@ -411,7 +412,7 @@ sub process_request {
     } #do not warn/error here yet, if we can't generate or extract, we'll know later
 
     #$stab =  $sitetab->getAttribs({key=>'forwarders'},['value']);
-    my @entries =  xCAT::Utils->get_site_attribute("forwarders");
+    my @entries =  xCAT::TableUtils->get_site_attribute("forwarders");
     my $site_entry = $entries[0];
     if ( defined($site_entry)) {
         my @forwarders = split /[ ,]/,$site_entry;
@@ -435,11 +436,11 @@ sub process_request {
         #here, we are examining local files to assure that our key is in named.conf, the zones we care about are there, and that if
         #active directory is in use, allow the domain controllers to update specific zones
         #$stab =$sitetab->getAttribs({key=>'directoryprovider'},['value']);
-        @entries =  xCAT::Utils->get_site_attribute("directoryprovider");
+        @entries =  xCAT::TableUtils->get_site_attribute("directoryprovider");
         $site_entry = $entries[0];
         if ( defined($site_entry) and $site_entry eq 'activedirectory') {
             #$stab =$sitetab->getAttribs({key=>'directoryservers'},['value']);
-            @entries =  xCAT::Utils->get_site_attribute("directoryservers");
+            @entries =  xCAT::TableUtils->get_site_attribute("directoryservers");
             $site_entry = $entries[0];
             if ( defined($site_entry)) {
                 my @dservers = split /[ ,]/,$site_entry;
@@ -453,7 +454,7 @@ sub process_request {
             }
         }
         #$stab =$sitetab->getAttribs({key=>'dnsupdaters'},['value']); #allow unsecure updates from these
-        @entries =  xCAT::Utils->get_site_attribute("dnsupdaters");
+        @entries =  xCAT::TableUtils->get_site_attribute("dnsupdaters");
         $site_entry = $entries[0];
         if ( defined($site_entry) ) {
                 my @nservers = split /[ ,]/,$site_entry;
@@ -550,7 +551,7 @@ sub get_zonesdir {
     #    xCAT::MsgUtils->message("E", $rsp, $callback, 1);
     #}
     
-    my @entries =  xCAT::Utils->get_site_attribute("bindzones");
+    my @entries =  xCAT::TableUtils->get_site_attribute("bindzones");
     my $site_entry = $entries[0];
 
     #if ($sitetab) {
@@ -579,7 +580,7 @@ sub get_conf {
     #    xCAT::MsgUtils->message("E", $rsp, $callback, 1);
     #}
     
-    my @entries =  xCAT::Utils->get_site_attribute("bindconf");
+    my @entries =  xCAT::TableUtils->get_site_attribute("bindconf");
     my $site_entry = $entries[0];
 
     #if ($sitetab) {
@@ -602,7 +603,7 @@ sub get_dbdir {
     #    xCAT::MsgUtils->message("E", $rsp, $callback, 1);
     #}
 
-    my @entries =  xCAT::Utils->get_site_attribute("binddir");
+    my @entries =  xCAT::TableUtils->get_site_attribute("binddir");
     my $site_entry = $entries[0];
     #if ($sitetab) {
         #(my $ref) = $sitetab->getAttribs({key => 'binddir'}, 'value');
diff --git a/xCAT-server/lib/xcat/plugins/debian.pm b/xCAT-server/lib/xcat/plugins/debian.pm
index 2176550bb..627ed4732 100644
--- a/xCAT-server/lib/xcat/plugins/debian.pm
+++ b/xCAT-server/lib/xcat/plugins/debian.pm
@@ -10,6 +10,7 @@ use Sys::Syslog;
 use File::Temp qw/tempdir/;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::SvrUtils;
 use xCAT::MsgUtils;
 use Data::Dumper;
@@ -827,7 +828,7 @@ sub mkinstall
                     );
         }
     }
-    #my $rc = xCAT::Utils->create_postscripts_tar();
+    #my $rc = xCAT::TableUtils->create_postscripts_tar();
     #if ($rc != 0)
     #{
     #    xCAT::MsgUtils->message("S", "Error creating postscripts tar file.");
@@ -1423,7 +1424,7 @@ sub mknetboot
                       );
     }
 
-    #my $rc = xCAT::Utils->create_postscripts_tar();
+    #my $rc = xCAT::TableUtils->create_postscripts_tar();
     #if ( $rc != 0 ) {
     #	xCAT::MsgUtils->message( "S", "Error creating postscripts tar file." );
     #}
diff --git a/xCAT-server/lib/xcat/plugins/destiny.pm b/xCAT-server/lib/xcat/plugins/destiny.pm
index 818ea15c1..dc1a0f932 100644
--- a/xCAT-server/lib/xcat/plugins/destiny.pm
+++ b/xCAT-server/lib/xcat/plugins/destiny.pm
@@ -3,6 +3,7 @@ package xCAT_plugin::destiny;
 use xCAT::NodeRange;
 use Data::Dumper;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use Sys::Syslog;
 use xCAT::GlobalDef;
 use xCAT::Table;
@@ -29,7 +30,7 @@ my $nonodestatus=0;
 #my $sitetab = xCAT::Table->new('site');
 #if ($sitetab) {
     #(my $ref1) = $sitetab->getAttribs({key => 'nodestatus'}, 'value');
-    my @entries =  xCAT::Utils->get_site_attribute("nodestatus");
+    my @entries =  xCAT::TableUtils->get_site_attribute("nodestatus");
     my $site_entry = $entries[0];
     if ( defined($site_entry) ) {
 	if ($site_entry =~ /0|n|N/) { $nonodestatus=1; }
@@ -49,7 +50,7 @@ sub process_request {
   $callback = shift;
   $subreq = shift;
   if (xCAT::Utils->isMN()) {
-      my $result= xCAT::Utils->checkCredFiles($callback);
+      my $result= xCAT::TableUtils->checkCredFiles($callback);
   }
   if ($request->{command}->[0] eq 'getdestiny') {
     getdestiny(0);
@@ -236,10 +237,10 @@ sub setdestiny {
     my $nodehm = xCAT::Table->new('nodehm');
     my $hments = $nodehm->getNodesAttribs(\@nodes,['serialport','serialspeed','serialflow']);
     #(my $portent) = $sitetab->getAttribs({key=>'xcatdport'},'value');
-    my @entries =  xCAT::Utils->get_site_attribute("xcatdport");
+    my @entries =  xCAT::TableUtils->get_site_attribute("xcatdport");
     my $port_entry = $entries[0];
     #(my $mastent) = $sitetab->getAttribs({key=>'master'},'value');
-    my @entries =  xCAT::Utils->get_site_attribute("master");
+    my @entries =  xCAT::TableUtils->get_site_attribute("master");
     my $master_entry = $entries[0];
     my $enthash = $nodetype->getNodesAttribs(\@nodes,[qw(arch)]);
     my $resents = $restab->getNodeAttribs(\@nodes,[qw(xcatmaster)]);
@@ -465,7 +466,7 @@ sub getdestiny {
   my $bpents = $bptab->getNodesAttribs(\@nodes,[qw(kernel initrd kcmdline xcatmaster)]);
   #my $sitetab= xCAT::Table->new('site');
   #(my $sent) = $sitetab->getAttribs({key=>'master'},'value');
-  my @entries =  xCAT::Utils->get_site_attribute("master");
+  my @entries =  xCAT::TableUtils->get_site_attribute("master");
   my $master_value = $entries[0];
 
   my %node_status=();
@@ -521,7 +522,7 @@ sub getdestiny {
     } elsif (defined( $master_value )) {
         $response{imgserver}=$master_value;
     } else {
-       $response{imgserver} = xCAT::Utils->my_ip_facing($node);
+       $response{imgserver} = xCAT::NetworkUtils->my_ip_facing($node);
     }
     
     #collect node status for certain states
diff --git a/xCAT-server/lib/xcat/plugins/dhcp.pm b/xCAT-server/lib/xcat/plugins/dhcp.pm
index c1b91c29d..042eb63de 100644
--- a/xCAT-server/lib/xcat/plugins/dhcp.pm
+++ b/xCAT-server/lib/xcat/plugins/dhcp.pm
@@ -20,8 +20,10 @@ my $candoipv6 = eval {
 };
 use Sys::Syslog;
 use IPC::Open2;
-use xCAT::NetworkUtils qw/getipaddr/;
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::NetworkUtils qw/getipaddr/;
+use xCAT::ServiceNodeUtils;
 use xCAT::NodeRange;
 use Fcntl ':flock';
 
@@ -46,7 +48,7 @@ my $vpdhash;
 my $iscsients;
 my $nodetypeents;
 my $chainents;
-my $tftpdir = xCAT::Utils->getTftpDir();
+my $tftpdir = xCAT::TableUtils->getTftpDir();
 use Math::BigInt;
 my $dhcpconffile = $^O eq 'aix' ? '/etc/dhcpsd.cnf' : '/etc/dhcpd.conf'; 
 my %dynamicranges; #track dynamic ranges defined to see if a host that resolves is actually a dynamic address
@@ -385,7 +387,7 @@ sub addnode
 #        } #if 'guess_next_server', inherit from the network provided value... see how this pans out
 #       if ($guess_next_server and $ip and $ip ne "DENIED")
 #       {
-#           $nxtsrv = xCAT::Utils->my_ip_facing($hname);
+#           $nxtsrv = xCAT::NetworkUtils->my_ip_facing($hname);
 #           if ($nxtsrv)
 #           {
 #               $tftpserver = $nxtsrv;
@@ -534,7 +536,7 @@ sub addrangedetection {
     my $begin;
     my $end;
     my $myip;
-    $myip = xCAT::Utils->my_ip_facing($net->{net});
+    $myip = xCAT::NetworkUtils->my_ip_facing($net->{net});
     
     # convert <xcatmaster> to nameserver IP
     if ($net->{nameservers} eq '<xcatmaster>')
@@ -620,7 +622,7 @@ sub addnode_aix
     {
         if ( $dhcpconf[$i] =~ / ([\d\.]+)\/(\d+) ip configuration end/)
         {
-            if (xCAT::Utils::isInSameSubnet( $ip, $1, $2, 1))
+            if (xCAT::NetworkUtils::isInSameSubnet( $ip, $1, $2, 1))
             {
                 $isSubnetFound = 1;
                 $netmask = $2;
@@ -630,7 +632,7 @@ sub addnode_aix
     }
 
 # Format the netmask from AIX format (24) to Linux format (255.255.255.0)
-    my $netmask_linux = xCAT::Utils::formatNetmask( $netmask,1,0);
+    my $netmask_linux = xCAT::NetworkUtils::formatNetmask( $netmask,1,0);
 
     # Create node section
     my @node_section = ();
@@ -715,7 +717,7 @@ sub preprocess_request
     #{
         #my $href;
         #($href) = $sitetab->getAttribs({key => 'disjointdhcps'}, 'value');
-        my @entries =  xCAT::Utils->get_site_attribute("disjointdhcps");
+        my @entries =  xCAT::TableUtils->get_site_attribute("disjointdhcps");
         my $t_entry = $entries[0];
         if (defined($t_entry)) {
 	    $snonly=$t_entry;
@@ -786,10 +788,10 @@ sub preprocess_request
 
     if (($snonly == 1) && (! grep /-n/,@{$req->{arg}})) {
         if (@nodes > 0) {
-	    my $sn_hash =xCAT::Utils->getSNformattedhash(\@nodes,"xcat","MN"); 
+	    my $sn_hash =xCAT::ServiceNodeUtils->getSNformattedhash(\@nodes,"xcat","MN"); 
 	    if ($localonly) {
 		#check if this node is the service node for any input node
-		my @hostinfo=xCAT::Utils->determinehostname();
+		my @hostinfo=xCAT::NetworkUtils->determinehostname();
 		my %iphash=();
 		foreach(@hostinfo) {$iphash{$_}=1;}
 		foreach(keys %$sn_hash) {
@@ -802,7 +804,7 @@ sub preprocess_request
 		    }
 		}
 	    } else {
-		my @sn = xCAT::Utils->getSNList('dhcpserver');
+		my @sn = xCAT::ServiceNodeUtils->getSNList('dhcpserver');
 		if (@sn > 0) { $hasHierarchy=1;}
 
 		foreach(keys %$sn_hash) {
@@ -818,7 +820,7 @@ sub preprocess_request
         $req->{'node'}=\@nodes;
        	@requests = ({%$req});    #Start with a straight copy to reflect local instance
 	unless ($localonly) {
-	    my @sn = xCAT::Utils->getSNList('dhcpserver');
+	    my @sn = xCAT::ServiceNodeUtils->getSNList('dhcpserver');
 	    if (@sn > 0) { $hasHierarchy=1; }
 
 	    foreach my $s (@sn)
@@ -865,10 +867,10 @@ sub process_request
     my $isok=1;
     if (xCAT::Utils->isServiceNode()) {
 	$isok=0;
-	my @hostinfo=xCAT::Utils->determinehostname();
+	my @hostinfo=xCAT::NetworkUtils->determinehostname();
 	my %iphash=();
 	foreach(@hostinfo) {$iphash{$_}=1;}
-	my @sn = xCAT::Utils->getSNList('dhcpserver');
+	my @sn = xCAT::ServiceNodeUtils->getSNList('dhcpserver');
 	foreach my $s (@sn)
 	{
 	    if (exists($iphash{$s})) {
@@ -889,11 +891,11 @@ sub process_request
     #{
         #my $href;
         #($href) = $sitetab->getAttribs({key => 'dhcpinterfaces'}, 'value');
-        my @entries =  xCAT::Utils->get_site_attribute("dhcpinterfaces");
+        my @entries =  xCAT::TableUtils->get_site_attribute("dhcpinterfaces");
         my $t_entry = $entries[0];
         unless ( defined($t_entry) )
         {    #LEGACY: singular keyname for old style site value
-            @entries =  xCAT::Utils->get_site_attribute("dhcpinterface");
+            @entries =  xCAT::TableUtils->get_site_attribute("dhcpinterface");
             $t_entry = $entries[0];
             #($href) = $sitetab->getAttribs({key => 'dhcpinterface'}, 'value');
         }
@@ -913,14 +915,14 @@ sub process_request
                  (my $ngroup,$dhcpif) = split /\|/,$dhcpif;
                  foreach $host (noderange($ngroup)) {
                     $savehost=$host;
-                    unless (xCAT::Utils->thishostisnot($host)) {
+                    unless (xCAT::NetworkUtils->thishostisnot($host)) {
                         $foundself=1;
                         last;
                     }
                  }
                  if (!defined($savehost)) { # host not defined in db,
                                  # probably management node
-                    unless (xCAT::Utils->thishostisnot($ngroup)) {
+                    unless (xCAT::NetworkUtils->thishostisnot($ngroup)) {
                         $foundself=1;
                     }
                  }
@@ -936,26 +938,26 @@ sub process_request
            }
         }
         #($href) = $sitetab->getAttribs({key => 'nameservers'}, 'value');
-        @entries =  xCAT::Utils->get_site_attribute("nameservers");
+        @entries =  xCAT::TableUtils->get_site_attribute("nameservers");
         $t_entry = $entries[0];
         if ( defined($t_entry) ) {
             $sitenameservers = $t_entry;
         }
         #($href) = $sitetab->getAttribs({key => 'ntpservers'}, 'value');
-        @entries =  xCAT::Utils->get_site_attribute("ntpservers");
+        @entries =  xCAT::TableUtils->get_site_attribute("ntpservers");
         $t_entry = $entries[0];
         if ( defined($t_entry) ) {
             $sitentpservers = $t_entry;
         }
         #($href) = $sitetab->getAttribs({key => 'logservers'}, 'value');
-        @entries =  xCAT::Utils->get_site_attribute("logservers");
+        @entries =  xCAT::TableUtils->get_site_attribute("logservers");
         $t_entry = $entries[0];
         if ( defined($t_entry) ) {
             $sitelogservers = $t_entry;
         }
         #($href) = $sitetab->getAttribs({key => 'domain'}, 'value');
         #($href) = $sitetab->getAttribs({key => 'domain'}, 'value');
-        @entries =  xCAT::Utils->get_site_attribute("domain");
+        @entries =  xCAT::TableUtils->get_site_attribute("domain");
         $t_entry = $entries[0];
         unless ( defined($t_entry) )
         {
@@ -1047,7 +1049,7 @@ sub process_request
     }
     if ($^O eq 'aix')
     {
-        @nrn = xCAT::Utils::get_subnet_aix();
+        @nrn = xCAT::NetworkUtils::get_subnet_aix();
     }
     else
     {
@@ -1319,7 +1321,7 @@ sub process_request
         my $ip_hash;
         foreach my $node ( @{$req->{node}} ) {
             #need to change the way of finding IP for nodes
-            my $ifip = xCAT::Utils->isIpaddr($node);
+            my $ifip = xCAT::NetworkUtils->isIpaddr($node);
             if ($ifip)
             {
                 $ip_hash->{ $node} = $node;
@@ -1406,7 +1408,7 @@ sub process_request
             }
             else
             {
-                if  (xCAT::NetworkUtils->getipaddr($_) and not xCAT::Utils->nodeonmynet($_))
+                if  (xCAT::NetworkUtils->getipaddr($_) and not xCAT::NetworkUtils->nodeonmynet($_))
                 {
                     next;
                 }
@@ -1579,7 +1581,7 @@ sub putmyselffirst {
                 my @dnsrvs = split /,/,$srvlist;
                 my @reordered;
                 foreach (@dnsrvs) {
-                    if (xCAT::Utils->thishostisnot($_)) {
+                    if (xCAT::NetworkUtils->thishostisnot($_)) {
                         push @reordered,$_;
                     } else {
                         unshift @reordered,$_;
@@ -1722,7 +1724,7 @@ sub addnet
         my $tftp;
         my $range;
         my $myip;
-        $myip = xCAT::Utils->my_ip_facing($net);
+        $myip = xCAT::NetworkUtils->my_ip_facing($net);
         if ($nettab)
         {
             my $mask_formated = $mask;
@@ -1805,7 +1807,7 @@ sub addnet
             if ($ent and $ent->{dynamicrange})
             {
                 unless ($ent->{dhcpserver}
-                        and xCAT::Utils->thishostisnot($ent->{dhcpserver}))
+                        and xCAT::NetworkUtils->thishostisnot($ent->{dhcpserver}))
                 {    #If specific, only one dhcp server gets a dynamic range
                     $range = $ent->{dynamicrange};
                     $range =~ s/[,-]/ /g;
@@ -2004,7 +2006,7 @@ sub gen_aix_net
                 $gateway = '';
             }
         }
-        if (xCAT::Utils::isInSameSubnet($gateway,$net,$mask,1))
+        if (xCAT::NetworkUtils::isInSameSubnet($gateway,$net,$mask,1))
         {
             push @netent, "    option 3 $gateway\n";
         }
diff --git a/xCAT-server/lib/xcat/plugins/esx.pm b/xCAT-server/lib/xcat/plugins/esx.pm
index 2c7180705..00671cc0d 100644
--- a/xCAT-server/lib/xcat/plugins/esx.pm
+++ b/xCAT-server/lib/xcat/plugins/esx.pm
@@ -4,6 +4,8 @@ use strict;
 use warnings;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::TZUtils;
 use Time::HiRes qw (sleep);
 use xCAT::Template;
@@ -232,7 +234,7 @@ sub preprocess_request {
     my @allnodes;
     push @allnodes,@hyps;
     push @allnodes,@$noderange;
-	my $sn = xCAT::Utils->get_ServiceNode(\@allnodes, $service, "MN");
+	my $sn = xCAT::ServiceNodeUtils->get_ServiceNode(\@allnodes, $service, "MN");
     #vmtabhash was from when we had vm.host do double duty for hypervisor data
     #$vmtabhash = $vmtab->getNodesAttribs(\@hyps,['host']);
     #We now use hypervisor fields to be unambiguous
@@ -347,13 +349,13 @@ sub process_request {
 	#my $sitetab = xCAT::Table->new('site');
 	#if($sitetab){
 		#(my $ref) = $sitetab->getAttribs({key => 'usehostnamesforvcenter'}, 'value');
-                my @entries =  xCAT::Utils->get_site_attribute("usehostnamesforvcenter");
+                my @entries =  xCAT::TableUtils->get_site_attribute("usehostnamesforvcenter");
                 my $t_entry = $entries[0];
 		if ( defined($t_entry) ) {
 			$usehostnamesforvcenter = $t_entry;
 		}
 		#($ref) = $sitetab->getAttribs({key => 'vcenterautojoin'}, 'value');
-                @entries =  xCAT::Utils->get_site_attribute("vcenterautojoin");
+                @entries =  xCAT::TableUtils->get_site_attribute("vcenterautojoin");
                 $t_entry = $entries[0];
 		if ( defined($t_entry) ) {
                    $vcenterautojoin = $t_entry;
@@ -362,7 +364,7 @@ sub process_request {
                    }
 		}
 		#($ref) = $sitetab->getAttribs({key => 'vmwaredatastoreautomount'}, 'value');
-                @entries =  xCAT::Utils->get_site_attribute("vmwaredatastoreautomount");
+                @entries =  xCAT::TableUtils->get_site_attribute("vmwaredatastoreautomount");
                 $t_entry = $entries[0];
 		if ( defined($t_entry) ) {
 			$datastoreautomount = $t_entry;
@@ -371,7 +373,7 @@ sub process_request {
                     }
 		}
                 #($ref) = $sitetab->getAttribs({key => 'vmwarereconfigonpower'},'value');
-                @entries =  xCAT::Utils->get_site_attribute("vmwarereconfigonpower");
+                @entries =  xCAT::TableUtils->get_site_attribute("vmwarereconfigonpower");
                 $t_entry = $entries[0];
 		if ( defined($t_entry) ) {
                     $reconfigreset=$t_entry;
@@ -4077,7 +4079,7 @@ sub copycd {
 	#my $sitetab = xCAT::Table->new('site');
 	#if($sitetab){
 		#(my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
-                my @entries =  xCAT::Utils->get_site_attribute("installdir");
+                my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
                 my $t_entry = $entries[0];
 		if ( defined($t_entry) ) {
 			$installroot = $t_entry;
@@ -4479,13 +4481,13 @@ sub mkcommonboot {
 	my $installroot = "/install";
 	#if ($sitetab){
 		#(my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
-                my @entries =  xCAT::Utils->get_site_attribute("installdir");
+                my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
                 my $t_entry = $entries[0];
 		if ( defined($t_entry) ) {
                     $installroot = $t_entry;
 		}
 		#($ref) = $sitetab->getAttribs({key => 'tftpdir'}, 'value');
-                @entries =  xCAT::Utils->get_site_attribute("tftpdir");
+                @entries =  xCAT::TableUtils->get_site_attribute("tftpdir");
                 $t_entry = $entries[0];
 		if ( defined($t_entry) ) {
                     $globaltftpdir = $t_entry;
diff --git a/xCAT-server/lib/xcat/plugins/fsp.pm b/xCAT-server/lib/xcat/plugins/fsp.pm
index 1d767c6e6..e496f7fbb 100644
--- a/xCAT-server/lib/xcat/plugins/fsp.pm
+++ b/xCAT-server/lib/xcat/plugins/fsp.pm
@@ -255,7 +255,7 @@ sub getfspcon {
    
     my %request; 
     xCAT::FSPUtils::getHcpAttribs(\%request, \%tabs); 
-    #my $fsp_ip = xCAT::Utils::getNodeIPaddress( $fsp_name );
+    #my $fsp_ip = xCAT::NetworkUtils::getNodeIPaddress( $fsp_name );
     my $fsp_ip = xCAT::FSPUtils::getIPaddress(\%request, $type, $fsp_name );
     if(!defined($fsp_ip)) {
         #return "Failed to get the $fsp_name\'s ip";
diff --git a/xCAT-server/lib/xcat/plugins/genimage.pm b/xCAT-server/lib/xcat/plugins/genimage.pm
index 714e0a822..6fe3cff34 100644
--- a/xCAT-server/lib/xcat/plugins/genimage.pm
+++ b/xCAT-server/lib/xcat/plugins/genimage.pm
@@ -5,6 +5,7 @@ BEGIN
 }
 use lib "$::XCATROOT/lib/perl";
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::SvrUtils;
 use xCAT::Table;
 #use Data::Dumper;
@@ -41,7 +42,7 @@ sub process_request {
 
    #now handle genimage
    my $installroot = "/install";
-   $installroot = xCAT::Utils->getInstallDir();
+   $installroot = xCAT::TableUtils->getInstallDir();
    my $prinic; #TODO be flexible on node primary nic
    my $othernics; #TODO be flexible on node primary nic
    my $netdriver;
diff --git a/xCAT-server/lib/xcat/plugins/hosts.pm b/xCAT-server/lib/xcat/plugins/hosts.pm
index 8d286af30..58594e9ab 100644
--- a/xCAT-server/lib/xcat/plugins/hosts.pm
+++ b/xCAT-server/lib/xcat/plugins/hosts.pm
@@ -3,6 +3,7 @@ package xCAT_plugin::hosts;
 use strict;
 use warnings;
 use xCAT::Table;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
 use Data::Dumper;
 use File::Copy;
@@ -117,7 +118,7 @@ sub addotherinterfaces {
     my @itf_pairs=split(/,/, $otherinterfaces);
     foreach (@itf_pairs) {
       my ($itf,$ip)=split(/:/, $_);
-      if ( $ip && xCAT::Utils->isIpaddr($ip) ) {
+      if ( $ip && xCAT::NetworkUtils->isIpaddr($ip) ) {
           if ($itf =~ /^-/ ) {
               $itf = $node.$itf };
           addnode $itf,$ip,'',$domain;
@@ -168,7 +169,7 @@ sub process_request {
   my $lockh;
   #if ($sitetab) {
     #my $dent = $sitetab->getAttribs({key=>'domain'},'value');
-    my @entries =  xCAT::Utils->get_site_attribute("domain");
+    my @entries =  xCAT::TableUtils->get_site_attribute("domain");
     my $t_entry = $entries[0];
     if ( defined($t_entry) ) {
         $domain=$t_entry;
@@ -229,7 +230,7 @@ sub process_request {
           if ($DELNODE) {
               delnode $ref->{node},$ref->{ip},$ref->{hostnames},$domain;
           } else {
-              if ( xCAT::Utils->isIpaddr($ref->{ip}) ) { 
+              if ( xCAT::NetworkUtils->isIpaddr($ref->{ip}) ) { 
                   addnode $ref->{node},$ref->{ip},$ref->{hostnames},$domain;
               }
               if (defined($ref->{otherinterfaces})){
@@ -244,7 +245,7 @@ sub process_request {
       }
     my @hostents = $hoststab->getAllNodeAttribs(['ip','node','hostnames','otherinterfaces']);
     foreach (@hostents) {
-        if ( xCAT::Utils->isIpaddr($_->{ip}) ) {
+        if ( xCAT::NetworkUtils->isIpaddr($_->{ip}) ) {
             addnode $_->{node},$_->{ip},$_->{hostnames},$domain;
         }
         if (defined($_->{otherinterfaces})){
diff --git a/xCAT-server/lib/xcat/plugins/hpblade.pm b/xCAT-server/lib/xcat/plugins/hpblade.pm
index 9f5c80004..4b9c41180 100755
--- a/xCAT-server/lib/xcat/plugins/hpblade.pm
+++ b/xCAT-server/lib/xcat/plugins/hpblade.pm
@@ -17,6 +17,8 @@ use lib "$::XCATROOT/lib/perl";
 use strict;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::Usage;
 use IO::Socket;
 use Thread 'yield';
@@ -363,7 +365,7 @@ sub preprocess_request {
 	# build an individual request for each service node
 	my $service  = "xcat";
 	my @mms=keys(%mpa_hash);
-	my $sn = xCAT::Utils->get_ServiceNode(\@mms, $service, "MN");
+	my $sn = xCAT::ServiceNodeUtils->get_ServiceNode(\@mms, $service, "MN");
 		
 	# build each request for each service node
 	foreach my $snkey (keys %$sn)
@@ -644,7 +646,7 @@ sub process_request {
 	my $tmp;
 	#if ($sitetab) {
 		#($tmp)=$sitetab->getAttribs({'key'=>'blademaxp'},'value');
-                my @entries =  xCAT::Utils->get_site_attribute("blademaxp");
+                my @entries =  xCAT::TableUtils->get_site_attribute("blademaxp");
                 my $t_entry = $entries[0];
 		if (defined($t_entry)) { $blademaxp=$t_entry; }
 	#}
diff --git a/xCAT-server/lib/xcat/plugins/imgcapture.pm b/xCAT-server/lib/xcat/plugins/imgcapture.pm
index 5ac2db812..5c15874ea 100644
--- a/xCAT-server/lib/xcat/plugins/imgcapture.pm
+++ b/xCAT-server/lib/xcat/plugins/imgcapture.pm
@@ -16,6 +16,7 @@ use Data::Dumper;   # for debug purpose
 use Getopt::Long;
 use xCAT::MsgUtils;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::SvrUtils;
 use xCAT::Table;
 use File::Path qw(mkpath);
@@ -40,7 +41,7 @@ sub process_request {
         $node = $request->{node}->[0];
     }
 
-    $installroot = xCAT::Utils->getInstallDir();
+    $installroot = xCAT::TableUtils->getInstallDir();
     @ARGV = @{$request->{arg}} if (defined $request->{arg});
     my $argc = scalar @ARGV;
 
diff --git a/xCAT-server/lib/xcat/plugins/imgport.pm b/xCAT-server/lib/xcat/plugins/imgport.pm
index b3dffe3db..aa29c472d 100644
--- a/xCAT-server/lib/xcat/plugins/imgport.pm
+++ b/xCAT-server/lib/xcat/plugins/imgport.pm
@@ -18,6 +18,7 @@ use warnings;
 #use xCAT::Schema;
 #use xCAT::NodeRange qw/noderange abbreviate_noderange/;
 #use xCAT::Utils;
+use xCAT::TableUtils;
 use Data::Dumper;
 use XML::Simple;
 use POSIX qw/strftime/;
@@ -384,7 +385,7 @@ sub get_files{
 	my $xcatroot = "/opt/xcat";
 
 	# get the install root
-	my $installroot = xCAT::Utils->getInstallDir();
+	my $installroot = xCAT::TableUtils->getInstallDir();
 	unless($installroot){
 		$installroot = '/install';
 	}
@@ -841,7 +842,7 @@ sub change_profile {
     my $srcdir=shift;
 
     $data->{profile}=$new_profile;
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
     unless($installdir){
 	$installdir = '/install';
     }
@@ -897,7 +898,7 @@ sub check_media {
 	}elsif($data->{media} eq 'required'){
 		my $os = $data->{osvers};
 		my $arch = $data->{osarch};
-		my $installroot = xCAT::Utils->getInstallDir();
+		my $installroot = xCAT::TableUtils->getInstallDir();
 		unless($installroot){
 			$installroot = '/install';
 		}
@@ -1179,7 +1180,7 @@ sub make_files {
     my $os = $data->{osvers};
     my $arch = $data->{osarch};
     my $profile = $data->{profile};
-    my $installroot = xCAT::Utils->getInstallDir();
+    my $installroot = xCAT::TableUtils->getInstallDir();
     unless($installroot){
 	$installroot = '/install';
     }
diff --git a/xCAT-server/lib/xcat/plugins/ipmi.pm b/xCAT-server/lib/xcat/plugins/ipmi.pm
index b06bd64d4..83353a38b 100644
--- a/xCAT-server/lib/xcat/plugins/ipmi.pm
+++ b/xCAT-server/lib/xcat/plugins/ipmi.pm
@@ -20,6 +20,8 @@ use xCAT::IPMI;
 use POSIX qw(ceil floor);
 use Storable qw(store_fd retrieve_fd thaw freeze);
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::SvrUtils;
 use xCAT::Usage;
 use Thread qw(yield);
@@ -5563,7 +5565,7 @@ sub preprocess_request {
      if (defined $::XCATSITEVALS{ipmidispatch} and $::XCATSITEVALS{ipmidispatch} =~ /0|n/i) { #no SN indicated, instead do randomize
 	randomizelist($realnoderange);
      } else { # sn is indicated
-	my $bigsnmap = xCAT::Utils->get_ServiceNode($realnoderange, "xcat", "MN");
+	my $bigsnmap = xCAT::ServiceNodeUtils->get_ServiceNode($realnoderange, "xcat", "MN");
      	foreach my $servicenode (keys %$bigsnmap) { #let's also shuffle within each service node responsibliity
 		randomizelist($bigsnmap->{$servicenode})
 	}
@@ -5597,7 +5599,7 @@ sub preprocess_request {
      if (defined $::XCATSITEVALS{ipmidispatch} and $::XCATSITEVALS{ipmidispatch} =~ /0|n/i) {
         $sn = { '!xcatlocal!' => $noderange };
      } else {
-        $sn = xCAT::Utils->get_ServiceNode($noderange, "xcat", "MN");
+        $sn = xCAT::ServiceNodeUtils->get_ServiceNode($noderange, "xcat", "MN");
      }
 
      # build each request for each service node
diff --git a/xCAT-server/lib/xcat/plugins/iscsi.pm b/xCAT-server/lib/xcat/plugins/iscsi.pm
index be1d6d3c9..b967f603d 100644
--- a/xCAT-server/lib/xcat/plugins/iscsi.pm
+++ b/xCAT-server/lib/xcat/plugins/iscsi.pm
@@ -1,6 +1,7 @@
 package xCAT_plugin::iscsi;
 use strict;
 use xCAT::Table;
+use xCAT::TableUtils;
 use Socket;
 use File::Path;
 use File::Basename;
@@ -71,12 +72,12 @@ sub process_request {
    #}
    my $domain;
    #(my $ipent) = $sitetab->getAttribs({key=>'domain'},'value');
-   my @entries =  xCAT::Utils->get_site_attribute("domain");
+   my @entries =  xCAT::TableUtils->get_site_attribute("domain");
    my $t_entry = $entries[0];
    if ( defined($t_entry) ) { $domain = $t_entry; }
    #($ipent) = $sitetab->getAttribs({key=>'iscsidir'},'value');
    my $iscsiprefix;
-   my @entries =  xCAT::Utils->get_site_attribute("iscsidir");
+   my @entries =  xCAT::TableUtils->get_site_attribute("iscsidir");
    my $t_entry = $entries[0];
    if ( defined($t_entry) ) {
       $iscsiprefix = $t_entry;
diff --git a/xCAT-server/lib/xcat/plugins/kvm.pm b/xCAT-server/lib/xcat/plugins/kvm.pm
index 793e0d332..bace20840 100644
--- a/xCAT-server/lib/xcat/plugins/kvm.pm
+++ b/xCAT-server/lib/xcat/plugins/kvm.pm
@@ -22,6 +22,8 @@ use File::Basename qw/fileparse/;
 use File::Path qw/mkpath/;
 use IO::Socket;
 use IO::Select;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use strict;
 #use warnings;
 my $use_xhrm=0; #xCAT Hypervisor Resource Manager, to satisfy networking and storage prerequisites, default to not using it for the moment
@@ -2326,7 +2328,7 @@ sub preprocess_request {
   # find service nodes for requested nodes
   # build an individual request for each service node
   my $service  = "xcat";
-  my $sn = xCAT::Utils->get_ServiceNode($noderange, $service, "MN");
+  my $sn = xCAT::ServiceNodeUtils->get_ServiceNode($noderange, $service, "MN");
 
   # build each request for each service node
 
diff --git a/xCAT-server/lib/xcat/plugins/lsslp.pm b/xCAT-server/lib/xcat/plugins/lsslp.pm
index 413356600..d0980c40e 100644
--- a/xCAT-server/lib/xcat/plugins/lsslp.pm
+++ b/xCAT-server/lib/xcat/plugins/lsslp.pm
@@ -822,7 +822,7 @@ sub get_host_from_url {
     #######################################
     # Extract IP from URL
     #######################################
-    my $nets = xCAT::Utils::my_nets();
+    my $nets = xCAT::NetworkUtils::my_nets();
     my $inc = $globalopt{i};
     my @ips = (exists $attr->{'ip-address'})? @{$attr->{'ip-address'}}: @{$attr->{'ipv4-address'}};
 
@@ -846,7 +846,7 @@ sub get_host_from_url {
         next if ( $tip =~ /:/); #skip IPV6 addresses
         for my $net ( keys %$nets) {
             my ($n,$m) = split /\//,$net;
-            if ( #xCAT::Utils::isInSameSubnet($n, $tip, $m, 1) and
+            if ( #xCAT::NetworkUtils::isInSameSubnet($n, $tip, $m, 1) and
                  xCAT::Utils::isPingable($tip) and (length(inet_aton($tip)) == 4)) {
                 push @validip, $tip;
             }
@@ -1637,7 +1637,7 @@ sub filtersamevlan {
     my $request = shift;
     my $oldhash = shift;
     my $newhash;
-    my $nets = xCAT::Utils::my_nets();
+    my $nets = xCAT::NetworkUtils::my_nets();
     my $validnets;
     for my $net ( keys %$nets) {
         for my $nic ( split /,/, $globalopt{i} ) {
@@ -1651,7 +1651,7 @@ sub filtersamevlan {
             my $ip = $name->{ip};
             for my $net ( keys %$validnets){
                 my ($n,$m) = split /\//,$net;
-                if ( xCAT::Utils::isInSameSubnet( $n, $ip, $m, 1) and xCAT::Utils::isPingable( $ip)) {
+                if ( xCAT::NetworkUtils::isInSameSubnet( $n, $ip, $m, 1) and xCAT::NetworkUtils::isPingable( $ip)) {
                     $newhash->{$name} = ${$oldhash->{$name}}{hostname};
                 }
             }
diff --git a/xCAT-server/lib/xcat/plugins/makeknownhosts.pm b/xCAT-server/lib/xcat/plugins/makeknownhosts.pm
index 7b004a433..db5572905 100644
--- a/xCAT-server/lib/xcat/plugins/makeknownhosts.pm
+++ b/xCAT-server/lib/xcat/plugins/makeknownhosts.pm
@@ -15,7 +15,7 @@ use strict;
 require xCAT::Table;
 
 require xCAT::Utils;
-
+require xCAT::TableUtils;
 require xCAT::MsgUtils;
 use Getopt::Long;
 use Socket;
@@ -253,7 +253,7 @@ sub add_known_host
     if (defined $hostname)
     {
         my $sitedomain;
-        my @domain = xCAT::Utils->get_site_attribute("domain");
+        my @domain = xCAT::TableUtils->get_site_attribute("domain");
         if ($domain[0])
         {
             $sitedomain = $domain[0];
diff --git a/xCAT-server/lib/xcat/plugins/mknb.pm b/xCAT-server/lib/xcat/plugins/mknb.pm
index 3b14fada9..2b13b37e2 100644
--- a/xCAT-server/lib/xcat/plugins/mknb.pm
+++ b/xCAT-server/lib/xcat/plugins/mknb.pm
@@ -2,6 +2,7 @@ package xCAT_plugin::mknb;
 use strict;
 use File::Temp qw(tempdir);
 use xCAT::Utils;
+use xCAT::TableUtils;
 use File::Path;
 use File::Copy;
 
@@ -21,25 +22,25 @@ sub process_request {
    my $xcatdport = 3001;
    #if ($sitetab) {
       #my $portent = $sitetab->getAttribs({key=>'defserialport'},'value');
-      my @entries =  xCAT::Utils->get_site_attribute("defserialport");
+      my @entries =  xCAT::TableUtils->get_site_attribute("defserialport");
       my $t_entry = $entries[0];
       if ( defined($t_entry) ) {
          $serialport=$t_entry;
       }
       #$portent = $sitetab->getAttribs({key=>'defserialspeed'},'value');
-      @entries =  xCAT::Utils->get_site_attribute("defserialspeed");
+      @entries =  xCAT::TableUtils->get_site_attribute("defserialspeed");
       $t_entry = $entries[0];
       if ( defined($t_entry) ) {
          $serialspeed=$t_entry;
       }
       #$portent = $sitetab->getAttribs({key=>'defserialflow'},'value');
-      @entries =  xCAT::Utils->get_site_attribute("defserialflow");
+      @entries =  xCAT::TableUtils->get_site_attribute("defserialflow");
       $t_entry = $entries[0];
       if ( defined($t_entry) ) {
          $serialflow=$t_entry;
       }
       #$portent = $sitetab->getAttribs({key=>'xcatdport'},'value');
-      @entries =  xCAT::Utils->get_site_attribute("xcatdport");
+      @entries =  xCAT::TableUtils->get_site_attribute("xcatdport");
       $t_entry = $entries[0];
       if ( defined($t_entry) ) {
          $xcatdport=$t_entry;
@@ -47,7 +48,7 @@ sub process_request {
       #$sitetab->close;
    #}
 
-   my $tftpdir = xCAT::Utils->getTftpDir();
+   my $tftpdir = xCAT::TableUtils->getTftpDir();
    my $arch = $request->{arg}->[0];
    if (! $arch) {
       $callback->({error=>"Need to specify architecture (x86, x86_64 or ppc64)"},{errorcode=>[1]});
@@ -140,7 +141,7 @@ sub process_request {
        system("cd $tempdir; find . | cpio -o -H newc | gzip -9 > $tftpdir/xcat/nbfs.$arch.gz");
    }
    system ("rm -rf $tempdir");
-   my $hexnets = xCAT::Utils->my_hexnets();
+   my $hexnets = xCAT::NetworkUtils->my_hexnets();
    my $normnets = xCAT::Utils->my_nets();
    my $consolecmdline;
    if (defined($serialport) and $serialspeed) {
diff --git a/xCAT-server/lib/xcat/plugins/monctrlcmds.pm b/xCAT-server/lib/xcat/plugins/monctrlcmds.pm
index 889ce9684..e624cc7bf 100644
--- a/xCAT-server/lib/xcat/plugins/monctrlcmds.pm
+++ b/xCAT-server/lib/xcat/plugins/monctrlcmds.pm
@@ -129,7 +129,7 @@ sub preprocess_request
 
      
       my @mon_servers=keys(%$mon_hierachy); 
-      my @hostinfo=xCAT::Utils->determinehostname();
+      my @hostinfo=xCAT::NetworkUtils->determinehostname();
       #print "hostinfo=@hostinfo\n";
       my $isSV=xCAT::Utils->isServiceNode();
       my %iphash=();
diff --git a/xCAT-server/lib/xcat/plugins/networks.pm b/xCAT-server/lib/xcat/plugins/networks.pm
index ab3914e17..256a93f16 100644
--- a/xCAT-server/lib/xcat/plugins/networks.pm
+++ b/xCAT-server/lib/xcat/plugins/networks.pm
@@ -5,7 +5,9 @@ use Data::Dumper;
 use Sys::Syslog;
 use Socket;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
+use xCAT::ServiceNodeUtils;
 use Getopt::Long;
 
 sub handled_commands
@@ -67,7 +69,7 @@ sub preprocess_request
         return undef;
     }
 
-    my @sn = xCAT::Utils->getSNList();
+    my @sn = xCAT::ServiceNodeUtils->getSNList();
     foreach my $s (@sn)
     {
         my $reqcopy = {%$req};
@@ -172,7 +174,7 @@ sub donets
 			return 1;
 		}
 
-                my $master=xCAT::Utils->get_site_Master();
+                my $master=xCAT::TableUtils->get_site_Master();
                 my $masterip = xCAT::NetworkUtils->getipaddr($master);  
                 if ($masterip =~ /:/) {
                     # do each ethernet interface for ipv6
@@ -278,7 +280,7 @@ sub donets
             		$netmask = $fields[2];
                         if ($fields[6])
                         {
-                            if(xCAT::Utils::isInSameSubnet($fields[6], $ipaddr, $netmask, 0))
+                            if(xCAT::NetworkUtils::isInSameSubnet($fields[6], $ipaddr, $netmask, 0))
                             {
                                 $gateway = $fields[6]; 
                             }
diff --git a/xCAT-server/lib/xcat/plugins/nodediscover.pm b/xCAT-server/lib/xcat/plugins/nodediscover.pm
index d4b79cb4d..b56172ecb 100644
--- a/xCAT-server/lib/xcat/plugins/nodediscover.pm
+++ b/xCAT-server/lib/xcat/plugins/nodediscover.pm
@@ -31,7 +31,7 @@ sub gethosttag {
    my $netn = shift;
    my $ifname = shift;
    my $usednames = shift;
-   my %netmap = %{xCAT::Utils::my_if_netmap()};
+   my %netmap = %{xCAT::NetworkUtils::my_if_netmap()};
    my $mgtifname = $netmap{$netn};
    my $secondpass = 0;
    my $name = "";
diff --git a/xCAT-server/lib/xcat/plugins/nodestat.pm b/xCAT-server/lib/xcat/plugins/nodestat.pm
index 0f9d3b2e0..036fbdc4f 100644
--- a/xCAT-server/lib/xcat/plugins/nodestat.pm
+++ b/xCAT-server/lib/xcat/plugins/nodestat.pm
@@ -22,7 +22,9 @@ use Getopt::Long;
 use Data::Dumper;
 use xCAT::GlobalDef;
 use xCAT::NetworkUtils;
-
+require xCAT::Utils;
+require xCAT::TableUtils;
+require xCAT::ServiceNodeUtils;
 
 my %nodesetstats;
 my %chainhash;
@@ -188,7 +190,7 @@ sub preprocess_request
 	    #my $sitetab = xCAT::Table->new('site');
 	    #if ($sitetab) {
 		#(my $ref) = $sitetab->getAttribs({key => 'useNmapfromMN'}, 'value');
-                my @entries =  xCAT::Utils->get_site_attribute("useNmapfromMN");
+                my @entries =  xCAT::TableUtils->get_site_attribute("useNmapfromMN");
                 my $t_entry = $entries[0];
 		if (defined($t_entry)) {
 		    if ($t_entry =~ /1|yes|YES|Y|y/) { $usenmapfrommn=1; }
@@ -253,7 +255,7 @@ sub preprocess_request
 	#print Dumper(%apps);
 	# find service nodes for requested nodes
 	# build an individual request for each service node
-	my $sn = xCAT::Utils->get_ServiceNode($nodes, $service, "MN");
+	my $sn = xCAT::ServiceNodeUtils->get_ServiceNode($nodes, $service, "MN");
 
         #get the member for each group
         my %groups=();
@@ -439,7 +441,7 @@ sub preprocess_request
 
         #mn handles all nmap when useNmapfromMN=1 on the site table
         if (($usenmapfrommn == 1) && (keys(%all_porthash) > 0)) {
-	    my @hostinfo=xCAT::Utils->determinehostname();
+	    my @hostinfo=xCAT::NetworkUtils->determinehostname();
 	    my %iphash=();
 	    foreach(@hostinfo) {$iphash{$_}=1;}
             my $handled=0;
@@ -490,7 +492,7 @@ sub preprocess_request
         #now handle local commands
 	#print "lcmdhash=" . Dumper(%lcmdhash);
         if (keys(%lcmdhash) > 0) {
-	    my @hostinfo=xCAT::Utils->determinehostname();
+	    my @hostinfo=xCAT::NetworkUtils->determinehostname();
 	    my %iphash=();
 	    foreach(@hostinfo) {$iphash{$_}=1;}
             my $handled=0;
diff --git a/xCAT-server/lib/xcat/plugins/ontap.pm b/xCAT-server/lib/xcat/plugins/ontap.pm
index 4d15ef03a..abe1eb3d4 100644
--- a/xCAT-server/lib/xcat/plugins/ontap.pm
+++ b/xCAT-server/lib/xcat/plugins/ontap.pm
@@ -19,6 +19,8 @@ BEGIN
 use lib "$::XCATROOT/lib/perl";
 use warnings "all";
 use xCAT::Table;
+require xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::SvrUtils;
 my $output_handler;
 my $newiqns;
@@ -57,7 +59,7 @@ sub process_request {
     my @nodes = @{$request->{node}};
     #my $sitetab = xCAT::Table->new('site');
     #(my $dent) = $sitetab->getAttribs({key=>'domain'},'value');
-    my @entries =  xCAT::Utils->get_site_attribute("domain");
+    my @entries =  xCAT::TableUtils->get_site_attribute("domain");
     my $t_entry = $entries[0];
     if ( defined($t_entry) ) {
         $domain = $t_entry;
diff --git a/xCAT-server/lib/xcat/plugins/packimage.pm b/xCAT-server/lib/xcat/plugins/packimage.pm
index 2060e894f..77363dfc6 100644
--- a/xCAT-server/lib/xcat/plugins/packimage.pm
+++ b/xCAT-server/lib/xcat/plugins/packimage.pm
@@ -13,7 +13,9 @@ use Cwd;
 use File::Temp;
 use File::Basename;
 use File::Path;
-use xCAT::Utils qw(genpassword);
+#use xCAT::Utils qw(genpassword);
+use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::SvrUtils;
 Getopt::Long::Configure("bundling");
 Getopt::Long::Configure("pass_through");
@@ -32,7 +34,7 @@ sub process_request {
    my $request = shift;
    my $callback = shift;
    my $doreq = shift;
-   my $installroot = xCAT::Utils->getInstallDir();
+   my $installroot = xCAT::TableUtils->getInstallDir();
 
    @ARGV = @{$request->{arg}};
    my $argc = scalar @ARGV;
@@ -423,7 +425,7 @@ sub copybootscript {
     my $arch = shift;
     my $profile = shift;
     my $callback = shift;
-    my @timezone = xCAT::Utils->get_site_attribute("timezone");
+    my @timezone = xCAT::TableUtils->get_site_attribute("timezone");
 
     if ( -f "$installroot/postscripts/xcatdsklspost") {
 
diff --git a/xCAT-server/lib/xcat/plugins/prescripts.pm b/xCAT-server/lib/xcat/plugins/prescripts.pm
index cebcefb0b..27bbf6931 100644
--- a/xCAT-server/lib/xcat/plugins/prescripts.pm
+++ b/xCAT-server/lib/xcat/plugins/prescripts.pm
@@ -8,6 +8,8 @@ use lib "$::XCATROOT/lib/perl";
 use strict;
 require xCAT::Table;
 require xCAT::Utils;
+require xCAT::TableUtils;
+require xCAT::ServiceNodeUtils;
 require xCAT::MsgUtils;
 use Getopt::Long;
 use Sys::Hostname;
@@ -62,12 +64,12 @@ sub preprocess_request
     Getopt::Long::Configure("bundling");
     Getopt::Long::Configure("pass_through");
     GetOptions('l'  => \$::LOCAL);
-    my $sn = xCAT::Utils->getSNformattedhash($nodes, $service, "MN");
+    my $sn = xCAT::ServiceNodeUtils->getSNformattedhash($nodes, $service, "MN");
     my @requests;
     if ($::LOCAL) { #only handle the local nodes
         #print "process local nodes: @$nodes\n";
         #get its own children only
-	my @hostinfo=xCAT::Utils->determinehostname();
+	my @hostinfo=xCAT::NetworkUtils->determinehostname();
 	my %iphash=();
 	foreach(@hostinfo) {$iphash{$_}=1;}
 
@@ -155,7 +157,7 @@ sub runbeginpre
     my $args     = $request->{arg};
     my $action=$args->[0];
     my $localhostname=hostname();
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
  
     my %script_hash=getprescripts($nodes, $action, "begin");
     foreach my $scripts (keys %script_hash) {
@@ -219,7 +221,7 @@ sub runendpre
     my $args= $request->{arg};
     my $action=$args->[0];
     my $localhostname=hostname();
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
 
     my %script_hash=getprescripts($nodes, $action, "end");
     foreach my $scripts (keys %script_hash) {
diff --git a/xCAT-server/lib/xcat/plugins/pxe.pm b/xCAT-server/lib/xcat/plugins/pxe.pm
index b8109bc54..2f507c211 100644
--- a/xCAT-server/lib/xcat/plugins/pxe.pm
+++ b/xCAT-server/lib/xcat/plugins/pxe.pm
@@ -8,12 +8,13 @@ use Socket;
 use File::Copy;
 use File::Path;
 use Getopt::Long;
-
+require xCAT::Utils;
+require xCAT::TableUtils;
 my $addkcmdlinehandled;
 my $request;
 my $callback;
 my $dhcpconf = "/etc/dhcpd.conf";
-my $globaltftpdir = xCAT::Utils->getTftpDir();
+my $globaltftpdir = xCAT::TableUtils->getTftpDir();
 #my $dhcpver = 3;
 
 my %usage = (
@@ -135,9 +136,9 @@ sub setstate {
 
   }
   if ($kern->{kcmdline} =~ /!myipfn!/) {
-      my $ipfn = xCAT::Utils->my_ip_facing($node);
+      my $ipfn = xCAT::NetworkUtils->my_ip_facing($node);
       unless ($ipfn) {
-        my @myself = xCAT::Utils->determinehostname();
+        my @myself = xCAT::NetworkUtils->determinehostname();
         my $myname = $myself[(scalar @myself)-1];
          $callback->(
                 {
@@ -316,7 +317,7 @@ sub preprocess_request {
     }
 
    #my $sent = $stab->getAttribs({key=>'sharedtftp'},'value');
-   my @entries =  xCAT::Utils->get_site_attribute("sharedtftp");
+   my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
    if ( defined($t_entry) and ($t_entry == 0 or $t_entry =~ /no/i)) {
       $req->{'_disparatetftp'}=[1];
@@ -337,7 +338,7 @@ sub preprocess_request {
 #   $sitetab->close;
 #   if ($ent and $ent->{value}) {
 #      foreach (split /,/,$ent->{value}) {
-#         if (xCAT::Utils->thishostisnot($_)) {
+#         if (xCAT::NetworkUtils->thishostisnot($_)) {
 #            my $reqcopy = {%$req};
 #            $reqcopy->{'_xcatdest'} = $_;
 #            push @requests,$reqcopy;
@@ -404,7 +405,7 @@ sub process_request {
   if ($request->{'_disparatetftp'}->[0]) { #reading hint from preprocess_command
    @nodes = ();
    foreach (@rnodes) {
-     if (xCAT::Utils->nodeonmynet($_)) {
+     if (xCAT::NetworkUtils->nodeonmynet($_)) {
         push @nodes,$_;
       } else {
         xCAT::MsgUtils->message("S", "$_: pxe netboot: stop configuration because of none sharedtftp and not on same network with its xcatmaster.");
@@ -520,7 +521,7 @@ sub process_request {
       #my $sitetab = xCAT::Table->new('site');
       #if ($sitetab) {
           #(my $ref) = $sitetab->getAttribs({key => 'dhcpsetup'}, 'value');
-          my @entries =  xCAT::Utils->get_site_attribute("dhcpsetup");
+          my @entries =  xCAT::TableUtils->get_site_attribute("dhcpsetup");
           my $t_entry = $entries[0];  
           if ( defined($t_entry) ) {
              if ($t_entry =~ /0|n|N/) { $do_dhcpsetup=0; }
diff --git a/xCAT-server/lib/xcat/plugins/rmimage.pm b/xCAT-server/lib/xcat/plugins/rmimage.pm
index 679d1a9a5..92e2aabca 100644
--- a/xCAT-server/lib/xcat/plugins/rmimage.pm
+++ b/xCAT-server/lib/xcat/plugins/rmimage.pm
@@ -11,6 +11,7 @@ use lib "$::XCATROOT/lib/perl";
 use Getopt::Long;
 use File::Path;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::DBobjUtils;
 
 Getopt::Long::Configure("bundling");
@@ -26,8 +27,8 @@ sub process_request {
    my $request = shift;
    my $callback = shift;
    my $doreq = shift;
-   my $installroot = xCAT::Utils->getInstallDir();
-   my $tftproot = xCAT::Utils->getTftpDir();
+   my $installroot = xCAT::TableUtils->getInstallDir();
+   my $tftproot = xCAT::TableUtils->getTftpDir();
 
    my $usage = "\nUsage:\n    rmimage [-h | --help]\n    rmimage [-V | --verbose] -o <OS> -a <architecture> -p <profile>\n    rmimage [-V | --verbose] imagename [--xcatde]";
 
diff --git a/xCAT-server/lib/xcat/plugins/rollupdate.pm b/xCAT-server/lib/xcat/plugins/rollupdate.pm
index 2f40a18a3..696262021 100644
--- a/xCAT-server/lib/xcat/plugins/rollupdate.pm
+++ b/xCAT-server/lib/xcat/plugins/rollupdate.pm
@@ -16,6 +16,8 @@ BEGIN
 require xCAT::NodeRange;
 require xCAT::NameRange;
 require xCAT::Table;
+require xCAT::Utils;
+require xCAT::TableUtils;
 require Data::Dumper;
 require Getopt::Long;
 require xCAT::MsgUtils;
@@ -114,7 +116,7 @@ sub preprocess_request {
         return [$req];
     }
 
-    $req->{_xcatdest} = xCAT::Utils->get_site_Master();
+    $req->{_xcatdest} = xCAT::TableUtils->get_site_Master();
     return [$req];
 }
 
@@ -279,7 +281,7 @@ sub processArgs {
 
     #  opt_t not yet supported
     if ( defined($::opt_t) ) {
-        $::test = 1;
+        #$::test = 1;
         $::TEST = 1;
        # my $rsp;
        # push @{ $rsp->{data} }, "The \'-t\' option is not yet implemented.";
@@ -1098,7 +1100,7 @@ my @rcblines;
             # for the status may run before we've had a chance to actually update it
             my $nltab = xCAT::Table->new('nodelist');
             my @nodes = split( /\,/, $nodelist );
-            xCAT::Utils->setAppStatus(\@nodes,"RollingUpdate","update_job_submitted");
+            xCAT::TableUtils->setAppStatus(\@nodes,"RollingUpdate","update_job_submitted");
             # Submit LL reservation
             my $downnodes = "-D";
             if ($::updateall){$downnodes = " ";}
@@ -1201,7 +1203,7 @@ my @rcblines;
             }
             my $nltab = xCAT::Table->new('nodelist');
             my @nodes = split( /\,/, $nodelist );
-            xCAT::Utils->setAppStatus(\@nodes,"RollingUpdate","update_job_submitted");
+            xCAT::TableUtils->setAppStatus(\@nodes,"RollingUpdate","update_job_submitted");
             my $childpid = runrollupdate( { command => ['runrollupdate'],
                                                 arg => [ 'internal','loadleveler', $ugdf ]
                                            });
@@ -2026,7 +2028,7 @@ sub runrollupdate {
 
     my $nltab = xCAT::Table->new('nodelist');
     my @nodes = split( /\,/, $hostlist );    
-    my $appstatus=xCAT::Utils->getAppStatus(\@nodes,"RollingUpdate");
+    my $appstatus=xCAT::TableUtils->getAppStatus(\@nodes,"RollingUpdate");
     foreach my $node (@nodes) {
         unless ( defined($appstatus->{$node})
                  && ( $appstatus->{$node} eq "update_job_submitted" ) )
@@ -2052,7 +2054,7 @@ sub runrollupdate {
     }
 
     # Run prescripts for this update group
-    xCAT::Utils->setAppStatus(\@nodes,"RollingUpdate","running_prescripts");
+    xCAT::TableUtils->setAppStatus(\@nodes,"RollingUpdate","running_prescripts");
     foreach my $psline ( @{ $::DATAATTRS{'prescript'} } ) {
         $psline =~ s/\$NODELIST/$hostlist/g;
         # Run the command
@@ -2082,7 +2084,7 @@ sub runrollupdate {
 
     # Shutdown the nodes
     if ( ! $skipshutdown ) {
-        xCAT::Utils->setAppStatus(\@nodes,"RollingUpdate","shutting_down");
+        xCAT::TableUtils->setAppStatus(\@nodes,"RollingUpdate","shutting_down");
         my $shutdown_cmd;
         if (xCAT::Utils->isAIX()) { $shutdown_cmd = "shutdown -F &"; }
                              else { $shutdown_cmd = "shutdown -h now &"; }
@@ -2141,7 +2143,7 @@ sub runrollupdate {
                             print RULOG localtime()." $::ug_name:  Running command \'$pwroff_cmd\' \n";
                             close (RULOG);
                         }
-                        xCAT::Utils->setAppStatus([$pnode],"RollingUpdate","shutdowntimeout_exceeded__forcing_rpower_off");
+                        xCAT::TableUtils->setAppStatus([$pnode],"RollingUpdate","shutdowntimeout_exceeded__forcing_rpower_off");
                         xCAT::Utils->runxcmd( $pwroff_cmd, $::SUBREQ, -1 );
                     } else {
                         last;
@@ -2158,7 +2160,7 @@ sub runrollupdate {
         } # end not TEST
 
         # Run out-of-band commands for this update group
-        xCAT::Utils->setAppStatus(\@nodes,"RollingUpdate","running_outofbandcmds");
+        xCAT::TableUtils->setAppStatus(\@nodes,"RollingUpdate","running_outofbandcmds");
         foreach my $obline ( @{ $::DATAATTRS{'outofbandcmd'} } ) {
             $obline =~ s/\$NODELIST/$hostlist/g;
             # Run the command
@@ -2237,9 +2239,9 @@ sub runrollupdate {
                 }
             }
 
-            xCAT::Utils->setAppStatus(\@bootnodes,"RollingUpdate","rebooting");
+            xCAT::TableUtils->setAppStatus(\@bootnodes,"RollingUpdate","rebooting");
             if ($bootindex < $numboots) {
-                xCAT::Utils->setAppStatus(\@remaining_nodes,"RollingUpdate","waiting_on_bringuporder");
+                xCAT::TableUtils->setAppStatus(\@remaining_nodes,"RollingUpdate","waiting_on_bringuporder");
             }
             if ( scalar(@rnetboot_nodes) > 0 ) {
                 my $rnb_nodelist = join( ',', @rnetboot_nodes );
@@ -2327,7 +2329,7 @@ sub runrollupdate {
                 }
                 if (@remove_res_LL) {
                     &remove_LL_reservations(\@remove_res_LL);
-                    xCAT::Utils->setAppStatus(\@remove_res_xCAT,"RollingUpdate","update_complete");
+                    xCAT::TableUtils->setAppStatus(\@remove_res_xCAT,"RollingUpdate","update_complete");
                 }
             }
             if ($not_done) {
@@ -2363,7 +2365,7 @@ sub runrollupdate {
                 print RULOG localtime()." ERROR:  bringuptimeout exceeded for the following nodes: \n";
                 print RULOG join(",",@error_nodes);
                 print RULOG "\n";
-                xCAT::Utils->setAppStatus(\@error_nodes,"RollingUpdate","ERROR_bringuptimeout_exceeded");
+                xCAT::TableUtils->setAppStatus(\@error_nodes,"RollingUpdate","ERROR_bringuptimeout_exceeded");
                 if ( @remaining_nodes ) {
                   my @leftover_nodes;
                   foreach my $rn (@remaining_nodes) {
@@ -2375,7 +2377,7 @@ sub runrollupdate {
                     print RULOG localtime()." ERROR:  bringuptimeout exceeded for some nodes in a preceding bringuporder.  The following nodes will not be powered on: \n";
                     print RULOG join(",",@leftover_nodes);
                     print RULOG "\n";
-                    xCAT::Utils->setAppStatus(\@leftover_nodes,"RollingUpdate","ERROR_bringuptimeout_exceeded_for_previous_node");
+                    xCAT::TableUtils->setAppStatus(\@leftover_nodes,"RollingUpdate","ERROR_bringuptimeout_exceeded_for_previous_node");
                   }
                 }
                 close (RULOG);
@@ -2902,7 +2904,7 @@ sub llreconfig {
        my ($sm,$rest) = split(/\./,$m);
        my $xlated_sm = $sm;
        if ( defined ($::XLATED{$sm}) ) { $xlated_sm = $::XLATED{$sm}; }
-       if (xCAT::Utils->thishostisnot($m)) {
+       if (xCAT::NetworkUtils->thishostisnot($m)) {
            push(@llnodes, $xlated_sm) unless $have{$sm}++;
        } else {
            $runlocal=1;
diff --git a/xCAT-server/lib/xcat/plugins/route.pm b/xCAT-server/lib/xcat/plugins/route.pm
index 507c58f27..3b827aad9 100644
--- a/xCAT-server/lib/xcat/plugins/route.pm
+++ b/xCAT-server/lib/xcat/plugins/route.pm
@@ -20,6 +20,8 @@ use lib "$::XCATROOT/lib/perl";
 use strict;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::NetworkUtils;
 use xCAT::MsgUtils;
 use Getopt::Long;
@@ -182,7 +184,7 @@ sub preprocess_request
 		$callback->($rsp);
 		return 1;
 	    }
-	    my @servicenodes=xCAT::Utils->getSNList();
+	    my @servicenodes=xCAT::ServiceNodeUtils->getSNList();
 
             #print "noderange=@noderange, missednodes=@missednodes, servicenodes=@servicenodes\n"; 
 
@@ -206,7 +208,7 @@ sub preprocess_request
       
             #now find out the service nodes for each node and 
             #send the request to the service node
-	    my $sn_hash = xCAT::Utils->get_ServiceNode(\@noderange, "xcat", "MN");
+	    my $sn_hash = xCAT::ServiceNodeUtils->get_ServiceNode(\@noderange, "xcat", "MN");
     
 	    # build each request for each service node
 	    foreach my $sn (keys %$sn_hash)
@@ -354,7 +356,7 @@ sub process_makeroutes {
 	    }
 	}
 	else { #this is mn, get the routes from the site table
-	    my @mnroutes = xCAT::Utils->get_site_attribute("mnroutenames");
+	    my @mnroutes = xCAT::TableUtils->get_site_attribute("mnroutenames");
 	    if ($mnroutes[0]) {
 		my @a=split(',', $mnroutes[0]);
 		my @badroutes=();
@@ -389,7 +391,7 @@ sub process_makeroutes {
 
     #now let's handle the route creatation and deletion
     my @sns=(); 
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
     while (my ($routename, $route_hash) = each(%all_routes)) {
 	if ($route_hash->{process}) {
 	    my ($gw_name, $gw_ip)=xCAT::NetworkUtils->gethostnameandip($route_hash->{gateway});
@@ -425,7 +427,7 @@ sub process_makeroutes {
 
     #not all gateways are service nodes
     my %sn_hash=();
-    my @allSN=xCAT::Utils->getAllSN();
+    my @allSN=xCAT::ServiceNodeUtils->getAllSN();
     my %allSN_hash=();
     foreach(@allSN) {$allSN_hash{$_}=1;}
     foreach my $sn (@sns) {
diff --git a/xCAT-server/lib/xcat/plugins/sinv.pm b/xCAT-server/lib/xcat/plugins/sinv.pm
index 7b189ce25..a39fb8ffd 100644
--- a/xCAT-server/lib/xcat/plugins/sinv.pm
+++ b/xCAT-server/lib/xcat/plugins/sinv.pm
@@ -15,7 +15,8 @@ package xCAT_plugin::sinv;
 use strict;
 
 require xCAT::Utils;
-
+require xCAT::TableUtils;
+require xCAT::ServiceNodeUtils;
 require xCAT::MsgUtils;
 require xCAT::SINV;
 use Getopt::Long;
@@ -86,7 +87,7 @@ sub handled_commands
 #  if ($nodes) {
 #    # find service nodes for requested nodes
 #    # build an individual request for each service node
-#    $sn = xCAT::Utils->get_ServiceNode($nodes, $service, "MN");
+#    $sn = xCAT::ServiceNodeUtils->get_ServiceNode($nodes, $service, "MN");
 #
 #    # build each request for each service node
 #
diff --git a/xCAT-server/lib/xcat/plugins/sles.pm b/xCAT-server/lib/xcat/plugins/sles.pm
index ae7e49afb..562a2645c 100644
--- a/xCAT-server/lib/xcat/plugins/sles.pm
+++ b/xCAT-server/lib/xcat/plugins/sles.pm
@@ -10,6 +10,7 @@ use Sys::Syslog;
 use File::Temp qw/tempdir/;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
 use xCAT::SvrUtils;
 use xCAT::MsgUtils;
@@ -67,13 +68,13 @@ sub mknetboot
     #if ($sitetab)
     #{
         #(my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
-        my @entries =  xCAT::Utils->get_site_attribute("installdir");
+        my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
         my $t_entry = $entries[0];
         if ( defined($t_entry) ) {
             $installroot = $t_entry;
         }
         #($ref) = $sitetab->getAttribs({key => 'xcatdport'}, 'value');
-        @entries =  xCAT::Utils->get_site_attribute("xcatdport");
+        @entries =  xCAT::TableUtils->get_site_attribute("xcatdport");
         $t_entry = $entries[0];
         if ( defined($t_entry) ) {
             $xcatdport = $t_entry;
@@ -594,7 +595,7 @@ sub mkinstall
     my $request  = shift;
     my $callback = shift;
     my $doreq    = shift;
-    my $globaltftpdir = xCAT::Utils->getTftpDir();
+    my $globaltftpdir = xCAT::TableUtils->getTftpDir();
 
     my @nodes    = @{$request->{node}};
     my $node;
@@ -624,7 +625,7 @@ sub mkinstall
     #if ($sitetab)
     #{
         #(my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
-        my @entries =  xCAT::Utils->get_site_attribute("installdir");
+        my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
         my $t_entry = $entries[0];
         if ( defined($t_entry) ) {
             $installroot = $t_entry;
@@ -1017,7 +1018,7 @@ sub mkinstall
                 );
         }
     }
-    #my $rc = xCAT::Utils->create_postscripts_tar();
+    #my $rc = xCAT::TableUtils->create_postscripts_tar();
     #if ($rc != 0)
     #{
     #    xCAT::MsgUtils->message("S", "Error creating postscripts tar file.");
@@ -1044,7 +1045,7 @@ sub copycd
     #{
         #(my $ref) = $sitetab->getAttribs({key => 'installdir'}, 'value');
         #print Dumper($ref);
-        my @entries =  xCAT::Utils->get_site_attribute("installdir");
+        my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
         my $t_entry = $entries[0];
         if ( defined($t_entry) ) {
             $installroot = $t_entry;
@@ -1381,7 +1382,7 @@ sub insert_dd () {
     my $driverupdatesrc = shift;
     my $drivers = shift;
 
-    my $install_dir = xCAT::Utils->getInstallDir();
+    my $install_dir = xCAT::TableUtils->getInstallDir();
 
     my $cmd;
     
diff --git a/xCAT-server/lib/xcat/plugins/snmove.pm b/xCAT-server/lib/xcat/plugins/snmove.pm
index b5ca6be8c..276fd230f 100644
--- a/xCAT-server/lib/xcat/plugins/snmove.pm
+++ b/xCAT-server/lib/xcat/plugins/snmove.pm
@@ -20,6 +20,8 @@ use File::Basename;
 use File::Path;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::NetworkUtils;
 use xCAT::MsgUtils;
 use xCAT::SvrUtils;
@@ -200,7 +202,7 @@ sub process_request
     {
 
         # get all the nodes that use SN1 as the primary service nodes
-        my $pn_hash = xCAT::Utils->getSNandNodes();
+        my $pn_hash = xCAT::ServiceNodeUtils->getSNandNodes();
         foreach my $snlist (keys %$pn_hash)
         {
             if (($snlist =~ /^$::SN1$/) || ($snlist =~ /^$::SN1\,/))
@@ -464,7 +466,7 @@ sub process_request
 
         if ($sn1n)
         {
-            my @ret = xCAT::Utils::toIP($sn1n);
+            my @ret = xCAT::NetworkUtils::toIP($sn1n);
             if ($ret[0]->[0] == 0)
             {
                 $sn1n_ip = $ret[0]->[1];
@@ -558,7 +560,7 @@ sub process_request
     }    # end - foreach node
 
 	# check the sharedinstall attr
-	my $sharedinstall=xCAT::Utils->get_site_attribute('sharedinstall');
+	my $sharedinstall=xCAT::TableUtils->get_site_attribute('sharedinstall');
 	chomp $sharedinstall;
 	if (!$sharedinstall) {
         $sharedinstall="no";
diff --git a/xCAT-server/lib/xcat/plugins/statelite.pm b/xCAT-server/lib/xcat/plugins/statelite.pm
index 5675ca95c..e36bf8139 100644
--- a/xCAT-server/lib/xcat/plugins/statelite.pm
+++ b/xCAT-server/lib/xcat/plugins/statelite.pm
@@ -13,6 +13,7 @@ use File::Find;
 use Cwd;
 use File::Temp;
 use xCAT::Utils qw(genpassword);
+use xCAT::TableUtils qw(get_site_attribute);
 use xCAT::SvrUtils;
 use Data::Dumper;
 Getopt::Long::Configure("bundling");
@@ -36,7 +37,7 @@ sub process_request {
 
 	#my $sitetab = xCAT::Table->new('site');
 	#my $ent = $sitetab->getAttribs({key=>'installdir'},['value']);
-        my @entries =  xCAT::Utils->get_site_attribute("installdir");
+        my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
         my $t_entry = $entries[0];
 	my $installroot = "/install";
 
diff --git a/xCAT-server/lib/xcat/plugins/switch.pm b/xCAT-server/lib/xcat/plugins/switch.pm
index 06b5f5bbd..d0d29c124 100644
--- a/xCAT-server/lib/xcat/plugins/switch.pm
+++ b/xCAT-server/lib/xcat/plugins/switch.pm
@@ -15,6 +15,8 @@ use Sys::Syslog;
 use xCAT::Usage;
 use Storable;
 use xCAT::MellanoxIB;
+require xCAT::TableUtils;
+require xCAT::ServiceNodeUtils;
 
 my $macmap;
 sub handled_commands {
@@ -84,7 +86,7 @@ sub preprocess_request {
       # find service nodes for requested switch
       # build an individual request for each service node
       my $service  = "xcat";
-      my $sn = xCAT::Utils->get_ServiceNode($noderange, $service, "MN");
+      my $sn = xCAT::ServiceNodeUtils->get_ServiceNode($noderange, $service, "MN");
       
       # build each request for each service node
       foreach my $snkey (keys %$sn)
diff --git a/xCAT-server/lib/xcat/plugins/tabutils.pm b/xCAT-server/lib/xcat/plugins/tabutils.pm
index 88d086b8d..494771850 100644
--- a/xCAT-server/lib/xcat/plugins/tabutils.pm
+++ b/xCAT-server/lib/xcat/plugins/tabutils.pm
@@ -14,6 +14,7 @@ use Data::Dumper;
 use xCAT::NodeRange qw/noderange abbreviate_noderange/;
 use xCAT::Schema;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::MsgUtils;
 use xCAT::DBobjUtils;
 use Getopt::Long;
@@ -300,7 +301,7 @@ sub noderm
     if (!$nodes) { $noderm_usage->(1); return; }
     #my $sitetab = xCAT::Table->new('site');
     #my $pdhcp = $sitetab->getAttribs({key=>'pruneservices'},['value']);
-    my @entries =  xCAT::Utils->get_site_attribute("pruneservices");
+    my @entries =  xCAT::TableUtils->get_site_attribute("pruneservices");
     my $t_entry = $entries[0];
     if ( defined($t_entry) and $t_entry !~ /n(\z|o)/i) {
         $requestcommand->({command=>['makedhcp'],node=>$nodes,arg=>['-d']});
diff --git a/xCAT-server/lib/xcat/plugins/toolscenter.pm b/xCAT-server/lib/xcat/plugins/toolscenter.pm
index 071fd50e9..a8ef36118 100644
--- a/xCAT-server/lib/xcat/plugins/toolscenter.pm
+++ b/xCAT-server/lib/xcat/plugins/toolscenter.pm
@@ -30,6 +30,7 @@ use Thread qw(yield);
 use POSIX qw(WNOHANG nice);
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::MsgUtils;
 use xCAT::SvrUtils;
 #use Data::Dumper;
@@ -64,7 +65,7 @@ sub preprocess_request
     #my $stab = xCAT::Table->new('site');
     #my $sent;
     #($sent) = $stab->getAttribs({key => 'sharedtftp'}, 'value');
-    my @entries =  xCAT::Utils->get_site_attribute("sharedtftp");
+    my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
     my $t_entry = $entries[0];
     unless (  defined($t_entry)
             and ($t_entry =~ /no/i or $t_entry =~ /0/))
@@ -140,15 +141,15 @@ sub mknetboot
     my $ostab    = xCAT::Table->new('nodetype');
     #my $sitetab  = xCAT::Table->new('site');
 
-    my $installroot = xCAT::Utils->getInstallDir();
-    my $tftpdir = xCAT::Utils->getTftpDir();
+    my $installroot = xCAT::TableUtils->getInstallDir();
+    my $tftpdir = xCAT::TableUtils->getTftpDir();
 
     my $xcatiport;
 
     #if ($sitetab)
     #{
         #(my $ref) = $sitetab->getAttribs({key => 'xcatiport'}, 'value');
-        my @entries =  xCAT::Utils->get_site_attribute("xcatiport");
+        my @entries =  xCAT::TableUtils->get_site_attribute("xcatiport");
         my $t_entry = $entries[0];
         if ( defined($t_entry) )
         {
@@ -408,7 +409,7 @@ ENDOFAWK
                       );
     }
 
-    #my $rc = xCAT::Utils->create_postscripts_tar();
+    #my $rc = xCAT::TableUtils->create_postscripts_tar();
     #if ( $rc != 0 ) {
     #	xCAT::MsgUtils->message( "S", "Error creating postscripts tar file." );
     #}
diff --git a/xCAT-server/lib/xcat/plugins/updatenode.pm b/xCAT-server/lib/xcat/plugins/updatenode.pm
index 8f7403f4d..4ebdb9454 100644
--- a/xCAT-server/lib/xcat/plugins/updatenode.pm
+++ b/xCAT-server/lib/xcat/plugins/updatenode.pm
@@ -15,6 +15,8 @@ use Data::Dumper;
 use xCAT::Utils;
 use xCAT::SvrUtils;
 use xCAT::Usage;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::NetworkUtils;
 use xCAT::InstUtils;
 use Getopt::Long;
@@ -170,7 +172,7 @@ sub preprocess_updatenode
     my $args     = $request->{arg};
     my @requests = ();
 
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
 
     # subroutine to display the usage
     sub updatenode_usage
@@ -452,7 +454,7 @@ sub preprocess_updatenode
     }
 
 
-    my $sn = xCAT::Utils->get_ServiceNode(\@nodes, "xcat", "MN");
+    my $sn = xCAT::ServiceNodeUtils->get_ServiceNode(\@nodes, "xcat", "MN");
     if ($::ERROR_RC)
     {
         my $rsp;
@@ -466,7 +468,7 @@ sub preprocess_updatenode
 
     # for security update, we need to handle the service node first
     my @good_sns = ();
-    my @MNip   = xCAT::Utils->determinehostname;
+    my @MNip   = xCAT::NetworkUtils->determinehostname;
     my @sns = ();
     foreach my $s (keys %$sn) {
 	my @tmp_a=split(',',$s);
@@ -701,7 +703,7 @@ sub updatenode
 
     # Lookup Install dir location at this Mangment Node.
     # XXX: Suppose that compute nodes has the same Install dir location.
-    my $installdir = xCAT::Utils->getInstallDir();
+    my $installdir = xCAT::TableUtils->getInstallDir();
 
     #if the postscripts directory exists then make sure it is 
     # world readable and executable by root 
@@ -1402,7 +1404,7 @@ sub doAIXcopy
     #
 
     # get a list of service nodes for this node list
-    my $sn = xCAT::Utils->get_ServiceNode(\@nodelist, "xcat", "MN");
+    my $sn = xCAT::ServiceNodeUtils->get_ServiceNode(\@nodelist, "xcat", "MN");
     if ($::ERROR_RC)
     {
         my $rsp;
@@ -2032,7 +2034,7 @@ sub updateAIXsoftware
 			# make sure pkg dir is exported
             if (scalar(@pkglist)) {
 				my $ecmd;
-                my @nfsv4 = xCAT::Utils->get_site_attribute("useNFSv4onAIX");
+                my @nfsv4 = xCAT::TableUtils->get_site_attribute("useNFSv4onAIX");
                 if ($nfsv4[0] && ($nfsv4[0] =~ /1|Yes|yes|YES|Y|y/))
                 {
                     $ecmd = qq~exportfs -i -o vers=4 $pkgdir~;
@@ -2089,7 +2091,7 @@ sub updateAIXsoftware
 
                 	# mount source dir to node
 					my $mcmd;
-					my @nfsv4 = xCAT::Utils->get_site_attribute("useNFSv4onAIX");
+					my @nfsv4 = xCAT::TableUtils->get_site_attribute("useNFSv4onAIX");
 					if ($nfsv4[0] && ($nfsv4[0] =~ /1|Yes|yes|YES|Y|y/))
 					{
 						$mcmd   = qq~mkdir -m 644 -p /xcatmnt; mount -o vers=4 $serv:$pkgdir /xcatmnt~;
@@ -2520,10 +2522,10 @@ sub updateOS {
 	my $rsp; 
 	
 	# Get install directory
-	my $installDIR = xCAT::Utils->getInstallDir();
+	my $installDIR = xCAT::TableUtils->getInstallDir();
 		
 	# Get HTTP server
-	my $http = xCAT::Utils->my_ip_facing($node);
+	my $http = xCAT::NetworkUtils->my_ip_facing($node);
 	if ( !$http ) {
 		push @{$rsp->{data}}, "$node: (Error) Missing HTTP server";
 		xCAT::MsgUtils->message("I", $rsp, $callback);
@@ -2713,7 +2715,7 @@ sub updatenodeappstat
         my $appstat = $args[0];
         my ($apps, $newstatus) = split(/=/,$appstat);
 
-        xCAT::Utils->setAppStatus(\@nodes, $apps, $newstatus);
+        xCAT::TableUtils->setAppStatus(\@nodes, $apps, $newstatus);
 
     }   
     
diff --git a/xCAT-server/lib/xcat/plugins/vbox.pm b/xCAT-server/lib/xcat/plugins/vbox.pm
index 2370e4aeb..475aded2c 100644
--- a/xCAT-server/lib/xcat/plugins/vbox.pm
+++ b/xCAT-server/lib/xcat/plugins/vbox.pm
@@ -16,7 +16,8 @@ require Sys::Hostname;
 require xCAT::Table;
 
 require xCAT::Utils;
-
+require xCAT::TableUtils;
+require xCAT::ServiceNodeUtils;
 require xCAT::MsgUtils;
 use Getopt::Long;
 1;
@@ -61,7 +62,7 @@ sub preprocess_request
 
     # find service nodes for requested nodes
     # build an individual request for each service node
-    my $sn = xCAT::Utils->get_ServiceNode($nodes, $service, "MN");
+    my $sn = xCAT::ServiceNodeUtils->get_ServiceNode($nodes, $service, "MN");
 
 	my @requests = ();
 	
diff --git a/xCAT-server/lib/xcat/plugins/vsmppxe.pm b/xCAT-server/lib/xcat/plugins/vsmppxe.pm
index f98b92fea..0e05c47f4 100644
--- a/xCAT-server/lib/xcat/plugins/vsmppxe.pm
+++ b/xCAT-server/lib/xcat/plugins/vsmppxe.pm
@@ -7,6 +7,7 @@ use File::Copy;
 use Getopt::Long;
 use xCAT::MsgUtils;
 
+use xCAT::TableUtils qw(get_site_attribute);
 my $addkcmdlinehandled;
 my $request;
 my $callback;
@@ -76,9 +77,9 @@ sub setstate {
         $kern->{kcmdline} .= " ".$kern->{addkcmdline};
   }
   if ($kern->{kcmdline} =~ /!myipfn!/) {
-      my $ipfn = xCAT::Utils->my_ip_facing($node);
+      my $ipfn = xCAT::NetworkUtils->my_ip_facing($node);
       unless ($ipfn) {
-        my @myself = xCAT::Utils->determinehostname();
+        my @myself = xCAT::NetworkUtils->determinehostname();
         my $myname = $myself[(scalar @myself)-1];
          $callback->(
                 {
@@ -254,7 +255,7 @@ sub preprocess_request {
     }
 
    #my $sent = $stab->getAttribs({key=>'sharedtftp'},'value');
-   my @entries =  xCAT::Utils->get_site_attribute("sharedtftp");
+   my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
    if ( defined($t_entry) and ($t_entry == 0 or $t_entry =~ /no/i)) {
       $req->{'_disparatetftp'}=[1];
@@ -292,7 +293,7 @@ sub process_request {
   if ($request->{'_disparatetftp'}->[0]) { #reading hint from preprocess_command
    @nodes = ();
    foreach (@rnodes) {
-     if (xCAT::Utils->nodeonmynet($_)) {
+     if (xCAT::NetworkUtils->nodeonmynet($_)) {
         push @nodes,$_;
       } else {
         xCAT::MsgUtils->message("S", "$_: vsmppxe netboot: stop configuration because of none sharedtftp and not on same network with its xcatmaster.");
@@ -414,7 +415,7 @@ sub process_request {
       #my $sitetab = xCAT::Table->new('site');
       #if ($sitetab) {
           #(my $ref) = $sitetab->getAttribs({key => 'dhcpsetup'}, 'value');
-          my @entries =  xCAT::Utils->get_site_attribute("dhcpsetup");
+          my @entries =  xCAT::TableUtils->get_site_attribute("dhcpsetup");
           my $t_entry = $entries[0];
           if (defined($t_entry)) {
              if ($t_entry =~ /0|n|N/) { $do_dhcpsetup=0; }
diff --git a/xCAT-server/lib/xcat/plugins/windows.pm b/xCAT-server/lib/xcat/plugins/windows.pm
index 2ae976c51..1492df4b9 100644
--- a/xCAT-server/lib/xcat/plugins/windows.pm
+++ b/xCAT-server/lib/xcat/plugins/windows.pm
@@ -10,6 +10,7 @@ use Sys::Syslog;
 use File::Temp qw/tempdir/;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::SvrUtils;
 use Socket;
 use xCAT::MsgUtils;
@@ -41,7 +42,7 @@ sub process_request
     my $arch     = undef;
     my $path     = undef;
     my $installroot;
-    $installroot = xCAT::Utils->getInstallDir();
+    $installroot = xCAT::TableUtils->getInstallDir();
     if ($request->{command}->[0] eq 'copycd')
     {
         return copycd($request, $callback, $doreq);
@@ -65,7 +66,7 @@ sub mkimage {
 #-If going to /audit, it's more useful than /oobe.  
 #  audit complains about incorrect password on first boot, without any login attempt
 #  audit causes a 'system preparation tool' dialog on first boot that I close
-    my $installroot = xCAT::Utils->getInstallDir();
+    my $installroot = xCAT::TableUtils->getInstallDir();
     my $request = shift;
     my $callback = shift;
     my $doreq = shift;
@@ -125,7 +126,7 @@ sub mkimage {
 }
 
 sub mkwinlinks {
-    my $installroot = xCAT::Utils->getInstallDir(); # for now put this, as it breaks for imagex
+    my $installroot = xCAT::TableUtils->getInstallDir(); # for now put this, as it breaks for imagex
     my $node = shift;
     my $ent = shift;
     my $uuid = shift;
@@ -142,7 +143,7 @@ sub mkwinlinks {
 }
 
 sub winshell {
-    my $installroot = xCAT::Utils->getInstallDir();
+    my $installroot = xCAT::TableUtils->getInstallDir();
     my $request = shift;
     my $script = "cmd";
     my @nodes    = @{$request->{node}};
@@ -208,7 +209,7 @@ ENDAPPLY
 sub mkinstall
 {
     my $installroot;
-    $installroot = xCAT::Utils->getInstallDir();
+    $installroot = xCAT::TableUtils->getInstallDir();
     my $request  = shift;
     my $callback = shift;
     my $doreq    = shift;
@@ -476,7 +477,7 @@ sub copycd
     #if ($sitetab)
     #{
         #(my $ref) = $sitetab->getAttribs({key => installdir}, value);
-        my @entries =  xCAT::Utils->get_site_attribute("installdir");
+        my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
         my $t_entry = $entries[0]; 
         if ( defined($t_entry) )
         {
diff --git a/xCAT-server/lib/xcat/plugins/xCATWorld.pm b/xCAT-server/lib/xcat/plugins/xCATWorld.pm
index 25e5a7638..fc2048717 100644
--- a/xCAT-server/lib/xcat/plugins/xCATWorld.pm
+++ b/xCAT-server/lib/xcat/plugins/xCATWorld.pm
@@ -15,7 +15,8 @@ use Sys::Hostname;
 use xCAT::Table;
 
 use xCAT::Utils;
-
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::MsgUtils;
 use Getopt::Long;
 1;
@@ -57,7 +58,7 @@ sub preprocess_request
     # find service nodes for requested nodes
     # build an individual request for each service node
     if ($nodes) {
-     $sn = xCAT::Utils->get_ServiceNode($nodes, $service, "MN");
+     $sn = xCAT::ServiceNodeUtils->get_ServiceNode($nodes, $service, "MN");
 
       # build each request for each service node
 
diff --git a/xCAT-server/lib/xcat/plugins/xcat2nim.pm b/xCAT-server/lib/xcat/plugins/xcat2nim.pm
index e53665b35..cc4031ffd 100644
--- a/xCAT-server/lib/xcat/plugins/xcat2nim.pm
+++ b/xCAT-server/lib/xcat/plugins/xcat2nim.pm
@@ -16,6 +16,8 @@ use Sys::Hostname;
 use xCAT::NodeRange;
 use xCAT::Schema;
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::NetworkUtils;
 use xCAT::DBobjUtils;
 use Data::Dumper;
@@ -107,7 +109,7 @@ sub preprocess_request
 			#   - for the nodes that were provided
 			#  -  to handle node and group objects
 			my $sn;
-			$sn = xCAT::Utils->getSNformattedhash($mynodes, $service, "MN", $type);
+			$sn = xCAT::ServiceNodeUtils->getSNformattedhash($mynodes, $service, "MN", $type);
 			foreach my $snkey (keys %$sn) {
 				my $reqcopy = {%$req};
 				$reqcopy->{node} = $sn->{$snkey};
@@ -303,7 +305,7 @@ if(0) { # only do networks on the management node (NIM primary) for now
 			@servicenodes=split(',', $::SERVERS);
 		} else {
 			# do MN and all servers
-			@servicenodes=xCAT::Utils->getAllSN();
+			@servicenodes=xCAT::ServiceNodeUtils->getAllSN();
 			push(@servicenodes, $nimprime);
 		}
 	}
diff --git a/xCAT-server/lib/xcat/plugins/xdsh.pm b/xCAT-server/lib/xcat/plugins/xdsh.pm
index 2d9f92b1c..6a3538c18 100644
--- a/xCAT-server/lib/xcat/plugins/xdsh.pm
+++ b/xCAT-server/lib/xcat/plugins/xdsh.pm
@@ -20,7 +20,8 @@ use POSIX;
 require xCAT::Table;
 
 require xCAT::Utils;
-
+require xCAT::TableUtils;
+require xCAT::ServiceNodeUtils;
 require xCAT::MsgUtils;
 use Getopt::Long;
 require xCAT::DSHCLI;
@@ -110,12 +111,12 @@ sub preprocess_request
         # find service nodes for requested nodes
         # build an individual request for each service node
         # find out the names for the Management Node
-        my @MNnodeinfo   = xCAT::Utils->determinehostname;
+        my @MNnodeinfo   = xCAT::NetworkUtils->determinehostname;
         my $MNnodename   = pop @MNnodeinfo;                  # hostname
         my @MNnodeipaddr = @MNnodeinfo;                      # ipaddresses
         $::mnname = $MNnodeipaddr[0];
         $::SNpath;    # syncfile path on the service node
-        $sn = xCAT::Utils->get_ServiceNode($nodes, $service, "MN");
+        $sn = xCAT::ServiceNodeUtils->get_ServiceNode($nodes, $service, "MN");
         my @snodes;
         my @snoderange;
 
@@ -151,7 +152,7 @@ sub preprocess_request
             {
 
                 # get the directory on the servicenode to put the  files in
-                my @syndir = xCAT::Utils->get_site_attribute("SNsyncfiledir");
+                my @syndir = xCAT::TableUtils->get_site_attribute("SNsyncfiledir");
                 if ($syndir[0])
                 {
                     $synfiledir = $syndir[0];
diff --git a/xCAT-server/lib/xcat/plugins/xen.pm b/xCAT-server/lib/xcat/plugins/xen.pm
index 3f23ff394..c8468d656 100644
--- a/xCAT-server/lib/xcat/plugins/xen.pm
+++ b/xCAT-server/lib/xcat/plugins/xen.pm
@@ -35,6 +35,8 @@ use Time::HiRes qw(gettimeofday sleep usleep);
 use xCAT::DBobjUtils;
 use Getopt::Long;
 use xCAT::SvrUtils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 
 my %runningstates;
 my $vmmaxp=64;
@@ -630,7 +632,7 @@ sub preprocess_request {
   # find service nodes for requested nodes
   # build an individual request for each service node
   my $service  = "xcat";
-  my $sn = xCAT::Utils->get_ServiceNode($noderange, $service, "MN");
+  my $sn = xCAT::ServiceNodeUtils->get_ServiceNode($noderange, $service, "MN");
 
   # build each request for each service node
 
@@ -768,7 +770,7 @@ sub process_request {
       #my $tmp;
       #if ($sitetab) {
         #($tmp)=$sitetab->getAttribs({'key'=>'vmmaxp'},'value');
-        my @entries =  xCAT::Utils->get_site_attribute("vmmaxp");
+        my @entries =  xCAT::TableUtils->get_site_attribute("vmmaxp");
         my $t_entry = $entries[0];
         if (defined($t_entry)) { $vmmaxp=$t_entry; }
       #}
@@ -819,7 +821,7 @@ sub process_request {
   #my $sitetab = xCAT::Table->new('site');
   #if ($sitetab) {
     #(my $ref) = $sitetab->getAttribs({key => 'nodestatus'}, 'value');
-    my @entries =  xCAT::Utils->get_site_attribute("nodestatus");
+    my @entries =  xCAT::TableUtils->get_site_attribute("nodestatus");
     my $t_entry = $entries[0];
     if ( defined($t_entry) ) {
        if ($t_entry =~ /0|n|N/) { $global_check=0; }
diff --git a/xCAT-server/lib/xcat/plugins/xnba.pm b/xCAT-server/lib/xcat/plugins/xnba.pm
index fe9dbde6c..9c9f17a3e 100644
--- a/xCAT-server/lib/xcat/plugins/xnba.pm
+++ b/xCAT-server/lib/xcat/plugins/xnba.pm
@@ -8,13 +8,15 @@ use File::Path;
 use xCAT::Scope;
 use xCAT::MsgUtils;
 use Getopt::Long;
+use xCAT::Utils;
+use xCAT::TableUtils;
 
 my $addkcmdlinehandled;
 my $request;
 my $callback;
 my $dhcpconf = "/etc/dhcpd.conf";
 #my $tftpdir = "/tftpboot";
-my $globaltftpdir = xCAT::Utils->getTftpDir();
+my $globaltftpdir = xCAT::TableUtils->getTftpDir();
 #my $dhcpver = 3;
 
 my %usage = (
@@ -152,7 +154,7 @@ sub setstate {
       my $ipfn = '${next-server}';#xCAT::Utils->my_ip_facing($node);
       $kern->{kcmdline} =~ s/!myipfn!/$ipfn/g;
       $elilokcmdline =~ s/!myipfn!/%N/g;
-      $ipfn = xCAT::Utils->my_ip_facing($node);
+      $ipfn = xCAT::NetworkUtils->my_ip_facing($node);
       unless ($ipfn) { $ipfn = $::XCATSITEVALS{master}; }
       if ($ipfn) {
       	$pxelinuxkcmdline =~ s/!myipfn!/$ipfn/g;
@@ -342,7 +344,7 @@ sub preprocess_request {
    #they specify no sharedtftp in site table
    #my $stab = xCAT::Table->new('site');
    #my $sent = $stab->getAttribs({key=>'sharedtftp'},'value');i
-   my @entries =  xCAT::Utils->get_site_attribute("sharedtftp");
+   my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
    if ( defined($t_entry) and ($t_entry == 0 or $t_entry =~ /no/i)) {
       $req->{'_disparatetftp'}=[1];
@@ -363,7 +365,7 @@ sub preprocess_request {
 #   $sitetab->close;
 #   if ($ent and $ent->{value}) {
 #      foreach (split /,/,$ent->{value}) {
-#         if (xCAT::Utils->thishostisnot($_)) {
+#         if (xCAT::NetworkUtils->thishostisnot($_)) {
 #            my $reqcopy = {%$req};
 #            $reqcopy->{'_xcatdest'} = $_;
 #            $reqcopy->{_xcatpreprocessed}->[0] = 1;
@@ -431,7 +433,7 @@ sub process_request {
   if ($request->{'_disparatetftp'}->[0]) { #reading hint from preprocess_command
    @nodes = ();
    foreach (@rnodes) {
-     if (xCAT::Utils->nodeonmynet($_)) {
+     if (xCAT::NetworkUtils->nodeonmynet($_)) {
         push @nodes,$_;
      } else {
         xCAT::MsgUtils->message("S", "$_: xnba netboot: stop configuration because of none sharedtftp and not on same network with its xcatmaster.");
@@ -554,7 +556,7 @@ sub process_request {
       #my $sitetab = xCAT::Table->new('site');
       #if ($sitetab) {
           #(my $ref) = $sitetab->getAttribs({key => 'dhcpsetup'}, 'value');
-          my @entries =  xCAT::Utils->get_site_attribute("dhcpsetup");
+          my @entries =  xCAT::TableUtils->get_site_attribute("dhcpsetup");
           my $t_entry = $entries[0];
           if ( defined($t_entry) ) {
              if ($t_entry =~ /0|n|N/) { $do_dhcpsetup=0; }
diff --git a/xCAT-server/lib/xcat/plugins/yaboot.pm b/xCAT-server/lib/xcat/plugins/yaboot.pm
index b05a9fd33..68f56bad6 100644
--- a/xCAT-server/lib/xcat/plugins/yaboot.pm
+++ b/xCAT-server/lib/xcat/plugins/yaboot.pm
@@ -3,6 +3,8 @@ package xCAT_plugin::yaboot;
 use Data::Dumper;
 use Sys::Syslog;
 use xCAT::Scope;
+use xCAT::Utils;
+use xCAT::TableUtils;
 use xCAT::NetworkUtils;
 use xCAT::MsgUtils;
 use File::Path;
@@ -15,7 +17,7 @@ my %normalnodes;
 my $callback;
 my $sub_req;
 my $dhcpconf = "/etc/dhcpd.conf";
-my $globaltftpdir = xCAT::Utils->getTftpDir();
+my $globaltftpdir = xCAT::TableUtils->getTftpDir();
 #my $dhcpver = 3;
 
 my %usage = (
@@ -89,7 +91,7 @@ sub setstate {
   my %nrhash = %{shift()};
   my $kern = $bphash{$node}->[0]; #$bptab->getNodeAttribs($node,['kernel','initrd','kcmdline']);
   if ($kern->{kcmdline} =~ /!myipfn!/) {
-      my $ipfn = xCAT::Utils->my_ip_facing($node);
+      my $ipfn = xCAT::NetworkUtils->my_ip_facing($node);
       unless ($ipfn) {
           my $servicenodes = $nrhash{$node}->[0];
           if ($servicenodes and $servicenodes->{servicenode}) {
@@ -97,7 +99,7 @@ sub setstate {
               foreach my $sn ( @sns ) {
                   # We are in the service node pools, print error if no facing ip.
                   if (xCAT::InstUtils->is_me($sn)) {
-                      my @myself = xCAT::Utils->determinehostname();
+                      my @myself = xCAT::NetworkUtils->determinehostname();
                       my $myname = $myself[(scalar @myself)-1];
                       $callback->(
                           {
@@ -355,7 +357,7 @@ sub preprocess_request {
    #my $stab = xCAT::Table->new('site');
   
    #my $sent = $stab->getAttribs({key=>'sharedtftp'},'value');
-   my @entries =  xCAT::Utils->get_site_attribute("sharedtftp");
+   my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
    if ( defined($t_entry)  and ($t_entry == 0 or $t_entry =~ /no/i)) {
       $req->{'_disparatetftp'}=[1];
@@ -429,7 +431,7 @@ sub process_request {
   if ($request->{'_disparatetftp'}->[0]) { #reading hint from preprocess_command
    @nodes = ();
    foreach (@rnodes) {
-     if (xCAT::Utils->nodeonmynet($_)) {
+     if (xCAT::NetworkUtils->nodeonmynet($_)) {
         push @nodes,$_;
      } else {
         xCAT::MsgUtils->message("S", "$_: yaboot netboot: stop configuration because of none sharedtftp and not on same network with its xcatmaster.");
@@ -531,7 +533,7 @@ sub process_request {
       #my $sitetab = xCAT::Table->new('site');
       #if ($sitetab) {
           #(my $ref) = $sitetab->getAttribs({key => 'dhcpsetup'}, 'value');
-          my @entries =  xCAT::Utils->get_site_attribute("dhcpsetup");
+          my @entries =  xCAT::TableUtils->get_site_attribute("dhcpsetup");
           my $t_entry = $entries[0];
           if (defined($t_entry) ) {
              if ($t_entry =~ /0|n|N/) { $do_dhcpsetup=0; }
diff --git a/xCAT-server/lib/xcat/plugins/zvm.pm b/xCAT-server/lib/xcat/plugins/zvm.pm
index 6b64afaeb..3f44928df 100644
--- a/xCAT-server/lib/xcat/plugins/zvm.pm
+++ b/xCAT-server/lib/xcat/plugins/zvm.pm
@@ -16,6 +16,8 @@ use xCAT::MsgUtils;
 use Sys::Hostname;
 use xCAT::Table;
 use xCAT::Utils;
+use xCAT::TableUtils;
+use xCAT::ServiceNodeUtils;
 use xCAT::NetworkUtils;
 use Getopt::Long;
 use strict;
@@ -80,7 +82,7 @@ sub preprocess_request {
     # Find service nodes for requested nodes
     # Build an individual request for each service node
     if ($nodes) {
-        $sn = xCAT::Utils->get_ServiceNode( $nodes, $service, "MN" );
+        $sn = xCAT::ServiceNodeUtils->get_ServiceNode( $nodes, $service, "MN" );
 
         # Build each request for each service node
         foreach my $snkey ( keys %$sn ) {
@@ -3222,13 +3224,13 @@ sub nodeSet {
     $userId =~ tr/a-z/A-Z/;
 
     # Get install directory and domain from site table
-    my @entries =  xCAT::Utils->get_site_attribute("installdir");
+    my @entries =  xCAT::TableUtils->get_site_attribute("installdir");
     my $installDir = $entries[0];
-    @entries = xCAT::Utils->get_site_attribute("domain");
+    @entries = xCAT::TableUtils->get_site_attribute("domain");
     my $domain = $entries[0];
-    @entries = xCAT::Utils->get_site_attribute("master");
+    @entries = xCAT::TableUtils->get_site_attribute("master");
     my $master = $entries[0];
-    @entries = xCAT::Utils->get_site_attribute("xcatdport");
+    @entries = xCAT::TableUtils->get_site_attribute("xcatdport");
     my $xcatdPort = $entries[0];
 
     # Get node OS, arch, and profile from 'nodetype' table
@@ -4310,7 +4312,7 @@ sub updateNode {
     $userId =~ tr/a-z/A-Z/;
 
     # Get install directory
-    my @entries = xCAT::Utils->get_site_attribute("installdir");
+    my @entries = xCAT::TableUtils->get_site_attribute("installdir");
     my $installDir = $entries[0];
 
     # Get host IP and hostname from /etc/hosts