diff --git a/xCAT-client/sbin/dumpxCATdb b/xCAT-client/sbin/dumpxCATdb
index cee67e827..77e84847b 100644
--- a/xCAT-client/sbin/dumpxCATdb
+++ b/xCAT-client/sbin/dumpxCATdb
@@ -68,7 +68,14 @@ foreach my $table (@output)
       }
       next;
     }
-    # skip and table in the site.skiptables attribute
+    # skip ISNM tables except isnm_config 
+    if ( $table =~ /^isnm_perf/ ) {
+      if ($::DUMPVERBOSE) {
+        xCAT::MsgUtils->message("I", "Skipping $table\n");
+      }
+      next;
+    }
+    # skip any table in the site.skiptables attribute
     if (grep(/^$table$/, @skiptbls)) {  
       if ($::DUMPVERBOSE) {
         xCAT::MsgUtils->message("I", "Skipping $table\n");
diff --git a/xCAT-client/sbin/restorexCATdb b/xCAT-client/sbin/restorexCATdb
index 9f4bf5f5f..88000abe6 100644
--- a/xCAT-client/sbin/restorexCATdb
+++ b/xCAT-client/sbin/restorexCATdb
@@ -71,6 +71,14 @@ foreach my $table (@files)
            }
            next;
         }
+        # skip ISNM tables except isnm_config
+        if ( $table =~ /^isnm_perf/ ) {
+          if ($::DUMPVERBOSE) {
+            xCAT::MsgUtils->message("I", "Skipping $table\n");
+          }
+          next;
+        }
+
         # skip and table in the site.skiptables attribute
         if (@skiptbls) {
           my ($tmptable,$suffix) = split(/\./,$table);