diff --git a/zaza/openstack/configure/network.py b/zaza/openstack/configure/network.py
index 68965d9..55bcdf3 100755
--- a/zaza/openstack/configure/network.py
+++ b/zaza/openstack/configure/network.py
@@ -212,12 +212,23 @@ def setup_gateway_ext_port(network_config, keystone_session=None):
     else:
         net_id = None
 
+    # If we're using netplan, we need to add the new interface to the guest
+    current_release = openstack_utils.get_os_release()
+    bionic_queens = openstack_utils.get_os_release('bionic_queens')
+    if current_release >= bionic_queens:
+        logging.warn("Adding second interface for dataport to guest netplan "
+                     "for bionic-queens and later")
+        add_dataport_to_netplan = True
+    else:
+        add_dataport_to_netplan = False
+
     logging.info("Configuring network for OpenStack undercloud/provider")
     openstack_utils.configure_gateway_ext_port(
         nova_client,
         neutron_client,
         dvr_mode=network_config.get("dvr_enabled", False),
-        net_id=net_id)
+        net_id=net_id,
+        add_dataport_to_netplan=add_dataport_to_netplan)
 
 
 def run_from_cli(**kwargs):
diff --git a/zaza/openstack/utilities/openstack.py b/zaza/openstack/utilities/openstack.py
index 1c3789b..26b6aaf 100644
--- a/zaza/openstack/utilities/openstack.py
+++ b/zaza/openstack/utilities/openstack.py
@@ -55,6 +55,7 @@ import sys
 import tempfile
 import tenacity
 import urllib
+import textwrap
 
 from zaza import model
 from zaza.openstack.utilities import (
@@ -488,8 +489,67 @@ def get_admin_net(neutron_client):
             return net
 
 
+def add_interface_to_netplan(server_name, mac_address, dvr_mode=None):
+    """In guest server_name, add nic with mac_address to netplan.
+
+    :param server_name: Hostname of instance
+    :type server_name: string
+    :param mac_address: mac address of nic to be added to netplan
+    :type mac_address: string
+    :param dvr_mode: Using DVR mode or not
+    :type dvr_mode: boolean
+    """
+    if dvr_mode:
+        application_name = 'neutron-openvswitch'
+    else:
+        application_name = 'neutron-gateway'
+
+    unit_name = juju_utils.get_unit_name_from_host_name(
+        server_name, application_name)
+
+    run_cmd_nic = "ip -f link -br -o addr|grep {}".format(mac_address)
+    interface = model.run_on_unit(unit_name, run_cmd_nic)
+    interface = interface['Stdout'].split(' ')[0]
+
+    run_cmd_netplan = """sudo egrep -iR '{}|{}$' /etc/netplan/
+                        """.format(mac_address, interface)
+
+    netplancfg = model.run_on_unit(unit_name, run_cmd_netplan)
+
+    if (mac_address in str(netplancfg)) or (interface in str(netplancfg)):
+        logging.warn("mac address {} or nic {} already exists in "
+                     "/etc/netplan".format(mac_address, interface))
+        return
+    body_value = textwrap.dedent("""\
+        network:
+            ethernets:
+                {0}:
+                    dhcp4: false
+                    dhcp6: true
+                    optional: true
+                    match:
+                        macaddress: {1}
+                    set-name: {0}
+            version: 2
+    """.format(interface, mac_address))
+    logging.debug("plumb guest interface debug info:")
+    logging.debug("body_value: {}\nunit_name: {}\ninterface: {}\nmac_address:"
+                  "{}\nserver_name: {}".format(body_value, unit_name,
+                                               interface, mac_address,
+                                               server_name))
+    with tempfile.NamedTemporaryFile(mode="w") as netplan_file:
+        netplan_file.write(body_value)
+        netplan_file.flush()
+        model.scp_to_unit(unit_name, netplan_file.name,
+                          '/home/ubuntu/60-dataport.yaml', user="ubuntu")
+    run_cmd_mv = "sudo mv /home/ubuntu/60-dataport.yaml /etc/netplan/"
+    model.run_on_unit(unit_name, run_cmd_mv)
+    model.run_on_unit(unit_name, "sudo netplan apply")
+
+
 def configure_gateway_ext_port(novaclient, neutronclient,
-                               dvr_mode=None, net_id=None):
+                               dvr_mode=None, net_id=None,
+                               add_dataport_to_netplan=False):
     """Configure the neturong-gateway external port.
 
     :param novaclient: Authenticated novaclient
@@ -536,6 +596,10 @@ def configure_gateway_ext_port(novaclient, neutronclient,
             port = neutronclient.create_port(body=body_value)
             server.interface_attach(port_id=port['port']['id'],
                                     net_id=None, fixed_ip=None)
+            if add_dataport_to_netplan:
+                add_interface_to_netplan(server.name,
+                                         mac_address=port['mac_address'],
+                                         dvr_mode=dvr_mode)
     ext_br_macs = []
     for port in neutronclient.list_ports(network_id=net_id)['ports']:
         if 'ext-port' in port['name']: