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tripleo - cannot access external network

I am deploying Openstack via tripleo to one controller and one compute node from the undercloud. The installation completes successfully and the horizon dashboard is given an external IP but I am not able to access this. Nor am i able to ping the IP from the undercloud node. I believe everything from the network side is setup correctly and I appear to have followed the steps correctly. However, the default route is showing as the undercloud which i believe is incorrect as the undercloud should not be required for networking for the overcloud?

[heat-admin@overcloud-controller-0 ~]$ ip route show default via dev enp2s0f1

Deploy command (one of many different variations tried)

openstack overcloud deploy --templates /home/stack/generated-openstack-tripleo-heat-templates \ -e /home/stack/templates/node-info.yaml \ -n /home/stack/templates/network_data.yaml \ -e /home/stack/generated-openstack-tripleo-heat-templates/environments/network-isolation.yaml \ -e /home/stack/generated-openstack-tripleo-heat-templates/environments/network-environment.yaml \ -e /home/stack/generated-openstack-tripleo-heat-templates/environments/net-single-nic-with-vlans.yaml \ --ntp-server

Can anyone point me in the right direction? Openstack version is Queens on CentOS.