Hi, Neutron external network connection to and from instances.. Problem statement. I have deployed AIO on a Virtual Machine. (Created the demo networks, flavors and images by init-runonce script.) I created a cirros instance with a demo-net instance, and the instance is spawning with 10.0.0.0/24 ips. *inside the cirros Vm I am able to ping its own ip(10.0.0.73) and 10.0.0.1 and the "public1" network gateway 10.176.17.63 .. But unable to ping the Base VM IP 10.176.17.61* Any hints how I can reach the Base VM IP 10.176.17.61 ? from 10.0.0.73 and vice versa .. What steps I missed or I am unaware of? To get the external connection/ping/access..? I have referred many documents and I am at the end of the rope, but couldn't find a solution or what the exact issue is , any guidance much appreciated... Krish. If more information is required : There are two networks by default created 1. public1. with gateway as 10.176.17.63 public1-subnet <http://10.220.0.24/project/networks/subnets/3b9e11ae-4595-4e4c-ba71-1fba20999a00/detail> 10.176.16.0/23 IPv4 10.176.17.63 2. demo-net demo-subnet <http://10.220.0.24/project/networks/subnets/80e8d33e-6276-450b-bb46-76446dca2d51/detail> 10.0.0.0/24 IPv4 10.0.0.1 These are the values given in the " kolla_ansible_venv3/share/kolla-ansible/init-runonce" script.. ################################################################################# DEMO_NET_CIDR=${DEMO_NET_CIDR:-'10.0.0.0/24'} DEMO_NET_GATEWAY=${DEMO_NET_GATEWAY:-'10.0.0.1'} DEMO_NET_DNS=${DEMO_NET_DNS:-'8.8.8.8'} ENABLE_EXT_NET=${ENABLE_EXT_NET:-1} EXT_NET_CIDR=${EXT_NET_CIDR:-'10.176.17.0/23'} EXT_NET_RANGE=${EXT_NET_RANGE:-'start=10.176.17.62,end=10.176.17.80'} EXT_NET_GATEWAY=${EXT_NET_GATEWAY:-'10.176.16.1'} ################################################################################ Demo Router: (ee6500a8-039c) <http://10.220.0.24/project/networks/ports/ee6500a8-039c-4ceb-8dc0-b37e2c3a21de/detail> - 10.176.17.63 Active External Gateway UP (bb4c9437-82fa) <http://10.220.0.24/project/networks/ports/bb4c9437-82fa-4689-b125-9edc1987c383/detail> - 10.0.0.1 Active Internal Interface UP (kolla_ansible_venv3) ubuntu@ubuntu-VM:~$ grep ^[^#] /etc/kolla/globals.yml --- workaround_ansible_issue_8743: yes config_strategy: "COPY_ALWAYS" kolla_base_distro: "ubuntu" openstack_release: "2023.1" kolla_internal_vip_address: "10.220.0.24" // a free unused IP address in 10.220.0.0/24 segment. kolla_external_vip_address: "{{ kolla_internal_vip_address }}" kolla_container_engine: docker network_interface: "ens224" /// this vNIC is with ip 10.220.0.51 and without internet - a vlan segment for internal experiments. neutron_external_interface: "ens160" // this is the vNIC with my organization dhcp leased ip 10.176.17.61 assigned and up and running neutron_plugin_agent: "openvswitch" nova_compute_virt_type: "qemu" (kolla_ansible_venv3) ubuntu@ub Strange Behaviour: When I create another instance ( Cirros) with the network selected as " public1" network, the instance is spawning the horizon dashboard showing IP as 10.176.17.70 extTestVM <http://10.220.0.24/project/instances/9e744ab1-7a21-4d55-ad03-c01d5631657a/> cirros 10.176.17.70 But inside this VM $ ip a /// lists the IP address of this VM as 169.254.198.1/16 ?? why 169.254 .198.1/16 ? It should be 10.176.17.70 right ?? What's happening ?? Confused ..