Hi, I'm trying to install openstack using tripleo on preprovisioned servers. My (desired) environment is quite simple: 1 controller and 1 compute node. Here is what I did: - Installed undercloud with 192.168.25.0/24 as a ctlplan subnet. local_ip = 192.168.25.2; undercloud_public_host=192.168.25.4; undercloud_admin_host = 192.168.25.3 - Installed 2 servers (compute and controller) with centos 8. Hardware requirements are satisfied (32 GB of ram, 100GB disk....) - Manually created user stack on compute and controller and added it to the sudoers list. - Manually Installed openstack repositories (sudo -E tripleo-repos -b ussuri current-tripleo-rdo) - Manually installed openstack required openstack packages: sudo yum install python3-heat-agent* -y Now I'd like to use 192.168.25.0/24 as "installation network" (network used by ansible) and I'm trying to configure one single nic with vlans. Please note that on all servers (undercloud included) I have 2 physical interfaces with the same name: enp1s0 and enp7s0. enp1s0 is used for a completely openstack-detached network: 192.168.2.0/24 and enp7s0 is used for 192.168.25.0/24 More precisely: Controller-0 = 192.168.25.10 Compute-0 = 192.168.25.20 Furthermore, I confirm that I can reach <local_ip> from both nodes using ping and curl (on port 8004). And I added 2 lines in /etc/hosts on undercloud: 192.168.25.10 controller-0 192.168.25.20 compute-0 Now I'm really confused about what to do. I tried with: openstack overcloud deploy --templates --disable-validations -e /usr/share/openstack-tripleo-heat-templates/environments/deployed-server-environment.yaml -e /usr/share/openstack-tripleo-heat-templates/environments/network-isolation.yaml -e /usr/share/openstack-tripleo-heat-templates/environments/net-single-nic-with-vlans.yaml -e templates/network-environment-overrides.yaml -e templates/ctlplane-assignment.yaml -e templates/nameservers.yaml -e templates/node-info.yaml -e templates/hostnamemap.yaml -n templates/network_data.yaml node-info.yaml: http://paste.openstack.org/show/796840/ hostnamemap.yaml: http://paste.openstack.org/show/796841/ network-environment-overrides.yaml: http://paste.openstack.org/show/796842/ ctlplane-assignment.yaml: http://paste.openstack.org/show/796843/ nameservers.yaml: http://paste.openstack.org/show/796844/ network_data.yaml: http://paste.openstack.org/show/796845/ How can I specify nic2 for single nic vlans without external network? Please can you provide an example with "openstack overcloud deploy" complete command? I'm reading documentation but I do not understand how to do and it's really frustrating. Thank you, Marco