network_config:
- type: ovs_user_bridge
  name: br0
  use_dhcp: false
  members:
  - type: interface
    name: nic5
- type: vlan
  vlan_id: 138
  device: br0

2025-10-23 10:30:19.573 INFO os_net_config.impl_nmstate.__dump_key_config Applying the config with nmstate
interfaces:
- ipv4:
    dhcp: false
    enabled: false
  ipv6:
    autoconf: false
    dhcp: false
    enabled: false
  name: br0
  state: up
  type: ovs-interface
- bridge:
    allow-extra-patch-ports: true
    options:
      datapath: netdev
      fail-mode: standalone
      mcast-snooping-enable: false
      rstp: false
      stp: false
    port:
    - name: enp130s0f2
    - name: br0
  name: br0
  ovs-db:
    external_ids: {}
    other_config:
      mac-table-size: 50000
  state: up
  type: ovs-bridge
- ipv4:
    dhcp: false
    enabled: false
  ipv6:
    autoconf: false
    dhcp: false
    enabled: false
  name: vlan138
  state: up
  type: vlan
  vlan:
    base-iface: br0
    id: 138

2025-10-23 10:32:26.856 ERROR os_net_config.impl_nmstate.nmstate_apply Error seen while applying the nmstate templates Device(MissingDependencies): vlan138 failed to create resources: cannot retrieve ifindex of interface br0 (Open vSwitch Interface)
2025-10-23 10:32:27.025 DEBUG os_net_config.impl_nmstate.__dump_config ----------------------------
2025-10-23 10:32:27.026 DEBUG os_net_config.impl_nmstate.__dump_config Present set of ip rules
[]

2025-10-23 10:32:27.026 DEBUG os_net_config.impl_nmstate.__dump_config ----------------------------
2025-10-23 10:32:27.026 DEBUG os_net_config.impl_nmstate.__dump_config Desired ip rules
[]

2025-10-23 10:32:27.027 INFO os_net_config.impl_nmstate.__dump_key_config ----------------------------
2025-10-23 10:32:27.027 INFO os_net_config.impl_nmstate.__dump_key_config Applying the config with nmstate
dns-resolver:
  config:
    search: []
    server: []

2025-10-23 10:32:27.589 ERROR os_net_config.impl_nmstate.apply Failure(s) occurred when applying configuration
2025-10-23 10:32:27.589 ERROR os_net_config.impl_nmstate.apply Device(MissingDependencies): vlan138 failed to create resources: cannot retrieve ifindex of interface br0 (Open vSwitch Interface)
2025-10-23 10:32:27.589 INFO os_net_config.impl_nmstate.rollback_to_initial_settings Rolling back to initial settings.
2025-10-23 10:32:27.750 INFO os_net_config.impl_nmstate.__dump_key_config ----------------------------
2025-10-23 10:32:27.750 INFO os_net_config.impl_nmstate.__dump_key_config Applying the difference to go back to initial settings 
interfaces: []
ovs-db:
  external_ids:
    hostname: compute-0
    ovn-bridge-datapath-type: netdev
    rundir: /var/run/openvswitch
    system-id: f61ae7db-0b39-4718-8708-0e8189acc19e
  other_config:
    dpdk-extra: ' -n 4'
    dpdk-init: 'true'
    dpdk-socket-limit: 4096,4096
    dpdk-socket-mem: 4096,4096
    pmd-auto-lb: 'true'
    pmd-auto-lb-improvement-threshold: '25'
    pmd-auto-lb-load-threshold: '70'
    pmd-auto-lb-rebal-interval: '2'
    pmd-cpu-mask: c0000c
    vhost-postcopy-support: 'true'

2025-10-23 10:32:28.259 ERROR os_net_config.config_provider nmstate: ***Failed to configure network_config ***
Failure(s) occurred when applying configuration
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/os_net_config/cli.py", line 648, in config_provider
    files_changed = provider.apply(cleanup=cleanup,
  File "/usr/lib/python3.9/site-packages/os_net_config/impl_nmstate.py", line 2855, in apply
    raise os_net_config.ConfigurationError(message)
os_net_config.ConfigurationError: Failure(s) occurred when applying configuration

2025-10-23 10:32:28.259 ERROR os_net_config.main nmstate: Failed to configure network_config. 
2025-10-23 10:32:28.259 WARNING os_net_config.safe_fallback fallback_config is not provided

[root@compute-0 ~]# ovs-vsctl show
bf9dfa0a-663a-4af5-a860-0e08c8da34ac
    ovs_version: "3.5.2-33.el9fdp"
[root@compute-0 ~]# ip a sh vlan138
Device "vlan138" does not exist.

[root@compute-1 ~]# ovs-vsctl show
f5fae7d2-ea5d-4859-af5d-5a05a26a8f1c
    Bridge br0
        fail_mode: standalone
        datapath_type: netdev
        Port enp130s0f2
            Interface enp130s0f2
        Port br0
            Interface br0
                type: internal
    ovs_version: "3.5.2-33.el9fdp"
[root@compute-1 ~]# ip a sh vlan138
74: vlan138@br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether f8:f2:1e:33:04:e2 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::faf2:1eff:fe33:4e2/64 scope link 
       valid_lft forever preferred_lft forever

network_config:
- type: ovs_user_bridge
  name: br0
  use_dhcp: false
  members:
  - type: interface
    name: nic5
  - type: vlan
    vlan_id: 138
    use_dhcp: false