OpenShift Assisted Installer allows customers to use the form-based input mechanism to create a bond AND specify a VLAN tag/id, but the resulting output doesn't setup networking properly due to missing bond members (slave interfaces.) Using the form-based input to create a bond without specifying a VLAN works, and specifying a VLAN without creating a bond works, but the combination of VLAN + bond doesn't work. I can provide my own YAML that creates a VLAN + bond configuration, but form-based is easier for customers and should just work.

Use the Assisted Installer's form-based input to request a bond + VLAN configuration. Inspect the ISO for the bond's member interfaces, and observe that they're not created.

1. Use the Assisted Installer's form-based input to request a bond + VLAN configuration.

2. Download the resulting discovery ISO.

3. Inspect the ISO contents looking for the bond's two member interfaces / slave interfaces. (/etc/assisted/network/host0/eth0.nmconnection & eth1.nmconnection)

$ podman run -it --rm --privileged -v $(pwd)/coreos-installer:/data quay.io/coreos/coreos-installer:release iso ignition show /data/e069c022-389f-484f-afaa-ad51b6e8ae37-discovery.iso | jq '.storage.files | .[] | .path'

...removed ~10 lines of other files...

"/etc/assisted/network/host0/bond0.101.nmconnection"
"/etc/assisted/network/host0/mac_interface.ini"

$ podman run -it --rm --privileged -v $(pwd)/coreos-installer:/data quay.io/coreos/coreos-installer:release iso ignition show /data/e069c022-389f-484f-afaa-ad51b6e8ae37-discovery.iso | jq '.storage.files | .[] | .path' 
...removed ~10 lines of other files...

"/etc/assisted/network/host0/bond0.101.nmconnection"
"/etc/assisted/network/host0/eth0.nmconnection" # <--- bond member interface
"/etc/assisted/network/host0/eth1.nmconnection" # <--- bond member interface
"/etc/assisted/network/host0/mac_interface.ini"

I was forced to provide my own YAML in order to install OpenShift in my customer's data center.

---
interfaces:          # This YAML only applies to server-1
  - name: eth0
    type: ethernet
    state: up
    mac-address: 11:11:11:11:11:11  ### Change this
    lldp:
      enabled: true
    ipv4:
      enabled: false
    ipv6:
      enabled: false

  - name: eth1
    type: ethernet
    state: up
    mac-address: 22:22:22:22:22:22  ### Change this
    lldp:
      enabled: true
    ipv4:
      enabled: false
    ipv6:
      enabled: false

  - name: bond0
    type: bond
    state: up
    link-aggregation:
      mode: active-backup      # Confirm this
      ports:
        - eth0
        - eth1
    lldp:
      enabled: true
    ipv4:
      enabled: false
    ipv6:
      enabled: false

  - name: bond0.101
    type: vlan
    state: up
    ipv4:
      enabled: true
      dhcp: false
      address:
      - ip: 10.20.30.101    ### Change this
        prefix-length: 24
    vlan:
      base-iface: bond0
      id: 101
      protocol: 802.1q

dns-resolver:
  config:
    search:
      - example.com           # Confirm this
    server:
      - 10.20.30.100   # Confirm this

routes:
  config:
    - destination: 0.0.0.0/0
      next-hop-address: 10.20.30.1      # Confirm this
      next-hop-interface: bond0.101   # Confirm this
      table-id: 254