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Linux
Nested Virt
NIC Config

Netplan 

network:
  version: 2
  renderer: networkd

  ethernets:
    eno1:
      dhcp4: false
      addresses:
        - 192.168.0.9/24
      routes:
        - to: default
          via: 192.168.0.1
      nameservers:
        addresses: [192.168.0.1, 8.8.8.8]

    eno2:
      dhcp4: false
      optional: true

  bridges:
    br0:
      interfaces:
        - eno2
      dhcp4: false
      dhcp6: false
      optional: true
      parameters:
        stp: false
        forward-delay: 0

    br-iscsi:
      interfaces: []
      dhcp4: false
      dhcp6: false
      optional: true
      parameters:
        stp: false
        forward-delay: 0

    br-cluster:
      interfaces: []
      dhcp4: false
      dhcp6: false
      optional: true
      parameters:
        stp: false
        forward-delay: 0

Apply Netplan 

sudo netplan apply

List Machines 

virsh list --all

Commands to add to existing machines

Add iSCSI NIC 

virsh attach-interface \
  --domain HyperV01 \
  --type bridge \
  --source br-iscsi \
  --model virtio \
  --config

Add Cluster NIC 

virsh attach-interface \
  --domain HyperV01 \
  --type bridge \
  --source br-cluster \
  --model virtio \
  --config

Add iSCSI NIC if Live and Running 

virsh attach-interface \
  --domain HyperV01 \
  --type bridge \
  --source br-iscsi \
  --model virtio \
  --live \
  --config

Add Cluster NIC if Live and Running 

virsh attach-interface \
  --domain HyperV01 \
  --type bridge \
  --source br-cluster \
  --model virtio \
  --live \
  --config

Note

–live = now –config = survive reboot

After Adding verify 

ip link show br-iscsi
ip link show br-cluster

Check VM if NIC is Attached 

virsh domiflist HyperV01
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