doc: Updates routed nic how-to to use pass netplan config via stdin.

[markylaing]

No description provided.

[tomponline]

During my testing I discovered that the netplan config is creating link-local addresses on the VM's NIC. This prevents pinging the next-hop addresses on the host because the source address used is the link-local address and there is no return route on the host.

Lets lose the :

          link-local:
          - ipv4
          - ipv6

And instead add: on-link: true to the static routes instead.

[markylaing]

During my testing I discovered that the netplan config is creating link-local addresses on the VM's NIC. This prevents pinging the next-hop addresses on the host because the source address used is the link-local address and there is no return route on the host.

Lets lose the :

          link-local:
          - ipv4
          - ipv6

And instead add: on-link: true to the static routes instead.

Ahh I didn't catch that when I was testing it. Just to be completely certain, is the following config what we want?

    cat <<EOF | lxc config set jammy cloud-init.network-config -
    network:
      version: 2
      ethernets:
        enp5s0:
          routes:
          - to: default
            via: 169.254.0.1
            on-link: true
          - to: default
            via: fe80::1
            on-link: true
          addresses:
          - 192.0.2.2/32
          - 2001:db8::2/128
    EOF

[tomponline]

During my testing I discovered that the netplan config is creating link-local addresses on the VM's NIC. This prevents pinging the next-hop addresses on the host because the source address used is the link-local address and there is no return route on the host.
Lets lose the :

          link-local:
          - ipv4
          - ipv6

And instead add: on-link: true to the static routes instead.

Ahh I didn't catch that when I was testing it. Just to be completely certain, is the following config what we want?

    cat <<EOF | lxc config set jammy cloud-init.network-config -
    network:
      version: 2
      ethernets:
        enp5s0:
          routes:
          - to: default
            via: 169.254.0.1
            on-link: true
          - to: default
            via: fe80::1
            on-link: true
          addresses:
          - 192.0.2.2/32
          - 2001:db8::2/128
    EOF

Thats it! :)

[markylaing]

Thats it! :)

Ok done 👍