Code review comment for ~darren-birkett/cloud-init:fix-infiniband-1847114

Thanks for adding the test. "type 2" refers to network-config version:2 which is known as netplan.
There's a netplan section in that same test and a netplan renderer. However, I was wondering of the full IB hardware address is required, or would we instead only render the subset of the address that's the same size/format as MAC ?

I know that netplan won't recognize the full hardware address so we currently couldn't support IB in netplan.