Failed to run: ip link set dev veth7e6c37ce address 11:16:3e:59:b3:71: RTNETLINK answers: Cannot assign requested address

LXD
1 
 Failed to run: ip link set dev veth7e6c37ce address 11:16:3e:59:b3:71: RTNETLINK answers: Cannot assign requested address

I am having issues changing the MAC address of containers, even when setting what seem to be a valid MAC addreses but the container no longer starts.

For example, take the mac address generated by LXD, and changing the prefix, e.g. 00:16:3e:69:fe:8b → 01:16:3e:69:fe:8b and the container can longer being started.

Mac address seems valid but it fails, why is this?

2

That MAC address actually is invalid. Generating MAC addresses isn’t as simple as picking a random number. There are reserved bits which control whether they are unicast or multicast and whether they are global or local.

The address you’re showing is a global multicast address whereas you need a global unicast address for this use.

3

Thank you, I was not aware of that.