This looks a lot like bug 1738998; there's a lot of non-compliant DHCP servers that are unable to deal with using a unique identified for Client Identifier, or pre-existing configuration that has yet to be updated.
The relevant RFC is 4361 [1]; it is meant to address the issues of replacing network hardware leading to losing a lease and any related configuration. [1] https://www.rfc-editor.org/rfc/rfc4361.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1752142 Title: netplan's networkd renderer supports neither MAC address DHCP nor SendHostname To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nplan/+bug/1752142/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
