I have this too on 25.10. In my /etc/NetworkManager/system-connections I have a connection with.
[ipv6] addr-gen-mode=eui64 ip6-privacy=0 method=auto token=::d4bc:4cff:ae34:14a1 This fails to migrate when installing network-manager. Error: Failed to modify connection 'Bridge connection 1': failed to update connection: netplan: YAML translation failed: Error in network definition: bridge0: ipv6-address-generation and ipv6-address-token are mutually exclusive Even tried to unset this via nmcli to get the migration to happen. nmcli> remove ipv6.addr-gen-mode nmcli> save Error: connection verification failed: ipv6.token: only makes sense with EUI64 address generation mode You may try running 'verify fix' to fix errors. nmcli> verify fix Verify connection: ipv6.token: only makes sense with EUI64 address generation mode The error cannot be fixed automatically. nmcli> save Error: connection verification failed: ipv6.token: only makes sense with EUI64 address generation mode You may try running 'verify fix' to fix errors. nmcli> print , and of course nmcli is correct, ipv6.token setting only makes sense with EUI64 set ipv6.addr-gen-mode. I'd have thought the opposite of the netplan migration error, surely ipv6-address-generation and ipv6-address-token are both required. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2056217 Title: nmcli regression: can't set IPV6 token To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/2056217/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
