Description
Custom bridge networks no longer need an IPv6 --subnet or entry in default-address-pools, if neither are specified the daemon will use a ULA prefix - #47853.
But, the default bridge still requires fixed-cidr-v6.
To make the default bridge less unusual - when ipv6 is set and fixed-cidr-v6 isn't, the default bridge should follow the same rules as a custom bridge.
Description
Custom bridge networks no longer need an IPv6
--subnetor entry indefault-address-pools, if neither are specified the daemon will use a ULA prefix - #47853.But, the default bridge still requires
fixed-cidr-v6.To make the default bridge less unusual - when
ipv6is set andfixed-cidr-v6isn't, the default bridge should follow the same rules as a custom bridge.