Comment 4 for bug 1781856

Anastasia: There is no workaround for LXD containers, there is a workaround for MAAS machines but not the relevant LXD containers. This is very much still an issue for LXD containers, the networking for which is controlled entirely by juju. So I think this Invalid state is incorrect.

While there are perhaps "better" solutions (using VNF etc) its still very relevant to want to change the default gateway, it is not always just a bandaid solution depending on the environment.