This is a really irritating problem. I have the similar issue a few days ago. I was totally out of mind. Then, My friend told me to visit the link https://www.belkinroutersupportnumber.com/ After visiting my problem get resolved. There was a team to support all kind of router issue.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1057558 Title: I can't add interface to router, if there is another port in non- shared network of other tenant To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1057558/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs