LXC displays similar behavious in Xenial. The "solution" was to set the MTUs for all the slave interfaces, and all the interfaces within the guests, then finally set the bridge MTU, otherwise it will simply refuse. Worked fine.
Haven't yet looked into the configs to see if I can do this permanently. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1399064 Title: bridges cannot have a mtu > 1500 by themselves To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1399064/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs