[Bug 1746246] Re: MTU setting not honoured for bridge device

[Daniel Axtens]

It looks like this is a duplicate of
https://bugs.launchpad.net/ubuntu/+source/nplan/+bug/1724895

Closing.

** Changed in: nplan (Ubuntu)
       Status: New => Invalid

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Title:
  MTU setting not honoured for bridge device

Status in nplan package in Ubuntu:
  Invalid

Bug description:
  I have the following /etc/netplan/10-bridge.yaml, based on the example
  in the netplan(5) man page.

  network:
      version: 2
      ethernets:
          br0devs:
               match:
                  name: ens[78]
               mtu: 1280
      bridges:
          br0:
              interfaces: [br0devs]
              addresses:
                  - 10.10.10.2/24

  The only other file in /etc/netplan is 50-cloud-init.yaml which only
  touches ens3.

  I expect that the MTU of the ens7 and ens8 are 1280.

  They are not:

  ubuntu at bridgevm:~$ ip l
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
  2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
      link/ether 52:54:00:5a:61:16 brd ff:ff:ff:ff:ff:ff
  3: ens7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP mode DEFAULT group default qlen 1000
      link/ether 52:54:00:b7:08:53 brd ff:ff:ff:ff:ff:ff
  4: ens8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP mode DEFAULT group default qlen 1000
      link/ether 52:54:00:60:f3:ec brd ff:ff:ff:ff:ff:ff
  5: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
      link/ether 32:86:59:06:1b:ec brd ff:ff:ff:ff:ff:ff

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: nplan 0.30
  ProcVersionSignature: User Name 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  Date: Tue Jan 30 13:35:50 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: nplan
  UpgradeStatus: No upgrade log present (probably fresh install)

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