[Bug 1668347] Re: Unable to set bridge_portpriority with networkd

[Dimitri John Ledkov]

Upstream pull request:
https://github.com/systemd/systemd/pull/5545

Sample packages with patch applied for zesty:
https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/2541

How to use:
Similar to bridge port cost, one can set [Bridge] Priority= setting in the .network file for a given ether device, e.g.:

/etc/systemd/network/10-ens3.network
[Match]
Name=ens3

[Bridge]
Priority=33

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https://bugs.launchpad.net/bugs/1668347

Title:
  Unable to set bridge_portpriority with networkd

Status in systemd package in Ubuntu:
  In Progress

Bug description:
  1. root at ubuntu:/run/systemd/network# lsb_release -rd
  Description:    Ubuntu Zesty Zapus (development branch)
  Release:        17.04

  2. root at ubuntu:/run/systemd/network# apt-cache policy systemd
  systemd:
    Installed: 232-18ubuntu1
    Candidate: 232-18ubuntu1
    Version table:
   *** 232-18ubuntu1 500
          500 http://archive.ubuntu.com/ubuntu zesty/main amd64 Packages
          100 /var/lib/dpkg/status

  3. Using a networkd config like this:

  # cat 10-netplan-eth1.network 
  [Match]
  MACAddress=52:54:00:12:34:02
  Name=eth1

  [Network]
  Bridge=br0
  LinkLocalAddressing=no
  IPv6AcceptRA=no

  [Bridge]
  Cost=50
  Priority=28

  %  cat /sys/class/net/br0/brif/eth1/priority 
  28

  
  4. %  cat /sys/class/net/br0/brif/eth1/priority 
  32

  
  When using ifupdown and /etc/network/interfaces to configure a bridge
  users are able to specify a bridge port priority:

  auto br0
  iface br0 inet static
    address 192.168.1.1
    bridge_ports eth1 eth2
    bridge_portprio eth1 28
    bridge_portprio eth2 14

  Which results in the bridge hook scripts running:

  brctl setportprio br0 eth1 28

  which is visible via:

  /sys/class/net/br0/brif/eth2/priority

  Note, networkd does not mention PortPriority under netdev Bridge section,
  however, PathCost is mentioned.  It appears networkd is missing an implementation.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: systemd 232-18ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-8.10-generic 4.10.0-rc8
  Uname: Linux 4.10.0-8-generic x86_64
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  Date: Mon Feb 27 17:11:32 2017
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-8-generic root=UUID=900c1e3f-f682-4455-949c-ebdbf60ac6f5 ro console=ttyS0
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: 1.10.1-1ubuntu1
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-i440fx-zesty
  dmi.modalias: dmi:bvnSeaBIOS:bvr1.10.1-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-zesty:cvnQEMU:ct1:cvrpc-i440fx-zesty:
  dmi.product.name: Standard PC (i440FX + PIIX, 1996)
  dmi.product.version: pc-i440fx-zesty
  dmi.sys.vendor: QEMU

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