[Bug 1565804] Re: ifup of vlan interfaces failing during networking start - RTNETLINK answers: File exists

[Andrew McDermott]

The Juju bridge script, when creating the bridge device, generally
leaves all iface options as it found them.

For example:

auto eth1.16
iface eth1.16 inet static
    address 10.245.184.100/24
    vlan-raw-device eth1
    mtu 1500
    vlan_id 16

becomes the following:

iface eth1.16 inet manual
    address 10.245.184.100/24
    vlan-raw-device eth1
    mtu 1500
    vlan_id 16

auto br-eth1.16
iface br-eth1.16 inet static
    address 10.245.184.100/24
    mtu 1500
    bridge_ports eth1.16
    bridge_stp off
    bridge_maxwait 0

Note: It doesn't propagate any bond options.

For example:

auto eth0
iface eth0 inet manual
    bond-lacp_rate slow
    bond-xmit_hash_policy layer2
    bond-miimon 100
    bond-master bond0
    mtu 1500
    bond-mode active-backup

[ skipping eth1 for clarity ]

auto bond0
iface bond0 inet dhcp
    bond-lacp_rate slow
    bond-xmit_hash_policy layer2
    bond-miimon 100
    mtu 1500
    bond-mode active-backup
    hwaddress 52:54:00:1c:f1:5b
    bond-slaves none

becomes the following when bridged:

auto eth0
iface eth0 inet manual
    bond-lacp_rate slow
    bond-xmit_hash_policy layer2
    bond-miimon 100
    bond-master bond0
    mtu 1500
    bond-mode active-backup

auto bond0
iface bond0 inet manual
    bond-lacp_rate slow
    bond-xmit_hash_policy layer2
    bond-miimon 100
    mtu 1500
    bond-mode active-backup
    hwaddress 52:54:00:1c:f1:5b
    bond-slaves none
    dns-nameservers 10.17.20.200
    dns-search maas19

auto br-bond0
iface br-bond0 inet dhcp
    mtu 1500
    hwaddress 52:54:00:1c:f1:5b
    bridge_ports bond0
    bridge_stp off
    bridge_maxwait 0
    dns-nameservers 10.17.20.200
    dns-search maas19

I generally propagated the existing options when creating the bridge
device. Should MTU be an exception now?

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Title:
  ifup of vlan interfaces failing during networking start - RTNETLINK
  answers: File exists

Status in ifupdown package in Ubuntu:
  New

Bug description:
  /e/n/i:

  auto lo
  iface lo inet loopback
      dns-nameservers 10.245.168.2
      dns-search dellstack
  auto eth0
  iface eth0 inet static
      gateway 10.245.168.1
      address 10.245.168.17/21
      dns-nameservers 10.245.168.2
      mtu 1500

  auto eth1
  iface eth1 inet manual
      mtu 1500

  auto eth1.2667
  iface eth1.2667 inet static
      address 10.245.184.20/24
      vlan-raw-device eth1
      mtu 9000
      vlan_id 2667

  output from networking startup:

  ● networking.service - Raise network interfaces
     Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
    Drop-In: /run/systemd/generator/networking.service.d
             └─50-insserv.conf-$network.conf
     Active: failed (Result: exit-code) since Mon 2016-04-04 12:14:26 UTC; 1h 33min ago
       Docs: man:interfaces(5)
    Process: 1255 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
    Process: 868 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environment --list --exclude=lo)" ] && udevadm settle (code=exited, 
   Main PID: 1255 (code=exited, status=1/FAILURE)

  Apr 04 12:14:25 reflecting-attraction systemd[1]: Starting Raise network interfaces...
  Apr 04 12:14:26 reflecting-attraction ifup[1255]: Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
  Apr 04 12:14:26 reflecting-attraction ifup[1255]: RTNETLINK answers: File exists
  Apr 04 12:14:26 reflecting-attraction ifup[1255]: Failed to bring up eth1.2667.
  Apr 04 12:14:26 reflecting-attraction systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
  Apr 04 12:14:26 reflecting-attraction systemd[1]: Failed to start Raise network interfaces.
  Apr 04 12:14:26 reflecting-attraction systemd[1]: networking.service: Unit entered failed state.
  Apr 04 12:14:26 reflecting-attraction systemd[1]: networking.service: Failed with result 'exit-code'.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ifupdown 0.8.10ubuntu1
  ProcVersionSignature: User Name 4.4.0-16.32-generic 4.4.6
  Uname: Linux 4.4.0-16-generic x86_64
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  Date: Mon Apr  4 13:42:48 2016
  SourcePackage: ifupdown
  UpgradeStatus: No upgrade log present (probably fresh install)

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