[Bug 1100867] Re: Manual interface bounce (down then up again) required for interface to function

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: ifenslave-2.6 (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1100867

Title:
  Manual interface bounce (down then up again) required for interface to
  function

Status in “ifenslave-2.6” package in Ubuntu:
  Confirmed

Bug description:
  OS: Ubuntu 12.04.1 LTS
  package version: 1.1.0-19ubuntu5

  Configuring a simple 802.3ad bond as suggested in the current
  documentation results in a non-functional interface. Pinging other
  hosts works only intermittently, incoming packets to the host seem to
  make it... with a great delay.

  As a workaround I can down the interface and bring it up again and
  everything works as expected. This can be automated (as done in the
  working examples below). In the working and non-working state *ALL*
  output of 'ip route', 'ip link', 'ip addr' and 'cat
  /proc/net/bonding/bond0' are identical.

   Please advise what other information I can provide.

  /etc/network/interfaces (bad):

  auto eth0
  iface eth0 inet manual
          bond-master bond0

  auto eth1
  iface eth1 inet manual
          bond-master bond0

  auto bond0
  iface bond0 inet static
          address 10.1.3.78
          netmask 255.255.255.0
          gateway 10.1.3.1
          bond-slaves none
          bond-mode 802.3ad
          bond-miimon 100 

  /etc/network/interfaces (works fine):

  auto eth0
  iface eth0 inet manual
          bond-master bond0

  auto eth1
  iface eth1 inet manual
          bond-master bond0

  auto bond0
  iface bond0 inet static
          address 10.1.3.78
          netmask 255.255.255.0
          gateway 10.1.3.1
          bond-slaves none
          bond-mode 802.3ad
          bond-miimon 100
          up ip link set down bond0
          up ip link set up bond0
          up ip route add default via 10.1.3.1 dev bond0

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