[Bug 1078387] Re: bonded interface doesn't reliably come up after reboot

[Mark Fox]

Just did another Ubuntu 12.04 LTS install from scratch on one of the
problem machines. Installed emacs and ifenslave then set up the 4X bond.
Rebooted and all four interface came up. Rebooted again and they all
came up again. Switched to four different ports that should be
identically configured on the switch and they came up fine both
initially and after a reboot.

I'm not sure what I've done differently, but I'll be carefully comparing
my configuration to what I've uploaded here and trying to duplicate my
success on an identical machine.

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https://bugs.launchpad.net/bugs/1078387

Title:
  bonded interface doesn't reliably come up after reboot

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

Bug description:
  Ubuntu 12.04 LTS (release 12.04 according to lsb_release -rd). Machine
  has four NICs.

  Set up a four-interface bond using the method outlined at
  http://www.stgraber.org/2012/01/04/networking-in-ubuntu-12-04-lts/.
  Restarting networking shows everything working as one would expect.
  Testing shows performance and behaviour to be what you would expect of
  a bonded interface.

  After a reboot things get interesting: Sometimes none of the slave
  interfaces come up and the bond therefore fails. Sometimes one or two
  of the interfaces come up, along with the bond. Leaving the machine
  for 15 minutes or so does not make for any changes. The interfaces
  that didn't come up at boot remain down. Unplugging, then replugging,
  cables makes no difference either. Restarting networking gets things
  back in their proper state.

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