[Buildbot] #3183: fix network "spottiness" on new infra

[Buildbot trac]

#3183: fix network "spottiness" on new infra
---------------------+--------------------------
Reporter:  dustin    |       Owner:  verm
    Type:  defect    |      Status:  closed
Priority:  critical  |   Milestone:  sys - other
 Version:            |  Resolution:  fixed
Keywords:            |
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Comment (by verm):

 Well, I figured out why LACP wasn't working on vm1:

 {{{
 #!diff

  ifconfig_igb0="up"
 -ifconfig_igb="up"
 +ifconfig_igb1="up"
 }}}

 2nd interface wasn't being brought up...sigh.  FreeBSD wasn't indicating
 this wasn't happening so there was no way to know.

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Ticket URL: <http://trac.buildbot.net/ticket/3183#comment:43>
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