amd64/177139: igb drops ethernet ports 2 and 3

[David Robertson]

>Number:         177139
>Category:       amd64
>Synopsis:       igb drops ethernet ports 2 and 3
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Mar 20 15:40:01 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     David Robertson
>Release:        9.1
>Organization:
>Environment:
9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec  4 09:23:10 UTC 2012     root at farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
We have two Dell servers which have an Intel I350 Gig 4 way network cards.  Both servers drop igb2 and igb3 after a short time.  igb0 and igb1 have so far been stable.  We are running the latest firmware from Dell and driver version - 2.3.4.
Any help or advice on fixing this would be much appreciated.
Nothing is logged apart from the interface going down with status: no carrier
>How-To-Repeat:
Configure igb2 and/or igb3 and wait.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: