amd64/88485: em(4) problem

Danny Braniss danny at
Fri Nov 4 03:50:17 PST 2005

>Number:         88485
>Category:       amd64
>Synopsis:       em(4) problem
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-amd64
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Nov 04 11:50:15 GMT 2005
>Originator:     Danny Braniss
>Release:        FreeBSD 6.0-STABLE amd64
System: FreeBSD cs4 6.0-STABLE FreeBSD 6.0-STABLE #20: Thu Nov 3 13:06:27 IST 2005 danny at x-dev:/r+d/obj/x-dev/amd64/r+d/6.0/src/sys/HUJI amd64

	The motherboard is an Intel SE7320VP2, when booting diskless
	via PXE, it will porceed as far having to mount root via NFS,
	at which point, it gets stuck sending GETATTR packet but not seeing
	the answer from the server. Increasing the length of the ethernet
	cable (cat 5) overcomes the problem. This problem has been seen
	on three such motherboards.
	Booting an i32 kernel works fine.

	using a longer cat-5 cable

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