The following reply was made to PR kern/29660; it has been noted by GNATS.

From: Patrick Welche <prlw1@newn.cam.ac.uk>
To: Manuel Bouyer <bouyer@antioche.eu.org>
Cc: gnats-bugs@NetBSD.org, kern-bug-people@NetBSD.org,
	gnats-admin@NetBSD.org, netbsd-bugs@NetBSD.org
Subject: Re: kern/29660: vlans broken on bge(4)
Date: Sun, 13 Mar 2005 12:43:47 +0000

 On Sun, Mar 13, 2005 at 12:28:04PM +0100, Manuel Bouyer wrote:
 > On Sat, Mar 12, 2005 at 07:49:25PM +0000, Patrick Welche wrote:
 > > [strangely I didn't receive Manuel's comment via email, but by checking
 > > the gnats database.. Shouldn't it be sent on automatically?]
 > > 
 > > Anyway, bge(4) knows about vlans, so it doesn't have the "can't cope with
 > > the extra 4 bytes so reduce mtu" problem. Both bge and vlan interfaces
 > > are set to 1500.
 > 
 > I remember that some revisions of a chip coulnd't cope with it, but I don't
 > remember which chip this was. This is why I checked.
 
 The chip doco claims it knows all about the vlans, but if I'm the only
 one with the problem, then there must be something BCM5751 (ASIC BCM5750 A1) 
 does differently to the other chips bge supports.. Question is, how
 can I find out? (Even profiling didn't show much up..)