Subject: Re: gsip sends byte-swapped vlan tags
To: Pavel Cahyna <>
From: Manuel Bouyer <>
List: tech-net
Date: 01/25/2006 19:50:57
On Wed, Jan 25, 2006 at 12:22:06PM +0100, Pavel Cahyna wrote:
> the itended effect...
> What is the purpose of hardware VLAN tagging, anyway? The performance
> impact will be rather negative, because searching the VLAN tag in the
> linear list of mbuf tags will be probably slower than simply prepending it
> to the mbuf. It also seriously limits usability of tcpdump (tcpdump sees

I can tell you that it has a positive inpact on a Alpha DS20 with a
gigabit interface; I get a 10% increase with tcpdump.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference