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From: "Jacob S. Barrett" <jbarrett@amduat.net>
To: Ruslan Ermilov <ru@FreeBSD.org>
Date: Mon, 29 Mar 2004 09:36:49 -0800
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cc: freebsd-net@FreeBSD.org
Subject: Re: Disabling VLAN_HWTAGGING
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On Monday 29 March 2004 12:12 am, Ruslan Ermilov <ru@FreeBSD.org> wrote:
> No, this is not of course expected.  Can you add some debug printfs
> in the ng_vlan.c:ng_vlan_rcvdata() and see if it ever receives the
> VLAN tag, and if so, print its value (perhaps the tag is entered by
> a driver in a network byte order).

Bingo... I will dig around in if_nge.c to figure out where to swap the bytes.

> Well, for IP/TCP/UDP checksumming, it's possible to switch the
> corresponding bit in the interface's enabled capabilities field.
> OTOH, switching VLAN stripping on/off requires reprogramming of
> the hardware.
>
> Generally, if the hardware supports IP/TCP/UDP checksumming and
> or VLAN tag removal/insertion, it's better to use it.  We'd
> better find the root of the problem and fix it.  ;)

I agree, so now that we have found it I will try to fix it.  Thanks for your 
help.

-- 
Jacob S. Barrett
jbarrett@amduat.net
www.amduat.net

"I don't suffer from insanity, I enjoy every minute of it."