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Date:      Fri, 26 Mar 2004 01:45:27 +0200
From:      Ruslan Ermilov <ru@freebsd.org>
To:        "Jacob S. Barrett" <jbarrett@amduat.net>
Cc:        freebsd-net@freebsd.org
Subject:   Re: Disabling VLAN_HWTAGGING
Message-ID:  <20040325234527.GC85417@ip.net.ua>
In-Reply-To: <200403251118.40718.jbarrett@amduat.net>
References:  <200403251118.40718.jbarrett@amduat.net>

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On Thu, Mar 25, 2004 at 11:18:40AM -0800, Jacob S. Barrett wrote:
> Can you disable VLAN_HWTAGGING?
>=20
Not without modifying if_nge.c, but it should be pretty trivial.

> I am seeing very strange behavior on a if_nge card with VLANs.  If i try =
and=20
> connect an if_vlan to it the kernel panics.  If I connect a ng_vlan to it=
=20
> tcpdump show that the tagged frames are "leaving" the if_nge interface, b=
ut=20
> tcpdump running on a remote host that is crossed over (if_em) show no fra=
mes=20
> leaving the if_nge.
>=20
ng_vlan(4) doesn't provide support for hardware VLAN tagging for output
frames -- it always emits ETHERTYPE_VLAN type Ethernet frames.

> I am wondering if it is something to do VLAN_HWTAGGING.  The if_em cards =
I=20
> have don't do it and work fine, but the if_nge cards don't work at all.
>=20
What FreeBSD version you're seeing the panic on?


Cheers,
--=20
Ruslan Ermilov
FreeBSD committer
ru@FreeBSD.org

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