From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pierre Ossman <pierre-list@ossman.eu>
Subject: Re: accelerated vlan gives pcap tagged packets untagged
Date: Sat, 6 Aug 2011 18:00:46 +0200
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Cc: Patrick McHardy <kaber@trash.net>,
	Pierre Ossman <drzeus-list@drzeus.cx>,
	Francois Romieu <romieu@fr.zoreil.com>, netdev@vger.kernel.org
To: Malcolm Scott <linux-netdev@malc.org.uk>
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Reviving a really old thread.

On Fri, 24 Jul 2009 17:50:26 +0100 (BST)
Malcolm Scott <linux-netdev@malc.org.uk> wrote:

> At 18:35 yesterday, Patrick McHardy wrote:
>=20
> > Malcolm Scott wrote:
> >
> >> In my case, this is manifesting as the DHCP misbehaviour which Pierre
> >> mentioned.  (ISC dhcp3d does not use libpcap, and does not query the
> >> packet socket for the VLAN tag, so it treats every VLAN's packets as f=
or
> >> the default VLAN.)
> >
> > It needs to get the VLAN tag from the auxilliary data.
>=20
> Right.  But backwards compatibility with older apps is the issue.  An app=
=20
> which doesn't go looking for a VLAN tag in the auxiliary data -- because =
it=20
> didn't have to do so prior to 2.6.28 -- will start seeing packets from al=
l=20
> VLANs rather than just the untagged ones.
>=20
> Perhaps what's actually needed is another interface which sees _just_ the=
=20
> untagged packets, e.g. eth0.0 (0 being a reserved VLAN ID meaning 'no VLA=
N',=20
> i.e. equivalent to no 802.1q tag).
>=20

Has any progress been made on this front? I'm running kernel 2.6.32 and
dhcpd 4.1.1 and that combination is still getting very upset by these
stray packages.

Rgds
--=20
     -- Pierre Ossman

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