netdev - Re: [PATCH v11 nf-next 1/2] netfilter: bridge: Add conntrack double vlan and pppoe

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Message-ID: <Z_VRhgHY4KEgbg92@calendula>
Date: Tue, 8 Apr 2025 18:40:38 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: Florian Westphal <fw@...len.de>
Cc: Eric Woudstra <ericwouds@...il.com>,
	Jozsef Kadlecsik <kadlec@...filter.org>,
	Nikolay Aleksandrov <razor@...ckwall.org>,
	Ido Schimmel <idosch@...dia.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>, netfilter-devel@...r.kernel.org,
	bridge@...ts.linux.dev, netdev@...r.kernel.org
Subject: Re: [PATCH v11 nf-next 1/2] netfilter: bridge: Add conntrack double
 vlan and pppoe

On Tue, Apr 08, 2025 at 06:39:31PM +0200, Florian Westphal wrote:
> Eric Woudstra <ericwouds@...il.com> wrote:
> > This adds the capability to conntrack 802.1ad, QinQ, PPPoE and PPPoE-in-Q
> > packets that are passing a bridge.
> 
> Conntrack is l2 agnostic, so this either requires distinct
> ip addresses in the vlans/pppoe tunneled traffic or users
> need to configure connection tracking zones manually to
> ensure there are no collisions or traffic merges (i.e.,
> packet x from PPPoE won't be merged with frag from a vlan).

There are conntrack zones.