netdev - Re: [PATCH net-next 00/10] bridge: Allow keeping local FDB entries only on VLAN 0

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Message-ID: <171B368E-D819-4AA9-B343-EE1AE529F8AD@blackwall.org>
Date: Sat, 04 Oct 2025 17:31:45 +0300
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: Linus Lüssing <linus.luessing@...3.blue>
CC: Jakub Kicinski <kuba@...nel.org>, Petr Machata <petrm@...dia.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
 Simon Horman <horms@...nel.org>, Ido Schimmel <idosch@...dia.com>,
 bridge@...ts.linux.dev, mlxsw@...dia.com,
 Vladimir Oltean <vladimir.oltean@....com>, Andrew Lunn <andrew@...n.ch>,
 Jiri Pirko <jiri@...nulli.us>
Subject: Re: [PATCH net-next 00/10] bridge: Allow keeping local FDB entries only on VLAN 0

On October 4, 2025 4:19:25 PM GMT+03:00, "Linus Lüssing" <linus.luessing@...3.blue> wrote:
>On Tue, Sep 09, 2025 at 12:07:43PM +0300, Nikolay Aleksandrov wrote:
>> My 2c, it is ok to special case vlan 0 as it is illegal to use, so it can be used
>> to match on "special" entries like this.
>
>I'm probably missing some context, but why would VLAN 0 be illegal
>to use? Isn't VLAN 0 used for untagged frames with priorities? A
>priority tagged frame?
>
>Regards, Linus

Sure it is, I said it in the context of the bridge which doesn't have such support.

Cheers,
 Nik