Subject: Re: [PATCH net-next v2] bridge: vlan: allow to suppress local mac install for all vlans

From: Stephen Hemminger <[email-masked]>
Date: Tue, 25 Aug 2015 17:56:27 -0700

On Tue, 25 Aug 2015 17:34:55 -0700
Nikolay Aleksandrov <[email-masked]> wrote:

> From: Nikolay Aleksandrov <[email-masked]>
> 
> This patch adds a new knob that, when enabled, allows to suppress the
> installation of local fdb entries in newly created vlans. This could
> pose a big scalability issue if we have a large number of ports and a
> large number of vlans, e.g. in a 48 port device with 2000 vlans these
> entries easily go up to 96000.
> Note that packets for these macs are still received properly because they
> are added in vlan 0 as "own" macs and referenced when fdb lookup by vlan
> results in a miss.
> Also note that vlan membership of ingress port and the bridge device
> as egress are still being correctly enforced.
> 
> The default (0/off) is keeping the current behaviour.
> 
> Based on a patch by Wilson Kok ([email-masked]).

This is getting messy, but then again the bridge seems to have become
a ghetto for a long time. I would rather see the lookup code fixed so
that the fdb was correct.