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

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Message-ID: <20150825175627.66ca9f30@urahara>
Date:	Tue, 25 Aug 2015 17:56:27 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Nikolay Aleksandrov <razor@...ckwall.org>
Cc:	netdev@...r.kernel.org, vyasevic@...hat.com,
	toshiaki.makita1@...il.com, bridge@...ts.linux-foundation.org,
	wkok@...ulusnetworks.com, davem@...emloft.net,
	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: Re: [PATCH net-next v2] bridge: vlan: allow to suppress local mac
 install for all vlans

On Tue, 25 Aug 2015 17:34:55 -0700
Nikolay Aleksandrov <razor@...ckwall.org> wrote:

> From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
> 
> 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 (wkok@...ulusnetworks.com).


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.
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