netdev - Re: [PATCH 1/3] bridge: preserve random init MAC address

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Message-ID: <5328ED25.1040900@lab.ntt.co.jp>
Date:	Wed, 19 Mar 2014 10:04:37 +0900
From:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kvm@...r.kernel.org, xen-devel@...ts.xenproject.org,
	Stephen Hemminger <stephen@...workplumber.org>,
	bridge@...ts.linux-foundation.org
Subject: Re: [PATCH 1/3] bridge: preserve random init MAC address

(2014/03/19 9:50), Luis R. Rodriguez wrote:
> On Tue, Mar 18, 2014 at 5:42 PM, Toshiaki Makita
> <makita.toshiaki@....ntt.co.jp> wrote:
>> nit,
>> If the last detached port happens to have the same addr as
>> random_init_addr, this seems to call br_stp_change_bridge_id() even
>> though bridge_id is not changed.
> 
> Ah good point.
> 
>> Shouldn't the assignment of random_init_addr be done before the check of
>> "no change"?
> 
> Good question, should we even allow two ports to have the same MAC
> address or should we complain and refuse to add it? If so that should
> mean we should also have to monitor any manual address changes or
> events for address changes on the ports.

This was recently discussed by Stephen and me.
I'm thinking it should be allowed.

http://marc.info/?l=linux-netdev&m=139182743919257&w=2

Toshiaki Makita

> 
> Stephen?
> 
>   Luis
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