netdev - Re: [Bridge] [RFC 0/5] bridge - introduce via_phys

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Message-ID: <20100226092551.25f0e50f@nehalam>
Date:	Fri, 26 Feb 2010 09:25:51 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	"richardvoigt@...il.com" <richardvoigt@...il.com>
Cc:	Cyrill Gorcunov <gorcunov@...il.com>, netdev@...r.kernel.org,
	bridge@...ux-foundation.org
Subject: Re: [Bridge] [RFC 0/5] bridge - introduce via_phys_dev feature

On Fri, 26 Feb 2010 10:52:52 -0600
"richardvoigt@...il.com" <richardvoigt@...il.com> wrote:

> On Fri, Feb 26, 2010 at 10:18 AM, Stephen Hemminger
> <shemminger@...ux-foundation.org> wrote:
> > Looking back at this. What if the API was simpler:
> >
> > Instead of:
> >> Typical session looks like
> >>
> >> | s...@...10.0.160$ brctl addbr br0
> >> | s...@...10.0.160$ ifconfig br0 up
> >> | s...@...10.0.160$ echo 1 > /sys/class/net/bridge/br0/via_phys_dev
> >> | s...@...10.0.160$ brctl addif br0 eth0
> >> | (...waiting a bit...)
> >> | s...@...10.0.160$
> >
> > Why not:
> >  1. Setup bridge (and any other interfaces except eth0); includes bringing br0 up
> >  2. Add eth0 to bridge with new flag to inherit
> >       a. brctl addif br0 eth0 inherit
> >
> > Inherit functionality would need to move address (Ether, IP, IPv6)
> > and routes from eth0 to br0.
> > I will see about doing it as much as possible in userspace.
> 
> How about inheriting the up/down status as well, this way the bridge
> can be left down until the settings are inherited, and will come up
> with the inherited MAC address, IP address, and routing table instead
> of changing while live?

Ok.

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