netdev - Re: [PATCH 1/2] IPV6: remove addresses and routes when carrier is lost

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Date:	Tue, 03 Jun 2008 10:53:08 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] IPV6: remove addresses and routes when carrier is
 lost

From: Stephen Hemminger <shemminger@...tta.com>
Date: Tue, 3 Jun 2008 10:46:40 -0700

> It is not what desktop users want, that is why it is a dynamic configuration
> option via /proc/sys/net/ipv6/conf/ethX/link_detect.
> 
> But it is what a router wants. So why not allow it? Obviously, Vyatta
> users expect systems behave same as Cisco.
> 
> The problem with doing it all in user space are not impossible just more difficult:
>   * links bouncing lead to synchronization problems
>   * existing Quagga code avoids messing with "system routes" 
>   * Quagga has to be portable to Solaris/BSD etc..
> 
> More at:
> http://osdir.com/ml/network.quagga.devel/2004-08/msg00009.html

If it's a route behavioral attribute, make it as such and add
a new rtnetlink route attribute.  If it's not there, existing
behavior is maintained.

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