Subject: Re: [PATCH 1/2] IPV4: remove addresses and routes when carrier is lost

From: Patrick McHardy <[email-masked]>
Date: Tue, 03 Jun 2008 18:03:46 +0200

Stephen Hemminger wrote:
> On Tue, 3 Jun 2008 11:05:24 -0400
> [email-masked] (Lennart Sorensen) wrote:
> 
>> On Mon, Jun 02, 2008 at 04:52:49PM -0700, Stephen Hemminger wrote:
>>> This patch adds a new configuration sysctl that causes link loss to clear
>>> FIB state in the same way as admin down. This allows for routing daemons
>>> like Quagga which have option to remove routes when carrier is lost.
>>>
>>> This has been a long standing problem with Quagga on Linux with complaints
>>> on the developers list going back to 2004. Fixing it properly, so the routing 
>>> daemon manages the RIB, and the kernel manages the FIB, requires changes to
>>> both parts.
>> Does this cover only the local route for the interface, or all routes
>> assigned staticly to the interface too?
> 
> The patch makes carrier down == interface down. So the same
> behaviour as doing 'ip link set dev eth3 down'

Can't the routing daemon simply ignore routes with a
device that has no carrier?