Default route (IPv4) demolished by destroying clone (gif/gre) interface

[Stefan Bethke]

Am 16.08.2006 um 10:11 schrieb Yar Tikhiy:

> On Tue, Aug 15, 2006 at 07:26:08PM +0200, Stefan Bethke wrote:
>> Am 14.08.2006 um 22:07 schrieb Darryl Yeoh:
>>
>>> While destroying gif interface, I notice it also removes IPv4
>>> default route. Has anyone else
>>> encountered this ?
>>
>> No problem on a FreeBSD 6.1-STABLE #8: Fri Jun 16 17:15:03 CEST 2006.
>                                              ^^^^^^
>>
>> You don't happen to have any devfs rules that would cause this?
>
> As a matter of fact, the issue appeared in 6-STABLE on Jul 24 and
> is still there.  Now devd(8) will invoke "/etc/pccard_ether stop"
> when any network interface is destroyed.  In turn, pccard_ether
> will flush all -inet routes if the rc.conf(5) variable  
> removable_route_flush
> is set to YES, which is its default setting.  Previously, this
> scenario would take place only when an Ethernet interface was  
> destroyed.
> The question is:  Do all the routes really need to be flushed upon
> the destruction of an interface?

Ouch. Don't ppp(8), OpenVPN etc. destroy the tun interface they're  
using when they exit?  Flushing all routes then would be rather  
harmful.  I'm glad I haven't updated to a newer -stable yet then :-)


Stefan

-- 
Stefan Bethke <stb at lassitu.de>   Fon +49 170 346 0140