Re: [PATCH net-next] net: change fib behavior based on interface link status

[Hannes Frederic Sowa <hannes@stressinduktion.org>]

On Wed, Jun 3, 2015, at 20:27, Andy Gospodarek wrote:
> On Wed, Jun 03, 2015 at 11:15:55AM -0700, Scott Feldman wrote:
> > On Tue, Jun 2, 2015 at 8:07 PM, Andy Gospodarek
> > <gospo@cumulusnetworks.com> wrote:
> > > This feature is only enabled with the new sysctl set (default is off):
> > > net.core.kill_routes_on_linkdown = 1
> > 
> > One more thing, sorry.  This feature is typically implemented today in
> > user-space on a per-interface basis.  The example I'm thinking of is
> > Quagga's "link-detect" directive which goes on an interface.  Should
> > this be a bool on each interface in systcl?  That would let user not
> > enable on selected interfaces.
> That would not be my preference.
> 
> I'm willing to investigate the per-namespace support if Hannes would
> like and add switchdev support for v2, but would prefer this not become
> that granular.

Actually, this idea also came to my mind: flagging specific routes if
they are eligible to suppress if the link is down.

Bye,
Hannes