Re: NetworkManager with multiple RA (radvd failover)

[Anders Blomdell <anders blomdell control lth se>]

On 2013-12-18 08:48, Anders Blomdell wrote:
> On 2013-12-18 00:00, Pavel Simerda wrote:
> > ----- Original Message -----
> > > From: "Dan Williams" <dcbw redhat com>
> > > To: "Anders Blomdell" <anders blomdell control lth se>
> > > Cc: networkmanager-list gnome org
> > > Sent: Tuesday, December 17, 2013 11:58:34 PM
> > > Subject: Re: NetworkManager with multiple RA (radvd failover)
> > >
> > > On Tue, 2013-12-17 at 13:26 +0100, Anders Blomdell wrote: 
> > > > Hi,
> > > >
> > > > I'm trying to implement RA failover at my site, but NetworkManager grabs
> > > > the
> > > > first RA it sees to set a (static) default route with metric 1, and then it
> > > > sits there even when the lifetime of this route has expired (and no more
> > > > RA's
> > > > from that host). Is this a bug or some feature tham I'm overlooking.
> > >
> > > Which version of NetworkManager do you have?  I  know there were some
> > > lifetime issues with previous versions of NM, but it would certainly be
> > > a bug if NetworkManager continued to leave a default route up when the
> > > router's lifetime had expired.
> >
> > The metric one suggest it's a pre-libndp version. At that time the route management was rather difficult.
> NetworkManager-0.9.8.8-2.fc19.x86_64
>
> Time to switch to fc20 now, will be back when this is done.
Ok, when running NetworkManager-0.9.9.0-22.git20131003.fc20.x86_64 default route changes
when the lifetime of a (dead) route has expired. Unfortunately that doesn't help much
since old routes to specific hosts seems to be stuck in the kernel (at least when using ping6), 
like this:

  2a00:1450:4005:808::1011 via fe80::64:1ff:fe00:2 dev eth0  proto static  metric 1 
  2a00:1450:4005:808::1013 via fe80::13:10ff:fe07:1158 dev eth0  proto static  metric 1 
  2a00:1450:4005:808::1014 via fe80::13:12ff:fe10:1311 dev eth0  proto static  metric 1 
  default via fe80::13:10ff:fe07:1158 dev eth0  proto static  metric 1024 


Where 2a00:1450:400f:800::XXXX are different incarnations of www.google.com. 

Could keepalived (VRRP) be a solution? What is everyone else using?

/Anders

-- 
Anders Blomdell                  Email: anders blomdell control lth se
Department of Automatic Control
Lund University                  Phone:    +46 46 222 4625
P.O. Box 118                     Fax:      +46 46 138118
SE-221 00 Lund, Sweden