[j-nsp] Build a GRE tunnel on VRRP routers

[Kevin Loch]

Fatiha HOUACINE wrote:
> Hi,
> 
> I would  like to configure a GRE tunnel between  two couples of VRRP
> redundant routers ,
> 
> The problem is that, I can't Use the Virtual IP  to build on the tunnel.
> 
> How can I build my GRE in this case, to detect faillure and  interact with
> the  VRRP mecanism.
> 
>  O      ______________________    O
>  VRRP   ________*GRE*__________    VRRP
>  O                                                  O

I don't think you can use the vrrp ips as tunnel endpoints but
you could setup two tunnels and use OSPF for failover.  Just make sure
you have static routes for the tunnel endpoints so the ospf learned
routes don't take down the tunnels :)

- Kevin