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

Stefan Fouant sfouant at gmail.com
Sun Feb 22 18:52:48 EST 2009


I second the previous email but add that you should make sure you
enable GRE keepalives for quick resolution of downed tunnel status.

Regards,



On 2/22/09, Kevin Loch <kloch at kl.net> wrote:
> 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
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Stefan Fouant

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