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

[Sean Clarke]

GRE keepalives are not supported.
You'd need to use some dynamic protocol , OSPF for instance, and build 
GRE tunnels based on the dynamically learned addresses (loopback for 
instance), if you want to achieve some sort of dynamic GRE tunnel.


On 2/23/09 12:52 AM, Stefan Fouant wrote:
> 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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>>      
>
>