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maham_TR1999
Beginner

MGRE(NHRP) with multipoint to point Frame Relay

Hi Comm,

 

I'm actually getting ready for the 300-101 examn. While studying MGRE over Frame Relay. I've come a doubt which is ; If MGRE Phase 3 goal is to prevent traffic that is sent from spoke to spoke being sent to the hub, how is it possible to acomplish this if only 2 PVC exist inside the frame relay, multipoint to point? I mean, if spoke A wants to sent traffic to spoke B, it forcefully needs to send the traffic to the hub to get throught the other PVC right? Take a look at the topology example I attached.

 

I've used MGRE solution over ethernet solutions and it really works which its a broadcast multiaccess netowork.

 

Could You please get this straight for me? I've done my research and testing, unfortunately frame relay is not my best.

 

Thanks

3 REPLIES 3
Philip D'Ath
Advisor

If only physical point to point links exist via the hub then yes, spoke traffic would have to traverse the hub, regardless of how the layer 3 topology looks.

So with the previous topology only with 2 PVC, DMVPN would not work?

Yes it will still work. Just the packets will be routed via the head end for spoke to spoke communications.