I appologize if this has been covered but I dont see any exact hits...
We are working with our Service Provider to implement MPLS between our remote sites and main campus. We are currently using PtoP T1 in a hub and spoke model. We are running EIGRP in our entire environment.
We would like to continue to run EIGRP in our environment but the SP does not support this protocol through the cloud. I would prefer not to introduce any new routing protocols into our environment such as BGP. (I believe SP is running BGP).
I have read snippits that I can us e GRE tunnel between sites and send EIGRP routing updates via this tunnel.
Can anyone support this method or are there better alternatives? If I implement GRE, I will still need to configure static routes so GRE knows how to reach the remote sites. I also cannot find any literature on how to configure GRE tunnels and use them ONLY for routing updates. I would think sending all traffic via GRE would cause additional overhead.
I will also have a need to send Multicast traffic between sites. I have read that GRE is the way to do this. To me it seems GRE will serve dual purposes.. first to allowing Dynamic routing updates between sites and also to allow Multicast traffic.
I appreciate any comments or suggestions!