Anycast with DMVPN using EIGRP

First, the topology. Huge geographical area..

2 Central DataCentres, one north, one south, part of the same LAN.

Hundreds of spokes.. some are north, some are south, with 2 tunnels each defined to the Hubs. Spoke to spoke, or spoke to "superspoke" comes up as required.

4 regional "super" spokes, where we host some services like DNS, NTP to the local spoke sites. Currently with failover designated to the DCs.

So, for something like infoblox, we would have appliances in the 2 DC,s and at the 4 regional superspokes. Since we're using DMVPN, all the hops look like one to routing..

​

I have been mulling this over, and I don't think I can reasonably make an anycast type service work because the spokes in the NE wouldn't have any good metric to prefer to NE "superspoke", vs picking a DC hub or any other superspoke. Since the desire is to keep the latency down first as the network covers a huge geographical region... I'm at a bit of a loss.

​

Any suggestions, or is this not the right hammer for this particular nail?

​

​