I am conducting an Exchange migration from 2007 to 2013. The client have 4 geographical site and each of those site have an Exchange CAS server on it. The sites have also DCs on each of them.
There's two types of connection between sites one is MPLS that's 50MBPs and the other is p2p that's 2mbps. Client wants to have only 2 Exchange 2013 Server with all the roles collocated on them and DAG between them.
I already have installed and configured DAG on the servers. One server is located in the Central data center and the other is located on a second geographical site that also have a disaster recovery data center.
Client wants to configure the MAPI network on Exchange 2013 to use the P2P 2mbps connection and use the MPLS 50mbps connection for the replication NIC.
The problem is that both networks MPLS and P2P have the same IP subnet, same gateway e.g. (10.1.1.0/16) but a range of those IPs are configured on the router to use the MPLS connectivity.
I have tried to add static route to the replication network to use the gateway but when trying to add a copy of a centralized database to the DAG. the DAG copies the connection over the P2P line.
Is it possible to configure this with the same subnet or do I need to have the mpls connection on a totally different network and subnet?
I would appreciate all your suggestions and I am very sorry for my terrible explanation because I am my self confused about their network topology.
I will prepare a visio diagram of the network, IPs and everything to clear everything out.