Our company has decided to migrate from Exchange 2003 to Exchange 2007 messaging system. The network requirements of Exchange 2007 high availability cluster (Continuous cluster replication)as below:
The private network connections between cluster nodes must appear as a single, non-routed LAN .In this case, the connections network must be able to provide a guaranteed, maximum round-trip latency between nodes of no more than 500 milliseconds. The Cluster Interconnect must appear as a standard LAN.
We have no problem in getting round trip delay of not more than 500ms. But we need to explore the possible ways to provide single IP subnet over inter sites for cluster requirements.
Does IRB (Integrated Routing and bridging) help??? Or Which other WAN technology provides same IP subnet between two geologically separates sites?