Geographic node separation reduces the risk of total loss of voice services when one of the nodes is out of service due to a fire, flood, hurricane, building damage, and so on. Lotus Sametime Unified Telephony allows geographic separation of the cluster nodes, either in the same subnet or in different subnets.
System Specific Information
Each node has:
Six Ethernet links that are paired and bonded to support the management, signaling, and billing/CDR redundant connections from each node.Parent topic: Cluster Redundancy
A single remote administration link.
One cluster interconnect link for separation with layer-3 cluster interconnect: Because IP routing is used for the cluster interconnect signaling messages, only a single layer-3 IP connection is required. The company's WAN can be used for the cluster interconnect instead of a redundant fiber-optic link.
Geographic Separation - Nodes in Same Subnet
Geographic Separation with Layer-3 Cluster Interconnect