Synchronizing Clusters on a Wide Area Network

The synchronization network can be spread over remote sites, which makes it easier to deploy geographically distributed clustering. There are two limitations to this capability:

1. The synchronization network must guarantee no more than 100ms latency and no more than 5% packet loss.
2. The synchronization network may only include switches and hubs. No routers are allowed on the synchronization network, because routers drop Cluster Control Protocol packets.