VCS requires you to setup a private network between the systems that will form part of a cluster.
During the process of setting up heartbeat connections, note that a chance for data corruption exists if a failure removes all communications between the systems and still leaves the systems running and capable of accessing shared storage.
Private network setups: two-node and four-node clusters
Click the thumbnail above to view full-sized image.
telnet
or ping
to verify communications.
LLT uses its own protocol, and does not use TCP/IP. Therefore, to ensure the private network connections are used only for LLT communication and not for TCP/IP traffic, unplumb and unconfigure the temporary addresses after testing.
The installvcs program configures the private network in the cluster during installation.
You can use network switches instead of hubs.