HP StorageWorks Clustered File System 3.1.1 for Linux Installation Guide (May 2006)

Appendix B: Configure the Cluster from the Command Line 50
Select the Cluster Administrative Traffic Protocol
Specify either multicast or unicast mode. Multicast mode is
recommended; however, if your network configuration does not allow
multicast traffic through the network, you will need to use unicast mode.
Select a Fencing Method
When certain problems occur on a server (for example, hardware
problems or the loss of cluster network communications), and the server
ceases to effectively coordinate and communicate with other servers in
the cluster, Clustered File System must remove the server’s access to
filesystems to preserve data integrity. This step is called fencing.
There are two fencing methods:
• FibreChannel switch port manipulation. When a server needs to be
fenced, Clustered File System will disable the server’s access in the
FibreChannel fabric. The server must be rebooted to regain access to
the SAN.
• Web Management-Based Fencing. Clustered File System uses remote
management hardware on the server to remove its access to PSFS
filesystems. (See the HP Clustered File System Software QuickSpecs
on the HP web site for a list of supported HP ProLiant
Select a protocol for cluster administrative traffic
< OK > <Cancel>
Multicast
Unicast