Veritas Storage Foundation 5.0 for Oracle RAC Configuration Guide Extracts for HP Serviceguard Storage Management Suite, Second Edition, May 2008

Introducing Serviceguard Extension for RAC
Cluster Volume Manager
Chapter 1
20
Port V
CVM uses port v for kernel-to-kernel communication. During specific configuration
events, certain actions require coordination across all nodes. An example of
synchronizing events is a resize operation. CVM must ensure all nodes see the new or old
size, but never a mix of size among members.
CVM also uses this port to obtain cluster membership from GAB and determine the
status of other CVM members in the cluster.