Managing Serviceguard Seventeenth Edition, First Reprint December 2009

subnet on another node (that is, each heartbeat
path must be physically separate). See
“Cross-Subnet Configurations” (page 41) for
more information.
NOTE: Limitations:
• Because Veritas Cluster File System from
Symantec (CFS) requires link-level traffic
communication (LLT) among the nodes,
Serviceguard cannot be configured in
cross-subnet configurations with CFS alone.
But CFS is supported in specific cross-subnet
configurations with Serviceguard and HP
add-on products; see the documentation
listed under “Cross-Subnet Configurations”
(page 41) for more information.
• IPv6 heartbeat subnets are not supported in
a cross-subnet configuration.
Considerations for CVM:
• For Veritas CVM 4.1 or later, multiple
heartbeats are permitted, and you must
configure either multiple heartbeat subnets
or a single heartbeat subnet with a standby.
HP recommends multiple heartbeats.
• You cannot change the heartbeat
configuration while a cluster that uses CVM
is running.
• You cannot use an IPv6 heartbeat subnet
with CVM or CFS.
150 Planning and Documenting an HA Cluster