Managing HP Serviceguard for Linux Ninth Edition, April 2009

NOTE: IPv6 heartbeat subnets are not
supported in a cross-subnet configuration.
NOTE: The use of a private heartbeat network
is not advisable if you plan to use Remote
Procedure Call (RPC) protocols and services. RPC
assumes that each network adapter device or I/O
card is connected to a route-able network. An
isolated or private heartbeat LAN is not
route-able, and could cause an RPC
request-reply, directed to that LAN, to time out
without being serviced.
NFS, NIS and NIS+, and CDE are examples of
RPC based applications that are frequently used.
Other third party and home-grown applications
may also use RPC services through the RPC API
libraries. If necessary, consult with the
application vendor.
STATIONARY_IP This node's IP address on each subnet that does
not carry the cluster heartbeat, but is monitored
for packages.
Cluster Configuration Planning 109