Managing HP Serviceguard for Linux, Sixth Edition, August 2006

Understanding Serviceguard Software Components
How the Network Manager Works
Chapter 3 69
Adding and Deleting Relocatable IP Addresses
When a package is started, a relocatable IP address can be added to a
specified IP subnet. When the package is stopped, the relocatable IP
address is deleted from the specified subnet. Adding and removing of
relocatable IP addresses is handled through the cmmodnet command in
the package control script, which is described in detail in the chapter
“Configuring Packages and their Services.”
IP addresses are configured only on each primary network interface
card. Multiple IP addresses on the same network card must belong to the
same IP subnet.
Load Sharing
Serviceguard allows you to configure several services into a single
package, sharing a single IP address; in that case all those services will
fail over when the package does. If you want to be able to load-balance
services (that is, move a specific service to a less loaded system when
necessary) you can do so by putting each service in its own package and
giving it a unique IP address.