HP UX B6941-90001 - Manual (Page 508)

508 Appendix B
Administration of MC/ServiceGuard
MC/ServiceGuard and IP addresses
MC/ServiceGuard and IP addresses
One of the many useful features of MC/ServiceGuard is the ability to
assign multiple IP addresses to a single LAN interface card.
Each primary network interface card has a unique IP address. This
address is fixed to the node and is not transferable to another node. Each
package may also have a unique IP address that is associated with the
package, and is taken over by the adoptive node if control of the package
is transferred. The node that currently holds the IP address of a package
controls that package.
Portable IP Addresses
Each package may have its own hostname. The IP address of the package
points to this hostname. You must assign a unique IP address and an
optional hostname to each package. A program can then use its own
hostname as the input to gethostbyname() which will return its IP
address.