On Saturday, 02/04/2006 at 09:15 EST, Doug Griswold <[EMAIL PROTECTED]> wrote: > Sorry. I guess I didn't fully understand vipa. You could use interface > bonding to bond 2 interfaces into 1 to get redundancy.
The term "VIPA" varies in meaning according to the speaker and comes in multiple flavors: 1. Same subnet or different subnet 2. Dynamic or static Same subnet, static: When an interface fails, its IP address is assigned to one of the remaining intefaces. aka "IP takeover". It is an alias that is established only when an interface dies. Different subnet, static: An IP address is assigned to the host that is independent of the IP addresses assigned to the network interfaces. It is standard run-of-the-mill routing magic that makes it work. Different subnet, dynamic: As above, but the VIPA address(es) can move to another host in a cluster based on high availability or workload balancing neads. This is pretty much a z/OS thing. Linux also has an "add_vipa" command whose only job is to register an IP address (logic dictates it is a VIPA) in the OSA card. Channel bonding is something that occurs below the IP layer. VIPA is an IP thing. Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
