Originally posted by: SystemAdmin
FYI - after a call to IBM (and talking to a confused person who finally got an answer from someone else), the issue is virtual ethernet adapters in an LPAR. Apparently HACMP cannot correctly identify this type of "failure" correctly when using virtual ethernet adapters, and you must use IPAT with aliases. The documentation is a bit fuzzy to me, referring to virtual ethernet as VLAN but not VLAN at the physical network level. You can also do VLANs on a P5 using virtual ethernet which is what I took it to mean. Either way, you can't really test it using ifconfig down or chdev because of the way the LPAR communicates with HACMP and HACMP will not show it as being down even though bringing down the adapter with the service IP will cause the IP to move to the standby adapter. Bringing down both adapters causes them to recover and come back online. Even worse, if you chdev them down and they come up, ifconfig shows them up but HACMP verification shows them down (still down in ODM). Without aliases (I'm just not starting testing after converting to aliases), clstat can show the service IP is up, or even service and boot are up, when all adapters are chdev'd down and no networking is active. Real irritating.
Her answer is "that's the way it works" and that a true network failure will work correctly. I'm a bit uneasy about this answer but after a couple hours on the phone and her speaking with someone else, it's the only answer I could get.