From: Szejda, Jon (SzejdaJ@EXEMPLA.ORG)
Date: Wed Jan 29 2003 - 15:48:55 EST
Usually, your Cluster has an adapter (usually an rs232 port) that acts a heartbeat path. If the network is unreachable, the machines have a way to determine that they each are still alive (thereby avoiding an unnecessary failover). I have this in a "one physical network" layout (two NIC's per machine).
Jon Szejda
SysAdmin
-----Original Message-----
From: York, Andrew [mailto:Andrew.York@TWC.STATE.TX.US]
Sent: Wednesday, January 29, 2003 1:35 PM
To: aix-l@Princeton.EDU
Subject: Re: HA question
Unfortunately there is no easy answer. It depends on how your HACMP is customized and configured. For instance, if you have multiple networks configured for failover within HACMP, you may end up with a network failover event (not necessarily a failover to the standby node). Another factor is the thresholds that are set. Even if configured for an event, the outage may not be long enough for HA to "notice" that the network is no longer there.
--Andy
W Andrew York, Manager
Unix System Administration
Texas Workforce Commission
(512) 463-2837
-----Original Message-----
From: Bill Verzal [SMTP:Bill_Verzal@BCBSIL.COM]
Sent: Wednesday, January 29, 2003 2:19 PM
To: aix-l@Princeton.EDU
Subject: HA question
Hi *,
Here is a HA question. If my network people reboot a switch (20 second outage), will HA see it as a failure and attempt to fail it over to the standby node ? Thanks, Bill.
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