Forum Discussion
Hamish
Sep 07, 2010Cirrocumulus
A system going active/standby/active is usually because of a detection of an active/active situation. That listtle toggle of active/standby/active will ensure that any ARP caches are updated with the correct info due to the gratuitous ARP's that are done as a system goes active.
On the subject of 'Preferred Active'. I'd lose it. It doesn't really work very well in my experience. In fact there's at least two scenarios that it causes problems (i.e. The 'preferred active' box always comes up active and then you get an active/active situation. Stuff like that...
In v9 if you have network failover, there's only 1 network that can be used for the HA heartbeat... Make sure you don't have problems with that link, and I would generally advise that it's on a dedicated point-to-point network (Without or without switches. But only use switches if the two boxes are out of reach with a single cable). V10 you can have multiple HB networks setup. MUCH nicer and MUCH more stable... Run (don't walk) to upgrade to v10 just for that reason IMO.
Hamish