monitor interval and timeout value

James, this is always a balance between ensuring the backend pool members are adequately monitored and how long it is reasonable before downing a pool member if it goes offline. Monitor too frequently to reduce time to down a pool member and you may not give the application enough time to respond to the monitors and, perhaps, unnecessarily be marked down - especially in busy times. Increase the frequency means it takes longer for the bigip to mark a pool member down and affect users. There isn't a quick answer to this one, it all depends on the app itself and its responsiveness. Don't forget the interval can be reduced, to say 1 or 2 seconds, or increased, to 15 or 30 seconds, so it does give flexibility.

Hope this helps,

N