Multiple iRules for one server

You can leave it as one rule or multiple. The will both execute at the same time. For example If you have when http request in each I rule both of those events have to be executed during http request. You can add a priority if you want one to execute in specific order. Be careful of irules using the same variables or selecting default pool.

If I may add, iRules look like scripts but they're actually "compiled" when updated. This compilation optimizes the events and commands, as much as possible, for optimal runtime. Should you have multiple iRules applied to a VIP, they are effectively combined. If you have multiple iRules applied to a VIP that have the same events, those events are also combined. You would use the priority option in the event declaration to specify the order of commands within the single compiled event.

 

 

As J states, with multiple iRules you should to be mindful of both the order of events and commands, and when variables are both created and used (ie. don't try to use a variable in one iRule that hasn't yet been created by another).