Basic cookie session iRule

This should be pretty straight forward. There are literally hundreds of examples of this sort of thing in the forums if you look around a little. It's always best to use the search function or even just browse around to see if there are answers to the questions you have, as many people are working on or have worked on similar rules that can help each other with their experience.

In any event, it would look like this:

when HTTP_REQUEST {  
  set jsess [findstr [HTTP::uri] "jsessionid" 11 ";"]  
  if { $jsess != "" } {  
    persist uie $jsess  
  } else {
    pool yourPool
  }
}

hth,

-Colin