Persist uie lookup on 2 variables

Running

persist uie "$sessionid:$calling_station_id"    

Is storing the concatenation of “sessionid”, “:” and “calling_station_id” as the persistence table key. You will need to look up with the full key or change the “persistence uie” to only use a single value, like the “sessionid”

If you want to then store additional data in the session table you can use the commands;

session add    
session lookup    
session delete    

E.g.

persist uie "$sessionid"

session add uie "$sessionid" "$calling_station_id"

See the following article iRules 101 session command or the iRules wiki for more info.