Help with Persit Irule

There is a typo in your rule with "persit". You should actually see a TCL error in /var/log/ltm stating the $persist_addr variable doesn't exist.

With that updated, and a specified timeout, the rule should work as expected:

when HTTP_REQUEST {
   if { [HTTP::header exists "X-Netli-Forwarded-For"] } {
      set persist_addr [HTTP::header "X-Netli-Forwarded-For"]
   } else {
  set persist_addr [IP::client_addr]
   }
   persist uie $persist_addr 600
}

You can view the current persistence records with the following command:

watch -n1 'b persist show all'

Each time the rule is triggered and there is an existing persistence record, you should see the age timer reset to 0.

By default, on 9.2.4, it looks like (uie) persistence records are timed out after 180 seconds (without any type of persistence profile applied to the VIP). You or your app may expect persistence to be maintained for longer than the default time so you could explicitly specify the timeout.

Aaron