Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

F5-Oetti's avatar
F5-Oetti
Icon for Nimbostratus rankNimbostratus
8 years ago

Perstistance on Cookie and a secondary Cookie

Hello iRule Experts,   I am just in the migration of some old Cisco ACE4710.. and ran just into a little trouble..   At the ACE there is defined following: sticky http-cookie XXSSESSIONID MySer...
application delivery
big-ip
irules
Daniel_Varela's avatar
Daniel_Varela
Icon for Employee rankEmployee
8 years ago

This is an example of irule for universal profile persistance:

ltm rule persistence_rule {
    when HTTP_REQUEST {
if { [HTTP::header exists "SessionID"] } {
    persist uie [HTTP::header value "SessionID"]
        }
    }
when HTTP_RESPONSE {
if { [HTTP::header exists "SessionID"] } {
    persist add uie [HTTP::header value "SessionID"]
        }
    }
}

My recommendation is give a try to the standard cookie persistence in F5, are far more efficient and probable you can achieve the same functionality.