CISCO ACE to F5 LTM L4-payload persistence

Hi Guys,

 

I'm pretty new with f5 and currently im converting our CISCO ACE configs to a F5 Equivalent. The ACE persistence config is below

 

Sticky layer4-payload My-L4Payload_STICKY serverfarm My-Serverfarm response sticky layer4-payload offset 43 length 32 begin-pattern "(\x20|\x00\xST)"

 

I saw in some answered questions from devcentral with same issues below

 

ltm persistence hash /Common/stageHUB { app-service none defaults-from /Common/hash hash-algorithm default hash-buffer-limit 0 hash-end-pattern none hash-length 32 hash-offset 43 hash-start-pattern "(\x0020|\x0000\xST|([^\x0020 ^\x0000]\xST))" match-across-pools disabled match-across-services disabled match-across-virtuals disabled mirror disabled override-connection-limit disabled rule none timeout 14400 }

 

I havent tried the script above but can you guys explain how to come up with the value in the hash-start-pattern? thank you guys