Fallback Persistence Profile - how it works

Hi,

 

I don't know if this is bug or correct behavior - tested on 11.2.0

 

Setup:

 

• VS with
  • Default Persistence Profile: cookie insert
  • Fallback Persistence Profile: source address

Result:

 

• First request from client (without cookie):
  • Set-Cookie header in response setting BIGipServer... cookie
  • Persistence Record (PR) created - makes sense because there was no cookie in client request
• Second request from client
  • Cookie send in request
  • PR timeout refreshed - could be OK as PR exists matching client IP but because Cookie is provided why it's used?
• Third request - after PR was manually deleted
  • Cookie send in request
  • PR record created

Why PR is recreated when cookie exists? Which persistence is in fact used - cookie or source address?

 

Piotr