Persistence Question

Hello, I did some searching and was not able to find anything that would clearify how presistence is handled between 2 pairs of F5 LTM's and snat addresses.

Config:

External client (Source) ->F5 LTM pair with snat addr (LTM1) -> apache pair (PRX) -> F5 pair with snat addr (LTM2) -> application server pair (APP)

Below are 2 presistence profiles I'm interested in:

• Cookie persistence

   

  Cookie persistence uses an HTTP cookie stored on a client's computer to allow the client to reconnect to the same server previously visited at a web site.

• Source address affinity persistence

   

  Also known as simple persistence, source address affinity persistence supports TCP and UDP protocols, and directs session requests to the same server based solely on the source IP address of a packet.

Question:

1. With Cookie presistence, if I set the LTM2 with will the cookie presistance will the cookie come from the source client machine or from the LTM1?

2. With Source address affinity presistence, if I set the LTM2 with will the Source addr presistance come from the source client machine or from the LTM1 snat IP?

3. With eaither of these profiles, will I need to have presistance set on both LTM1 and LTM2 for it to work properly?

Thanks in advance!

-Greg Wilson