Using Encrypted persistence cookies with multiple LTMS
I have a dual datacenter architecture, using GTMs to load balance between datacenters, and in each datacenter I have a pair of LTMs that use cookie based persistence, so that if DNS persistence fails, the LTM in the opposite datacenter can still send the traffic back to the original webserver via an internal backhaul circuit. I use the same pool names so the persistence cookie will work in either datacenter. My question is if an LTM in one datacenter encrypts the persistence cookie, would the LTM in the other datacenter still be able to use it? I haven't been able to find much documentation on how the cookies are encrypted. My guess is that the LTM that encrypts it has a private key to unencrypt it, and that key probably wouldn't be available to the other pair of LTMs. Anyone have experience with this?