Is the Static Persist mode used with what kind of case on the GTM?

Taro,

 

 

Static persist is the only persistence I use on the GTM. Wide IP persistence doesn't have a "Static Persist CIDR" setting that Static Persist uses to fix ISP's using some form of load balanced DNS. So Wide IP persistence doesn't provide persistence for users that have load balanced DNS.

 

 

There seems to be limited documentation on how static persist work. The answer to your question is that static persist uses an algorithm.

 

 

What I know is that the static persist load-balancing mode uses the persist mask with the LDNS address in a deterministic algorithm to map to a specific pool member in a pool. Given the order or number of the pool members is not changed, the LDNS address will always be mapped to the same pool member.

 

 

The algorithm is deterministic and it will result in the same pool member being picked for the same LDNS no matter which gtmd is running the algorithm.