Forum Discussion
Michael_Whidden
Nimbostratus
NimbostratusF5 GTM Persistence TTL - Is it an Idle Timeout?
When a persistence TTL is configured for GTM, is the TTL computed from the first time a customer visits, or is it computed from the most recent time the customer has visited? I'm concerned about a 36...
The expires time on the persistence record does not appear to increment with subsequent DNS requests, so I would say it is computed from the first time, not the most recent time.
Generally the larger problem than this is what happens when the client's LDNS changes in the middle of their session? Using Topology or Geo rules would seem a safer method to try and make sure they stay on the same LTM.
mimlo_61970
Cumulonimbus
CumulonimbusThe expires time on the persistence record does not appear to increment with subsequent DNS requests, so I would say it is computed from the first time, not the most recent time.
Generally the larger problem than this is what happens when the client's LDNS changes in the middle of their session? Using Topology or Geo rules would seem a safer method to try and make sure they stay on the same LTM.
Michael_WhiddenThank you for your answer, but it seems to be exactly the opposite of the answer posted by user 'raj' a little after you. Can you clarify?- mimlo_61970My answer is based on observation on my GTM running 11.2.1 I created a WideIP and querried it. I then checked the persistence record on the GTM and noted its experation, which was 1 hour in the future. I made additional queries to the GTM and the experation did NOT increment. I did this for 10-15 minutes and the persistence experation never changed. I may very well be wrong, but based on observation I do not see the persistence record getting extended out with each subsequent dns query.
- Michael_WhiddenHard to argue with that!
Dan_PachecoCirrus
I just ran the same test on v12.1.1 and I get a different restul. The expiry time updates with each subsequent DNS request. Therefore it is an idle timeout.