Nimbostratus
Can anyone please let me know when does the fallback persistence come into picture? and on what scenarios will the persistence configured be not used to check the fallback persistence?
kiran
Employee
Fallback persistence only comes into play when the primary persistence mode fails for some reason (ie, client doesn't accept cookies or some similar situation). The only valid fallback mode is source IP persistence. So if fallback persistence is enabled, the LTM will keep a table of source IP persistence records that it can use in the case of the primary method failing.
Denny
AltostratusThere doesn't seem to be a whole lot of difference between cookie and source IP persistence. If cookie-persistence is the primary and source-IP the fallback profile, most clients won't have the cookie yet when they first connect so the fallback profile will be used.
The cookie seems to be limited to the session anyway, so functionally there doesn't seem to be a big difference between the two options. I'm not sure if the cookie persistence would last longer than the IP-persistence, although it would be doubtful that the server/node would keep session information longer than the IP-persistence tables are retained.