CF 7 Cookie Issue

[aqlong]

background:
- 2 prod servers one is running CF 6 the other CF 7 (the reason is to ensure cf 7 functions correctly w/half of our traffic for a few weeks)
- both have own external IP and users are routed via round robin DNS

issue:
- someone logs into our SSL area successfully but when they click a link to run a report etc, they are kicked back out to login screen as if they never logged in
- this is not happening for every user, just a few
- suspect it's a cookies issue because if we route them to a specific server (e.g. www1 or www2) then they can "stick"; without that they don't

question:
- could this be the purge interval setting in CF 7 that isn't part of CF 6? or is it because we're running two versions of CF server

any help is appreciated.

[CutterBl]

I think your sticky sessions are hosed. What's handling your round robin DNS? We recently went from an older model load balancer to a brand new IP5, and immediately noticed that our sticky sessions were actually beginning to stick. It wasn't that the older model didn't do sticky sessions, it just wasn't terribly effective at it.

[Willow315]

Am about to impliment a second server. We're hopefully going to be running CF 8, but if not yet, I think I should run CF MX7 on both. What do you recomment as the best load balancer, IP5? elaborate for this newbie to multiple servers? Thanks, WCW