Forum Discussion
NimbostratusSEG servers not balancing correctly
We are load balancing from 2 SEG servers to a Virtual server and then have 6 mail gateways in the pool with cookie persistence set. 95% of the connections go to 1 member in the pool. When I look at the persistence records I see about 10 with source address affinity. What I don't understand is if the server has been passed a cookie why I'm seeing these persistence records. I would like understand this first before moving on to correcting the balancing issue.
youssef1Cumulonimbus
Hello Andrew,
First of you have to understand the difference between IP address persistence and Cookie persistence.
IP address persistence need a correspondence table (persistence records in F5), because no information is stored on the client side that allow F5 to LB you on the right backend. This kind of peristence has these limits because after a certain number of records you reach the maximum limit and you can have resets...
Cookie persistence means that all information regarding LB are stored in client side in a cookie. That's mean that F5 don't need to store this information in F5 (persistence records).
to conclude, source address persistence information are stored in F5 and persistence cookie information are store in the cookie that host in client browser (so not in F5) that's the reason why, you will not see this information in F5...
If you see Source address peristence records while you replaced it with cookie persistence. it may be because you set source address peristence as fallback persistence or that there are still active sessions that used this persistence...
Hope it help your.
Regards,