Mirroring session table

Glad you found this out, this is exactly what I was saying in my earlier post. You need to use session mirroring on the VIP which will replicate all session information to the standby unit, we do this for select projects where required. I have seen data entered from the primary replicated to the standby, simply did a tcpdump on the standby.

 

 

One thing I would highly caution everyone on is, make sure you setup a secondary administrative VLAN and assign your failover IP's to it, which will force session mirroring over that select VLAN. I found this out the hardway when we had a particular application receiving dual database posts with session mirroring enabled, we had to force everything through an out-of-band VLAN (essentially setup a crossover cable between the active and standby, setup a VLAN and assigned IP's, then forced all synchronization and failover traffic to it) solved everything, and works great.

 

 

Course it's not 100%, nothing is, if the data from a client isn't replicated in time when the primary goes down, there is a potential for loss of data, but the risk is small.