Holy Cow, 25,000 concurrent users ? I'm curious how much bandwidth that would take up. Also, I know the 6500 says it can handle 25k but has anyone stress tested it ? Anyway, I think you need to buy and install the Clustering license " Allow 25k additional users to be shared from another 6500 ", on 2 of the 3 boxes. One will be the primary with the all the simultaneous user licenses. Also, With that many users, I'd think you'd want to spread out the load on these boxes. I guess you're running Active/Active/Active or do you have some kind of load balancer in front ? On a side note, on a purchase of that size, I'd think you'd have a team of sales reps to help you out. Good Luck, I'd love to hear how it goes. Justin
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