Michael,
Thanks for the reply and the info. I think I understand what you're saying about the OneConnect, but I'm not sure that's my problem. I can see what look like exisitng sessions (unique IP/port ) sending persistence cookies, then for a few seconds stop sending persistence cookies, and then start again. As near as I can tell, these times when they fail to send their persistence cookie is when they have problems if they have problems, as they should if they get sent to another server. Do you have any idea what could be causing that and will the OneConnect maintain persistence whether or not they send the persistence cookie? I'm OK with everyone from that NAted IP going to the same physical server, as long as they can fail over to another if needed, so I'm trying not to staically set what server they hit.
Dave