So I still have no solution to this. Not sure I'm explaining it correctly.
We have 2 7030 controllers, approximately 25 IAP215 total over the 9 clusters, CPPM, Airwave (GUI configuration, but based on a master template), approximately 25 AP225 (over 2 sites), we use certificate/user authentication and VIA vpn too.
I have 9 IAP sites (the clusters at each site vary from 1 iap to 8 iaps), each site is allocated an dhcp address range with in a /21 - but the scope on each cluster is set for /24 (to give us expansion room if the sites grow larger)
We have a bit of an issue when we put all 9 sites into one group - one of the sites will no longer work - won't hand out dhcp, pass traffic properly etc - makes the site completely unusable until the VC is rebooted, at which point it kicks one of the other sites off the network. Our work around is to only have 8 sites in one group. We came to this solution when TAC said it was a dhcp issue - but I can't find any information on what that issue is. Not sure if anybody has any other thoughts - I seem to have stumped TAC and their solution is to make it happen so we can test on a live production system and have your users be unable to work - not a solution we can live with right now (I've been battling this issue for 11 months - needless to say extended wireless downtime is not good).
Any thoughts or advice would be greatly appreciated.
Lirra