Thank you for your answer.
I have analyse a lot of things..
I have captured traffic on the 2 port interconnected whith SMLT
During the problem ( when CP-Limit shutdown ports) i can see a lot of packet broadcast ant multicast from hosts...
The packets rate from this hosts explain the shutdown by CP-LIMIT
On core 8600 logs are :
2014-02-06T15:06:28.610524+01:00 CPU5 [2014-02-06 15:22:01] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 0, broadcast 19010 packet per second
2014-02-06T16:19:02.775216+01:00 CPU5 [2014-02-06 16:34:37] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 0, broadcast 20348 packet per second
2014-02-06T16:35:34.479815+01:00 CPU5 [2014-02-06 16:51:08] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 3385, broadcast 6228 packet per second
2014-02-06T16:35:41.162774+01:00 CPU5 [2014-02-06 16:51:14] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 8322, broadcast 3878 packet per second
2014-02-06T16:50:03.269101+01:00 CPU5 [2014-02-06 17:05:37] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 0, broadcast 9225 packet per second
2014-02-06T16:50:04.246056+01:00 CPU5 [2014-02-06 16:50:28] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 7089, broadcast 1192 packet per second
2014-02-06T18:31:32.311575+01:00 CPU5 [2014-02-06 18:47:06] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 0, broadcast 16031 packet per second
2014-02-06T18:48:07.895803+01:00 CPU5 [2014-02-06 19:03:42] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 0, broadcast 7470 packet per second
2014-02-06T19:19:13.388023+01:00 CPU5 [2014-02-06 19:34:47] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 3181, broadcast 12872 packet per second
2014-02-06T19:19:14.561270+01:00 CPU5 [2014-02-06 19:19:39] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 11120, broadcast 287 packet per second
2014-02-06T20:41:58.053996+01:00 CPU5 [2014-02-06 20:57:31] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 3172, broadcast 8035 packet per second
2014-02-06T21:31:34.728844+01:00 CPU5 [2014-02-06 21:47:08] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 0, broadcast 14406 packet per second
2014-02-06T21:31:38.252815+01:00 CPU5 [2014-02-06 21:32:02] CPU WARNING Shutdown port 4/5 due to excessive control frames multicast 17536, broadcast 0 packet per second
this packets become from a stack after distribution stack.
But i have problem to understand if this massiv storm packets are due to problem on hosts or a network loop which duplicates packets about these hosts....
Can you help me for ths analyse

If it is a loop.. why it does not stop by bpdu filtering, or rstp... and how discover where it is
this packets storm show a massive flow of packet from Ghost Client... which is try to discover server...
Network loop or bad hosts ....