Wondering if anyone in the group cares to hazard a theory. Our Cisco WLAN has been quite stable for better than three years. Currently running *180* 1130s, *120* 1200s, and a couple dozen 350s- mostly IOS but a couple of legacy VxWorks that are hard to get to to convert. We have the clasic "DMZ/Captive portal" thing going on, where a home-built gateway head-ends each of our two major wireless spaces, with an optional VPN box for each space. We do trunk specific VLANs around for each space. WLSE manages it all, no WLSM, no forced client encryption (other than voluntary VPN). IOS APs are current and all within 2 minor revisions of each other, and have been cruising along nicely for quite a while.
This past Saturday, very early in the morning, one of our wireless spaces was creamed by some sort of broad-ranging, severe multicast flood. Long story short- it seemed like the APs were chattering back and forth to each other with huge, continuous, multicast streams that overwhelmed many of the switches carrying the traffic. Once it started, it seemed to be self-propogating. We had to put in some ACLs to break things up, and in some cases reboot the switches. Cat 3500s seem to take the worst of it, and a couple got corrupted to the point of becoming doorstops. Knowing that it's hard to see the whole picture from afar, wondering if anyone has ever experienced anything like this? Thanks for playing the game. Lee Lee Badman Network Engineer CWNA, CWSP Information Technology and Services (Formerly Computing and Media Services) Syracuse University (315) 443-3003 [EMAIL PROTECTED] ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
