Lee, We're going through this as we speak. We've seen some issues with the controllers physically bowing. We've also had issues with running HA via Layer-2 when upstream routing engines/supervisor cards fail. Part of the issue is that there is very limited keep alive timer control in our version of code and the thresholds aren't high enough to mitigate the route engines switching over. Cisco recommends direct connecting them, so we've resorted to using switches as media converters for the direct connection.
The good news is that 8.0.100 reintroduced timer controls that did mitigate the failures when using Layer2 for the HA. The bad news is that 8.0.100 caused watchdog failures in the 8510s. Respectfully, Matthew Williams IT Manager, Wireless Kent State University Office: (330) 672-7246 Mobile: (330) 469-0445 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: Thursday, February 19, 2015 2:35 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Looking for testimonials- 8510 vs 5508 WLC reliability One more for the group: Having a large number of 5508s, I have an interest in greatly simplifying the environment by moving to higher capacity 8510s (zero interest in 5760s). I'm hoping to hear from those that have taken the 8510 plunge. For us, outside of code issues, the 5508s have been solid hardware for us. Would like to know whether current 8510 users find them to be reliable as hardware, and whether the HA promises live up to the glossy. Thanks- Lee B. Lee Badman Wireless/Network Architect ITS, Syracuse University 315.443.3003 (Blog: http://wirednot.wordpress.com) ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
