Interesting that I see the same behavior with Aruba hardware. Had several cases open over the last year, and every time seemed to be a bug triggered by certain traffic that would caused a memory leak or a kernel crash in the APs. It stops during the summer months when most students are gone. During the school year is completely random, however, it does seem to happened more often to APs in residence halls and apartment buildings. My monitoring server has a pretty low down threshold, that is why I see this happening, otherwise it would go unnoticed since we have overlapping coverage in most areas. Like Dan said, there are probably some users that experience a brief delay in service when the AP suddenly reboots. I don't mean to steal the thread, but anyone with Aruba AP-125s experiencing this issue? I have seen it with Aruba OS 5.0+, and now with 6.1.
Marcelo Lew Wireless Enterprise Administrator University Technology Services University of Denver Desk: (303) 871-6523 Cell: (303) 669-4217 Fax: (303) 871-5900 Email: [email protected] -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Dan Brisson Sent: Tuesday, January 31, 2012 7:55 AM To: [email protected] Subject: Re: [WIRELESS-LAN] Cisco APs losing CAPWAP session Our AP subnets are /24s and latency appears to be under <1ms, which is what I would expect as everything is fiber connected. Thanks! -dan Dan Brisson Network Engineer University of Vermont (Ph) 802.656.8111 [email protected] On 1/31/12 8:46 AM, Mike Goebel wrote: > How big are your subnets the APs reside on, and how is your latency > from the controllers to the APs? I know the APs are latency sensitive. > > Mike > > On 1/31/2012 8:44 AM, Scott Smith wrote: >> We installed around 700 over the summer in our residence halls as well. >> >> I've seen the same issue. However we've never had WCS until the same >> project. I'm starting to wonder as well. >> >> Yup....it's a Droid !!! >> >> On Jan 31, 2012 7:39 AM, "Dan Brisson" <[email protected] >> <mailto:[email protected]>> wrote: >> >> I'm curious if any Cisco users out there are experiencing or have >> experienced what we're seeing on our campus. This past summer we >> installed 3502i's in all of our residence halls - approximately 500 >> total. Ever since the students have moved in, we will get messages >> from WCS stating that "AP XYZ" is down and disassociated from the >> controller. When I check out the AP, the uptime is fine, but the >> "CAPWAP join time" is for like 30 seconds, or however long it took >> me to check. >> >> We've tracked this and it is totally random as to what AP will drop, >> which makes troubleshooting this very tough. The log on the AP >> isn't helpful. I'm working with TAC who suggests that keepalives >> are getting missed. I'm not sure why that would be the case since >> we have another 500 or so APs on the admin side that very rarely >> drop. Adding to that, when the students left for break, the AP >> drops stopped. They came back, and sure enough, the drops start up >> again. >> >> I will say that the AP always joins back immediately, but for the >> time that it does drop A) I'm sure connectivity is affected in that >> area and B) we get an email. >> >> Anyone experiencing this? >> >> Thanks, >> -dan >> >> >> -- >> Dan Brisson >> Network Engineer >> University of Vermont >> (Ph) 802.656.8111 <tel:802.656.8111> >> [email protected] <mailto:[email protected]> >> >> ********** >> Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at >> http://www.educause.edu/__groups/ <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/. >> > ********** 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/.
