Running 4.2.176, but have seen this going back to 3.2. Is an occasional occurrence, rarely the same AP twice, and usually somewhat out of the blue.
For us, cabling can be ruled out (for the most part). I know Bruce suggested disabling CDP on AP ports, but that's really not an option as we rely on that information- need all the help we can get keeping track of 2,000+ APs. When one loses its controller association but still has IP address, CDP can be used to find it to kill/restore power for remote reboot- needed on occasion. I'm getting the sense that we are not alone in these power issues... Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Hector J Rios Sent: Thursday, March 19, 2009 10:35 AM To: [email protected] Subject: Re: [WIRELESS-LAN] Have to lie to LWAPP APs about power injectors? Lee, What version of controller code are you running? I'm sure you know this but just make sure the Cisco PoE is providing standard 802.3af, otherwise you have to check the "PreStandard" box. It's interesting because we had a similar issues a while ago, but with injectors, as opposed to the switches. Usually unchecking all the options for the AP under "PoE ethernet settings" and restarting the AP would do the trick. Finally, check your cables and make sure there are no attenuation issues or a cut somewhere along the line. Thanks Hector Rios Louisiana State University From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Lee H Badman Sent: Thursday, March 19, 2009 9:00 AM To: [email protected] Subject: [WIRELESS-LAN] Have to lie to LWAPP APs about power injectors? Wondering if anyone else experiences this. I'm working now to see if it is isolated to a single Catalyst switch or if it is more widespread. Frequently, we will get a report that a radio on an LWAPP AP is down. Sometimes the alarm is for insufficient drawn power, sometimes not- just radio down. Better than 90% of the time, a simple AP reboot will not do any good- we have to lie to the controller that the AP has a PoE injector installed, even though the AP is on a switch. Usually the condition is onesy-twoesy- not every AP on a given switch (although this morning we saw that) and often happens on APs that are obviously not taxing a given switch's available PoE output. I am opening a case as we see this enough to be of concern, but also am wondering if anyone else has experienced this in a given environment where LWAPP APs are powered by Cisco PoE switches? Thanks- Lee Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ********** 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/.
