We have performed exhaustive troubleshooting with this particular issue. We tested several switches and found the problem to be the AP. We have been working with Aruba over the past several weeks (months) and they have determined that the 5Ghz radio profile with the scanning option enabled, causes this phenomena. When the radio comes off scanning, it sends a single broadcast packet that pushes the power on the 5Ghz PA over the AF limits. Aruba has provided a custom build which we are going to test and implement tomorrow. Aruba feels confident that the software change will solve the issue. They have performed an exhaustive engineering review of the components and determined it to be software based.
I will post results of our upgrade in the next couple of days. Michael Hulko On 2012-11-07, at 3:05 PM, Jason S. Cash wrote: > On Wed, 7 Nov 2012, Chuck Enfield wrote: > >> Hi Folks, >> We’re experiencing a significant number of problems where our PoE switches >> report that Aruba AP-105s are drawing more than 15.4W. When this happens >> our switches shut off the power to the offending AP. The problem is >> intermittent, but seems to occur repeatedly on the same APs, while never >> occurring on other APs. Our diagnostics have eliminated excessive loss in >> the cabling as the culprit, which seems to leave two possibilities. Either >> there are some Aruba AP-105s which are using more power than they are >> supposed to, or our switches are incorrectly measuring the power consumption >> of the APs. If the APs are at fault, it’s unlikely that we would be the >> only ones with this problem. Is anybody else having any issues with Aruba >> AP-105s drawing more than 15.4W? > > Yes, We have a few ap105s sitting in a box with this exact issue. It doesn't > appear the be the switch in that we have seen it occur on both cisco 3560-X > and juniper ex3300 switches. > > > Jason > > >> >> Thanks, >> >> Chuck Enfield >> Sr. Communications Engineer >> Telecommunications & Networking Services >> The Pennsylvania State University >> 110H, USB2, UP, PA 16802 >> ph: 814.863.8715 >> fx: 814.865-3988 >> >> >> ********** Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at >> http://www.educause.edu/groups/. >> > > /* Jason Cash IT/Network and Systems Services > University of Delaware, Newark Delaware > e:c...@udel.edu v: 302-831-0461 */ > > ********** > Participation and subscription information for this EDUCAUSE Constituent > Group discussion list can be found at http://www.educause.edu/groups/. Michael Hulko Network Analyst Western University Canada Network Operations Centre Information Technology Services 1393 Western Road, SSB 3300CC London, Ontario N6G 1G9 tel: 519-661-2111 x81390 e-mail: mihu...@uwo.ca <mailto:mihu...@uwo.ca> ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
