Folks, there is new code maintenance release posted to CCO that has bug fixes. Since the problems are hard to pin down you may want consider upgrading to this code to see if it makes a difference.
The release to consider is 7.0.98.218. Cheers On 4/15/11 10:17 PM, "Watters, John" <john.watt...@ua.edu> wrote: > I have the exact same issue in several locations on campus -- a couple in > dorms, and a couple in academic buildings. I have not actually been able to > see the problem (you were lucky there), but the description (from numerous > sources) is identical. And, not just MACs, but many/most devices including PCs > (Win 7 & XP) and various phones. No help from Cisco so far. But, since I don't > have a machine that always fails (it seems that you might have access to at > least one of these), nor can I recreate the problem, I can understand why > Cisco is not doing very much to help me. I have certified all my WiSM & AP > configs with the Cisco WLC Config Analyzer tool. Made a couple of minor > adjustments that didn't seem to make any difference with this problem (or any > that I am seeing). Turned off all b access too (I had previously limited it to > 11 Mbps only). No clues at all. But, the reports still stream in at a rate of > 3-4/week with none of them resolved. Started having the problem with the > 6.0.199.4 code and it persists with the 7.0.98.0 code that I am now running > (at Cisco's request; it has been rock solid as far as I can tell). > > I thought I had it narrowed down a while back, but maybe not. We have seen > times when a machines fails to get an ARP entry even after getting a good DHCP > address. Obviously, no traffic ever went to or from the device with this entry > missing. It was easy to duplicate too. When a machine got into this state, it > would stay in it as long as it was associated with an AP on one controller. > When it went to another controller (not via a roam, but with a new > association) it would be fine. When it came back under the control of the > original controller, it would have the problem again, even several days later. > It could only be cured by rebooting the WiSM controller. This seems to have > gone away with the 7.0.98.0 code though. > > I think my current problem, and yours is not related to the missing ARP > problem. > > Please let me know if you get even a clue as to what is happening. I will do > the same. I am under a lot of pressure to solve this. > > -jcw > > ======================================= > John Watters > Network Engineer > The University of Alabama > Office of Information Technology > 205-348-3992 > > > > ________________________________ > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lay, Daniel > [dl...@samford.edu] > Sent: Friday, April 15, 2011 5:20 PM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: [WIRELESS-LAN] Strange Cisco AP problem > > I have run into a very odd issue. We have received complaints from students > that they are having wireless issues in specific dorm areas. After receiving > such a report I went to investigate, I walked the entire dorm connecting to > each AP with several devices(an iphone, an Ipad, a XOOM tablet, and a laptop) > and everything worked exactly as it was supposed to. The next morning as I was > sharing my findings with the helpdesk guys 2 students walked in, and as luck > would have it they were from the same dorm that I had just verified the > evening before. So we went back to the dorm to look at it from their device > So now we are back at the dorm looking at a student¹s Mac Book > Pro. When the student is anywhere else on campus it works just fine on > wireless with any SSID. In his room however we cannot Tx/Rx to the network or > to internet. One strange thing to note here is that while his machine could > not Transmit or receive data it did get an IP address from DHCP. I was also > able to connect to the same AP with my IPAD and XOOM and then open Wireless > Control System and look back at the students machine. I wiped his connection > and started from the beginning only to arrive at the same result. I then moved > his system to another location and reset his connections. I moved back to his > room and it still would not function. I reset the AP and then it started > working. I would say well it comes down to a simple reset but having several > connections that are working fine and several connections that are not working > all on the same AP is concerning. I have about 3 locations on campus that are > experiencing this same behavior. I have rebooted them but it still seems to be > having the same problem. > > We are using Cisco 1130 AP¹s with both A and B/G radios on > They are connected to 4404¹s that are running 6.0.199.4 code > All are connected to a WCS running on a virtual machine with software version > 7.0.164.3 > ********** 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/.
