Re: Association table overflow

Rodney-roberts · ‎12-16-2004

Has anyone seen this before. every once and a while i get calls from my users saing that no one can get on the wireless hotspot. after doing some troubleshooting i find out that only one person can get on at a time. this happen at difftent hotspots with diffrent users. i use airmagnet to catch some info while its happing and when every someone tries to access the AP. i get a message saing DoS Association table overflow. now there arent ane rouge Aps or war drivers around at the time. so i dont think its a DoS. and once i reboot the AP every thing is back up and running fine. by the way im using 1200s B raidos 12 dbi omni anttenas runnign IOS Version 12.2(11)JA1, i have just upgraded to Version 12.3(2)JA to see if that helps. i just wanted to check here before i open up a TAC case

dfrance · ‎12-22-2004

We are located where there are lots of APs, ours and others. In the last week I have had complaints of unability to logon (802.1x TTLS, PAP; WPA w/RADIUS) with several 1200s fw12.2.13. Airmagnet has seen Association table overflow on 1 AP in the affected area. Looks as if multiple clients are logged in passing traffic while some clients are unable to log in.

Holdoff is not set on these APs and there are multiple unsuccessful logins in the logs. I have configured holdoffs on some as a test.

I'd be interested what TAC has to say.

Rodney-roberts · ‎12-23-2004

That soulds exactly like my problem. keep me posted on how you TAc case goes.. also does your problem fix itself after a reboot of the AP, like mine does?

dfrance · ‎12-23-2004

I haven't contacted TAC yet since I can't translate Airmagnet's Association table overload into Cisco speak. Right now all I could do is send Cisco an Airmagnet packet file.

I didn't reboot when the problem occurred because I had mulitiple client using the APs at the time. I did reboot later but the problem also came back later. The problem just started happening and then usage went away because the users went away.

Have you seen lots of failed logins, or any TKP Replays in your logs?

Rodney-roberts · ‎12-23-2004

i do have failed logins. but when it happens to me . only one user can log on and the others arent allowed in. now that you mention it i only see the problems in area where there are more APs than just mine. ie. the dlinks, and such.