Two cisco 1131AG at the same time crash the wlan network!

Question

Hi to all
I have a strange problem and need help.
Setup (constellation):
2 Cisco Aironet 1131AG connected to a Zyxel DSL Router with integrated 4 Port Switch, both AP's have the same configuration (with exception IP Adress).
If i patch only one AP it works fine, i see the SSID and i can connect, AP01 or AP02 does not matter, but if i connect/patch both AP's on the Zyxel DSL Router the Port from the AP02 goes down (no flashing) and the Port from AP01 flashing funny (flapp).
No connection to the WebGui is possible and the WLAN SSID can not be found.
Whats that for a strange Problem?!
Thank you in advance for the help
regards,
Beat
Attached the configuration files from AP01 and AP02.

Answer 1

Assume that the AP is still power up. From my experience, there are two reason why you cannot access the console: low process memory or high CPU. If there is not enough process memory, you should get a message complaining low memory on the console.
From the problem description, it sounds like that the APs are running at high CPU. Some packets are looped between the AP, IOS is designed to pump up the job priority for console once in a while; so that the console will be responsive once in a while; even though the AP is running at high CPU. I assume that the Zyxel does not have port mirroring/monitor session.
I wonder if you can do the followings:
1. console attach to the AP
2. make sure terminal monitor or logging console is enable
3. run debug fastethernet packet xmt or debug fastethernet packet re just before the second AP is powered up
The AP should display the packets looped around. If you can collect the output of show process cpu | exclude 0.00, it will be even better.