APs showing down on controller, but they are up and pinging

[salvi]

I noticed today that one of our 3400 master controller is showing alot of APs as being down.  I checked Airwave and it shows them as up.  I am able to ping the APs even from the controller.

Why is the controller showing them as being down?

[cjoseph]

-What version of code is this?

- Is that controller a master or a local controller?

- Do you see the APs as down on the commandline, GUI or both?

- type "show ap bss-table" to see if those access points are even broadcasting.

[scottdoorey]

i've seen similar behaviour on a 3200 running 6.1.2.3 and it turned out that the DHCP server had exhausted the scope and the AP's were dropping off the controller and rebooting.

I think there was some double allocation going on that was causing the erratic behaviour.

[salvi]

*Version is 3.4.1.0

*It's a Master

*See them down on the CLI and GUI

*APs that are down are not broadcasting, ones that are up are.