3750G WLC not working after enabling IP routing

Jonathan Hall · ‎06-15-2009

We've got a WS-C3750G-24WS-S50 that has been happily running in switch mode for some time. We now need to use it for IP routing as well. However as soon as I add "ip routing" to the config the WLC and the switch start missing keep alives. "sh platform wireless-controller" shows the controller status as wait_for_keepalive and the WLC reboots every few minutes.

Has anyone seen this before? Any suggestions as to what the problem might be?

Leo Laohoo · ‎06-15-2009

If the switch regularly reboots, do you see a crashinfo file? If so, can you post it?

Jonathan Hall · ‎06-16-2009

It's not the switch that's rebooting, rather the wireless lan controller inside the switch. I think because the switch is not seeing the keep alives from the WLC it reboots it.

Anyway I've found the fault turns out to be bug ID CSCsu02630. Which effects only two versions of IOS, one of which we where running. Upgrading to the latest IOS has fixed the problem.