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?