I have a WLC (4402) running version 220.127.116.11. The WLC used to have both interfaces connected to a single switch (LAG was enabled) with etherchannel on the switch end. It was changed such that each port on the WLC is connected to a different switch (for protection against switch failure). After I made the configuration changes, I tested by disconnecting port 1 of the WLC from the network. I had a wireless client performing a continuous ping on the network. When I disconnected the cable from port 1, the ping continued uninterrupted (which is what I expected). When I looked at the WLC, the APs had switched over to port 2. However, when I plugged the cable back into port 1, the wireless client could no longer access the network and was unable to access the network again until after I did a manual repair on the wireless adapter. I did not expect that. Any thoughts on why this happened?
For reference, I've attached a partial config output from the WLC (with any identifying info stripped out).