Did you check your radius ports and radius key ?, this should match your IC configuration. If you dont get response from the first configured server, then will try second one. But i you get a refuse response, then will not try more radius servers. Since you have to radius with the same ip, but different ports and key, have to check if you are getting any response from your ic server, if for the first ports/key line you get a refuse, will not try the second configured line. Try to do a debug radius authentication, debug radius verbose, debug dot1x errors, debug dot1x events, show dot1x interface detail. First you have to be sure the switch is sending the auth request to your ic server.
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