How to Block LAP1242 AG connect WLC

Hi Friends,
Did you meet this issues that the remote site (US) AP 1242 always connect to our site(ASIA) WLC 5508 (maybe some DHCP configure caused when troubleshooting, right nowDHCP back to normal. only enable vendor and option 43 for 1262 and 3602, no option 43 for 1242), but now we cannot block these AP1242 to join our site 5508 WLC. even I reset the 1242 AP to default configure from WLC GUI and CLI , but it's still there in a mins.
Since in our site Core SW, Router cannot find these AP mac address, and also those AP not the IP address in the WLC GUI and CLI . SO we don't know where it is? can you pls help?

Well that is how to block APs from joining:). If you know these APs have to join a specific WLC, then create a dhcp option 43 for these APs or temporarily create a DNS entry for these APs to join the WLC it is suppose to. You can't just block these APs from joining if you have mo ility between the WLCs and or if your using option 43 and or DNS that helps these APs join the WLC. So now what your stuck with is making these join the right WLC. When you do that, then remove all your option 43 from dhcp and disable the DNS so none of the APs will be able to join the wrong WLC.
Sent from Cisco Technical Support iPhone App

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