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I am using AP 1131, it working [ I am able to associate with laptop ], but in 7921 it show "connection failure error", any suggestion to troubleshoot this problem
If the laptop works, then could be a config issue on the 7921 or the AP country code is not supported.
What 7921 model do you have?
What authentication/encryption are you using?
What country code is being sent by the AP?
Refer to the 7921G Deployment Guide for the supported country codes.