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Hello; I was trying to lock the radio frequency on IR809 and IR829 Routers following the instructions given under Section "Radio Frequency Band Select " in following link : https://www.cisco.com/c/en/us/td/docs/routers/access/800/829/software/configu...
yeah it's obviously a problem with tacacs/radius authentication, I used to face same problem when i change the router name and forget to regenerate the crypto key. example ; crypto key generate rsa modulus 2048