When AAA authentication through TACACS+ is enabled upon the remote access to the Nexus 7000 Control Processor (CP), login to the CMP (Connectivity Management Processor) via Telnet using a valid TACACS+ username and password failed with the error message "User not known to the underlying authentication module".
Cisco Bug ID: CSCte25626
C:\>telnet 192.168.1.1 Linux 2.6.10_mvl401-pc_targetpspos (n7k-core-sw01-cmp6) (0) n7k-core-sw01-cmp6 login: user1 Password: User not known to the underlying authentication module Connection to host lost. C:\>
Reboot the CMPs using the reload cmp module slot privileged command on the CP.
Continuous ping to the management IP addresses of the CMPs will timeout for a short period. After the management IP addresses start replying to ICMP Echo Requests, login to the CMP using a valid TACACS+ account is then successful.
Linux 2.6.10_mvl401-pc_targetpspos (n7k-core-sw01-cmp6) (0) n7k-core-sw01-cmp6 login: user1 Password: n7k-core-sw01-cmp6# n7k-core-sw01-cmp6# sh version CMP Software: CMP BIOS version: 02.01.05 CMP Image version: 4.2(1) [build 4.2(1)] CMP BIOS compile time: 7/13/2008 19:44:27 CMP Image compile time: 1/5/2010 1:00:00 n7k-core-sw01-cmp6#