Cisco WS-C2980G-A Software Guide - Page 458
Disabling Local Authentication, Recovering a Lost Password, Caution, Step 1 - password recovery
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Configuring Authentication Chapter 30 Configuring Switch Access Using AAA Disabling Local Authentication Caution Make sure that RADIUS or TACACS+ authentication is configured and operating correctly before disabling local login or enabling authentication. If you disable local authentication when RADIUS or TACACS+ is not correctly configured, or if the RADIUS or TACACS+ server is not online, you may be unable to log in to the switch. To disable local authentication on the switch, perform this task in privileged mode: Step 1 Step 2 Step 3 Task Command Disable local login authentication on the switch. Enter the console or telnet keywords to disable local authentication only for console or Telnet connection attempts. set authentication login local disable [all | console | http | telnet] Disable local enable authentication on the switch. Enter the console or telnet keywords to disable local authentication only for console or Telnet connection attempts. set authentication enable local disable [all | console | http | telnet] Verify the local authentication configuration. show authentication This example shows how to disable local login and enable authentication for both console and Telnet connections, and how to verify the configuration (you must have RADIUS or TACACS+ authentication enabled before you disable local authentication): Console> (enable) set authentication login local disable local login authentication set to disable for console and telnet session. Console> (enable) set authentication enable local disable local enable authentication set to disable for console and telnet session. Console> (enable) show authentication Login Authentication tacacs radius kerberos local Console Session disabled enabled(primary) disabled disabled Telnet Session disabled enabled(primary) disabled disabled Enable Authentication: Console Session Telnet Session tacacs disabled disabled radius enabled(primary) enabled(primary) kerberos disabled disabled local disabled disabled Console> (enable) Recovering a Lost Password To recover a lost local authentication password, follow these steps. You must complete Steps 3 through Step 7 within 30 seconds of a power cycle or the recovery will fail. If you have lost both the login and enable passwords, repeat the process for each password. 30-14 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
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