login — line
login [local | tacacs] no login [login | tacacs]
The login authentication method for connections
This command tells the line to authenticate the user before allowing access. If you give this command without any arguments, you must use the
password command to specify a password for this line. The
local keyword tells the router to maintain its own database of users, created using the
username command. The
tacacs keyword tells the router to authenticate users by contacting a TACACS server.
login local, make sure you have at least one username configured before you log out. Otherwise, you will be locked out of the specified lines.
To enable simple authentication using a single password for all access through this line:
line vty 0 4 login password letmein
These commands enable authentication using a local database of usernames and user-specific passwords; users Bob, Ann, and John are the only ones able to log into this line.
username bob password letmein username ann password letmein2 username john password letmein3 line vty 0 4 login local