This command is used to specify the IP address of an interface as the source address for global
Telnet connetction. When using the telnet command to log in a Telnet server, apply the global setting
if no source interface or source address is specified. Use the no ip telnet source-interface
command to restore it to the default setting.
The following example configures the IP address of the Loopback1 interface as the source address
for global Telnet connection.
Ruijie(Config)# ip telnet source-interface Loopback 1
You can lock the terminal interface and maintain the session continuity to prevent access to the
interface by setting a temporary password. Take the following steps to lock the terminal interface:
 Enter the lock command, and the system will prompt you for a password:
 Enter the password, which can be any character string. The system will prompt you to confirm
the password, clear the screen, and display the "Locked" information.
 To access the terminal, enter the preset temporary password.
 To lock the terminal, run the lockable command in line configuration mode and enable terminal
locking in the corresponding line.
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