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This is how to use telnet connection from Cisco router.
Router# telnet IP-address or host-name
When disconnet it,
Router# exit or logout
Show console message on telnet connection
When you login to the router from telnet, console message does not appear while it always appears when logging in from console port. This is how to activate it with telnet connection. This setup can not be saved, so you need to excute everytime as needed.
Router# terminal monitor
Disconnect forcibly
If you can not disconnect from telnet because the network or router has hung up.
Router# Ctl + Shift + 6 --->>> x
Router# disconnect
Connect with host name
Yon can use host name instead of IP address. Firstly you need to map which IP address belongs to which host name.
Router(config)# ip host host-name IP-address
For example,
Router(config)# ip host tokyo 192.168.10.1
Then you can use this host name for telnet connection.
Router# telnet tokyo