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Contents
- Configuring Telnet
- Information About the Telnet Server
- Prerequisites for Telnet
- Guidelines and Limitations for Telnet
- Default Setting for Telnet
- Configuring Telnet
- Enabling the Telnet Server
- Starting an IP Telnet Session to a Remote Device
- Clearing Telnet Sessions
- Verifying the Telnet Configuration
- Feature History for Telnet
Configuring Telnet
This chapter contains the following sections:
- Information About the Telnet Server
- Prerequisites for Telnet
- Guidelines and Limitations for Telnet
- Default Setting for Telnet
- Configuring Telnet
- Verifying the Telnet Configuration
- Feature History for Telnet
Information About the Telnet Server
The Telnet protocol enables you to set up TCP/IP connections to a host. Telnet allows a user at one site to establish a TCP connection to a login server at another site and then pass the keystrokes from one device to the other. Telnet can accept either an IP address or a domain name as the remote device address.
Prerequisites for Telnet
You have configured IP on a Layer 3 interface, out of band on the mgmt 0 interface.
Configuring Telnet
Enabling the Telnet Server
ProcedureStarting an IP Telnet Session to a Remote Device
Clearing Telnet Sessions
Procedure
Command or Action Purpose The following example clears a Telnet session:
switch# show users NAME LINE TIME IDLE PID COMMENT admin tty1 Jul 25 19:13 old 2867 admin pts/1 Jul 28 14:04 . 31453 (::ffff:171.70.209.8) admin pts/2 Jul 28 14:04 . 31475 (171.70.209.8)* switch# clear line 1 switch# show users NAME LINE TIME IDLE PID COMMENT admin tty1 Jul 25 19:13 old 2867 admin pts/2 Jul 28 14:04 . 31475 (171.70.209.8)* switch#Verifying the Telnet Configuration
Use one of the following commands to verify the configuration:
Command
Purpose
show running-config security [all]
Displays the SSH and user account configuration in the running configuration. The all keyword displays the default values for the SSH and user accounts.
show telnet server
Displays the Telnet server configuration.
show hosts
Displays the configuration details for current hosts.
Example 1: show running-config security all
The following example displays the user account configuration in the running configuration for :
switch(config)# show running-config security all !Command: show running-config security all !Time: Tue Sep 17 22:04:20 2013 version 5.2(1)SK1(2.1) feature telnet feature http-server no feature scp-server no feature sftp-server feature ssh username adminbackup password 5 ! role network-operator username admin password 5 $1$qnBf/DZs$SADurdd7yy/VMA19E./N11 role network-admin username admin keypair rsa username ajidas password 5 $1$L8yMjMMy$xIGNCA.CkgnVY70nBqnhr1 expire 2020-12-30 role network-operator password strength-check banner motd #Nexus 1000v Switch # ssh key rsa 2048 no ssh key dsa