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This chapter contains the following sections:
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.
You have configured IP on a Layer 3 interface, out of band on the mgmt 0 interface.
Parameter |
Default |
---|---|
Telnet server |
Disabled |
Configuring Telnet
The Telnet server is enabled by default, but you can use this procedure to reenable it if necessary.
Before beginning this procedure, you must be logged in to the CLI in EXEC mode.
1. switch# configure terminal
2. switch(config)# feature telnet
3. switch(config)# show telnet server
4. (Optional) switch(config)# show telnet server
5. (Optional) switch(config)# copy running-config startup-config
switch# configure terminal switch(config)# feature telnet switch(config)# show telnet server telnet service enabled switch(config)# copy running-config startup-config
Before beginning this procedure, you must have done the following:
1. switch# telnet {ip address | host-name} [port-number] [vrf vrf-name]
switch# telnet 10.10.1.1
Before beginning this procedure, you must be logged in to the CLI in EXEC mode.
1. switch# show users
2. switch# clear line vty-line
3. (Optional) switch# show users
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#
Use one of the following commands to verify the configuration.
Command |
Purpose |
---|---|
show running-config security [all] |
Displays the user account configuration in the running configuration. The all keyword displays the default values for the user accounts. |
show telnet server |
Displays the telnet server configuration. |
show hosts |
Displays the configuration details for current hosts. |
show tcp connection |
Displays connection information. |
switch# show running-config security all version 4.0(1) username admin password 5 $1$xMw2Q/1S$ZEWRvyAxAJAFV0weuSPvg1 role network-admin username user2 password 5 $1$byNNnnSP$xfXVKjE5UEScvriwX3Kyj0 role network-operator username user2 sshkey ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAyKcb7Nv9Ki1OOId9/tdHHa/ngQujlvK5mXyL/n+DeOXKfVhHbX2a+V0cm7CCLUkBh+BvZRmpmOVTmU/5awfVhVxMKXMiPOPBc+A6/n3FVroyRwupMki6mW oM6UwaGID5gsVPqFjFNSgMWtbhjo97XVKhgjFW+wOVt8QoAcrEtnwEfsnQk1EIr/0XIP1mqTsrqTsmjZ2vLk+fFzTGYAxMvYZI+BrN47aoH2ywS7CpnODjCDXJuDYSPbc3PA8t0ghU/60m9R+s6AZPuljVQbGfxPrahEu4GVc6sMJNU1 JxmqDJkodhMArObB4Umzj7E3Rdby/ZWx/clTYiXQR1X1VfhQ== telnet server enable banner motd # User Access Verification # ssh key rsa 1024 force no ssh key dsa force ssh server enable
This table only includes updates for those releases that have resulted in additions to the feature.
Feature Name |
Feature Information |
|
---|---|---|
Telnet |
Release 5.2(1)IC1(1.1) |
This feature was introduced. |