Enable or Disable Telnet service

In privileged EXEC mode, enter global configuration mode.
```
device# configure terminal
```

Disable Telnet service on the device.

device(config)# telnet server use-vrf ?
Possible completions:
  <VRF Name> Provide the vrf (mgmt-vrf,default-vrf or <user defined vrf>) on which to start/stop telnet server
device# telnet server use-vrf red shutdown

All Telnet sessions including any currently active sessions are immediately terminated, and cannot be re-established until the service is re-enabled.

Enable Telnet service on the device.
```
device(config)# no telnet server use-vrf red shutdown
```
Note
The shutdown option for a given VRF is displayed only when the Telnet server was configured and then shutdown on that VRF. Otherwise, the VRF name and shutdown option are not displayed for the no form of the command.