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Configuration Guide - Basic Configuration

S7700 and S9700 V200R010C00

This document describes methods to use command line interface and to log in to the device, file operations, and system startup configurations.
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(Optional) Using Telnet to Log In to Another Device From the Local Device

(Optional) Using Telnet to Log In to Another Device From the Local Device

Context

A device can function as a Telnet server to allow other devices to log in or as a Telnet client to log in to other devices. When a terminal lacks the necessary software or no reachable route exists between the terminal and target device, you can log in to an intermediate device and then use Telnet to log in to the target device from the intermediate device. The intermediate device functions as a Telnet client.

The device can function as a Telnet IPv6 client. You can specify the source address or interface of the Telnet client to ensure security of the management IP address and specify a VPN instance to implement remote Telnet login across private networks.

As shown in Figure 5-4, a PC connects to a device through network 1 and the device connects to a Telnet server through network 2. The PC cannot directly communicate with the Telnet server. In this situation, you can configure the device as a Telnet client and log in to the Telnet server from the device.
Figure 5-4  Configuring a device as a Telnet client to log in to another device

Pre-configuration Tasks

Before configuring a device as a Telnet client to log in to another device, complete the following tasks:

  • Log in to the device from a terminal.
  • Configure a reachable route between the device and Telnet server.
  • Enable the Telnet server function on the Telnet server.
  • Obtain the Telnet user name, password, and port number configured on the Telnet server.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. (Optional) Run:

    telnet client-source { -a source-ip-address | -i interface-type interface-number }

    The source IP address of the Telnet client is set.

    The source address of the Telnet client displayed on the server is the same as that configured in this step.

  3. Run:

    quit

    Exit the system view.

  4. Run either of the following commands to log in to another device based on the network address type.

    • In IPv4 mode, run the telnet [ vpn-instance vpn-instance-name ] [ -a source-ip-address | -i interface-type interface-number ] host-ip [ port-number ] command to log in to another device as a Telnet client.

    • In IPv6 mode, run the telnet ipv6 [ -a source-ip-address ] [ vpn6-instance vpn6-instance-name ] host-ipv6 [ -oi interface-type interface-number ] [ port-number ] command to log in to another device as a Telnet IPv6 client.

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Updated: 2019-04-18

Document ID: EDOC1000141895

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