Figure 9-1 Telnet Client Services; Overview Of User Login; Telnet Terminal Services - Huawei Quidway NetEngine 20 series Configuration Manual

9 Telnet and SSH

9.1.1 Overview of User Login

To configure, monitor and maintain the local or remote devices, configure the user interface,
the user management and the terminal service.
The user interface provides the login plane. The user management guarantees the login
security and the terminal service provides the login protocol.
The product supports the following login methods:

9.1.2 Telnet Terminal Services

When the number of remote login users reaches to the maximum number of VTY user
interfaces, the system prompts that all user interfaces are in use and you cannot use Telnet to
log in.
Telnet is an application layer protocol in the TCP/IP protocol suite. It provides remote login
and a virtual terminal service through the network.
The router provides the following Telnet services:

Figure 9-1 Telnet client services

PC
9-2
Login through the console port
Local or remote login through the AUX port
Local or remote login through Telnet or SSH
Telnet server: You can run the Telnet client program on a PC to log in to the router,
configure and manage it.
Telnet client: You can run the terminal emulation program or the Telnet client program
on a PC to connect with the router. With the telnet command, you can log in to other
routers to configure and mange them. As shown in
the Telnet server and the Telnet client.
Telnet Session 1
Interruption of Telnet services
In Telnet connection, you can use two types of shortcut keys to interrupt the connection.
As shown in Figure 9-2
in to Router C through Telnet. Thus, a cascade network is formed. In this case, Router A
is the client of Router B and Router B is the client of Router C.
usage of the two types of shortcut keys.
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Configuration Guide - Basic Configurations
Telnet Session 2
RouterA
, Router A logs in to Router B through Telnet, and Router B logs
Quidway NetEngine20/20E
Figure 9-1, Router A serves as both
Telnet Server
RouterB
Figure 9-2
Issue 05 (2010-01-30)
illustrates the