Logging In to H3C S3100 Switch Through Telnet/SSH

You can telnet to a switch and then configure the switch if the interface of the management VLAN of the switch is assigned with an IP address. (By default, VLAN 1 is the management VLAN.)
Following are procedures to establish a Telnet connection to a switch:

Step 1: Log in to the switch through the Console port, enable the Telnet server function and assign an IP address to the management VLAN interface of the switch.

Connect to the Console port. Refer to Setting Up the Connection to the Console Port.
Execute the following commands in the terminal window to enable the Telnet server function and assign an IP address to the management VLAN interface of the switch.

# Enable the Telnet server function and configure the IP address of the management VLAN interface as 202.38.160.92, and .the subnet mask as 255.255.255.0.

<sysname> system-view
[Sysname] telnet server enable
[Sysname] interface vlan-interface 1
[Sysname-Vlan-interface1] ip address 202.38.160.92 255.255.255.0

Step 2: Before Telnet users can log in to the switch, corresponding configurations should have been performed on the switch according to different authentication modes for them. Refer to Telnet Configuration with Authentication Mode Being None, Telnet Configuration with Authentication Mode Being Password, and Telnet Configuration with Authentication Mode Being Scheme for details. By default, Telnet users need to pass the password authentication to login.

Step 3: Connect your PC to the Switch, as shown in Figure 3-1. Make sure the Ethernet port to which your PC is connected belongs to the management VLAN of the switch and the route between your PC and the switch is available.

Figure 3-1 Network diagram for Telnet connection establishment

Step 4: Launch Telnet on your PC, with the IP address of the management VLAN interface of the switch as the parameter, as shown in the following figure.

Figure 3-2 Launch Telnet

Step 5: Enter the password when the Telnet window displays “Login authentication” and prompts for login password. The CLI prompt (such as ) appears if the password is correct. If all VTY user interfaces of the switch are in use, you will fail to establish the connection and receive the message that says “All user interfaces are used, please try later!”. A H3C series Ethernet switch can accommodate up to 16 Telnet connections at same time.

Step 6: After successfully Telnetting to a switch, you can configure the switch or display the information about the switch by executing corresponding commands. You can also type ? at any time for help. Refer to the following chapters for the information about the commands.

Note
A Telnet connection will be terminated if you delete or modify the IP address of the VLAN interface in the Telnet session.
By default, commands of level 0 are available to Telnet users authenticated by password. Refer to Basic System Configuration for information about command hierarchy.

Reference :
http://www.h3c.com/portal/Technical_Support___Documents/Technical_Documents/Switches/H3C_S5120_Series_Switches/Configuration/Operation_Manual/H3C_S5120-SI_CG-Release_1101-6W105/201108/723570_1285_0.htm#_Toc300908306

SSH Operation