60 CHAPTER 3: LOGGING IN THROUGH TELNET
Figure 13 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 14 Launch Telnet
Step 5: Enter the password when the Telnet window displays “Login
authentication” and prompts for login password. The CLI prompt (such as
<SW4800G>) 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 3Com series Ethernet
switch can accommodate up to five 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.
n
■ 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 “Configuring User Levels and Command Levels” on page
1026 for information about command hierarchy.
Telnetting to Another
Switch from the Current
Switch
You can Telnet to another switch from the current switch. In this case, the current
switch operates as the client, and the other operates as the server. If the
interconnected Ethernet ports of the two switches are in the same LAN segment,
make sure the IP addresses of the two management VLAN interfaces to which the
Configuration PC
running Telnet
Ethernet
WorkstationServer
Workstation
Ethernet port
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