3com 4500 50-PORT User Manual

Use the command 

 to enter the 

interface of the specified port.

If you want to configure the parameters of an Ethernet port, you must first use 
this command to enter the Ethernet port view.

To enter the interface for port “Ethernet1/0/1”, enter the following:

<4500>system-view

System View: return to User View with Ctrl+Z.

[4500]interface ethernet1/0/1

[4500-ethernet1/0/1]

Ethernet Port View

 External loop test.

 Internal loop test.

Use the 

 command to configure the Ethernet port to perform the 

loopback test to check if the Ethernet port works normally. The loop test will finish 
automatically after being performed for a while.

By default, the Ethernet port will not perform the loopback test.

To perform the internal loop test for Ethernet1/0/1, enter the following:

<4500>system-view

System View: return to User View with Ctrl+Z.

[4500]interface ethernet 1/0/1

[4500-Ethernet1/0/1]loopback internal

#Apr  2 02:46:02:29 2000 4500 L2INF/2/PORT LINK STATUS CHANGE:- 1 -

 Trap 1.3.6.1.6.3.1.1.5.4: portIndex is 4227626, ifAdminStatus is 1, 

ifOperStatus is 1

%Apr  2 02:46:02:225 2000 4500 L2INF/5/PORT LINK STATUS CHANGE:- 1 - 

Ethernet1/0/1: is UP

%Apr  2 02:46:02:342 2000 4500 STP/2/SPEED:- 1 -Ethernet1/0/1's 

speed changed

!

#Apr  2 02:46:02:521 2000 4500 L2INF/2/PORT LINK STATUS CHANGE:- 1 

-Trap 1.3.6.1.6.3.1.1.5.3: portIndex is 4227626, ifAdminStatus is 1, 

ifOperStatus is 2