3Com 4500 PWR 26-PORT Loopback Syntax, External External loop test Internal Internal loop test

Ethernet Port Configuration Commands 51

Description

Use the command interface interface_type interface_number 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.

Example

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]

loopback Syntax

loopback { external internal }

View

Ethernet Port View

Parameter

external: External loop test.

internal: Internal loop test.

Description

Use the loopback 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.

Example

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