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Updated:January 8, 2017
Copper Test on ESW2-550X Switches
The copper test is used to diagnose and troubleshoot problems related to the Ethernet cables. Gigabit Ethernet (GE) ports are often used for transmission of files of size more than 1Gb. GE ports offer speeds of up to 1000 Mbps (1Gbps). The Basic cable test is used to test the quality of the copper cable and its characteristics attached to the port. The Advanced cable test is used to test the length of the cable connected to the GE ports.
This article explains how to run copper test on ESW2-550X stackable managed switch.
• ESW2-550X • ESW2-550X-DC
Note: Basic cable test results are accurate if Short Reach is disabled and the advanced cable test results are accurate if Energy Efficient Ethernet (EEE) is disabled. Short reach and EEE can be disabled through Port Management > Properties. In the Properties page, uncheck the respective check boxes to disable them.
Step 1. Log in to the web configuration utility and choose Administration > Diagnostics > Copper Test. The Copper Test page opens:
Step 2. Choose the Unit/Slot on which the copper test is to be performed from the Unit/Slot drop-down list and the desired port from the Port drop-down list. The unit identifies the whether the switch is active or a member in the stack (unit 1 is active and unit 2 is member). If you are unfamiliar with the terms used, check out Cisco Business: Glossary of New Terms. The slot identifies whether the switch is ESW2-550 or ESW2-550X (slot 1 is ESW2-550 and slot 2 is ESW2-550X).
Step 3. Click Copper Test. A new window appears:
Step 4. Click OK to begin the test.
The Test Results area displays the result of the basic test and has the following fields:
• Last Update — The date and time of the most recent test performed on the port.
• Test Results — The results of the test of the cable.
– OK — The cable has passed the test.
– No Cable — There is no cable connected to the port.
– Open Cable — Only one side of the cable is connected.
– Short Cable — A short circuit has occurred in the cable.
– Unknown Test Result — An error occurred when the test was performed.
• Distance to Fault — Displays the distance to the fault from the port.
• Operational Port Status — Displays whether the port is in the up or down state.
The Copper Port Advanced Table displays the result of the advanced test and has the following fields:
• Cable Length — The length of the cable.
• Pair — Indicates the cable wire pair of the twisted pair cable that was tested.
• Status — Indicates the cable wire pair status.
– Red — Indicates a fault.
– Green — Indicates a status of OK.
• Channel — Indicates whether the cable channel used between the source and destination port is a straight cable or a cross-over cable.
• Polarity — Indicates whether automatic polarity detection and correction is activated for the cable wire pair or not. Automatic polarity detection and correction permits automatic adjustment of wiring errors on all ports.
• Pair Skew — Indicates the time difference in nanoseconds between the two wires in a twisted pair cable. It usually occurs when there is a difference in the twist per meter in the same cable.