Cisco SR224T Administration Guide - Page 61

7 Managing Device Diagnostics This section contains information for configuring port mirroring, running cable tests, and viewing device operational information. It covers the following topics: • Testing Copper Ports • Displaying Optical Module Status • Configuring Port and VLAN Mirroring • Viewing CPU Utilization and Secure Core Technology Testing Copper Ports The Copper Test page displays the results of integrated cable tests performed on copper cables by the Virtual Cable Tester (VCT). VCT performs two types of tests: • Time Domain Reflectometry (TDR) technology tests the quality and characteristics of a copper cable attached to a port. Cables of up to 140 meters long can be tested. These results are displayed in the Test Results block of the Copper Test page. • DSP-based tests are performed on active GE links to measure cable length. These results are displayed in the Advanced Information block of the Copper Test page. Preconditions to Running the Copper Port Test Before running the test, do the following: • (Mandatory) Disable Short Reach mode (see the Port Management > Green Ethernet > Properties page) Cisco Small Business 200 Series Smart Switch Administration Guide 62