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Cisco Small Business 300 Series Managed Switch Administration Guide 57
Managing Device Diagnostics
This chapter contains information for configuring port mirroring, running cable
tests, and viewing device operational information.
It includes the following topics:
• Testing Copper Ports
• Displaying Optical Module Status
• Configuring Port and VLAN Mirroring
• Viewing CPU Utilization
Testing Copper Ports
The Copper Ports Page
displays the results of integrated cable tests performed
on copper cables.
Two types of tests are used:
• Time Domain Reflectometry (TDR) technology tests the quality and
characteristics of a copper cable attached to a port. Cables of up to 100
meters long can be tested.
• DSP-based tests are performed on active GE links to measure length.
CAUTION When a port is tested, it is set to the Down state and communications are
interrupted. After the test, the port returns to the Up state. It is not recommended
that you run the copper port test on a port you are using to run the web-based
switch configuration utility, because communications with that device are
disrupted.
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