3Com 3C17203 - SuperStack 3 Switch 4400, Руководство по внедрению

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Problem Solving 119
4 Click Reset Meters if you want to reset the Average Power and Peak
Power.
5 Click OK when you have finished.
Displaying a Graphical Summary
The Switch can also display a graphical summary of the state of ports and
the power they supply. To view the graphical summary:
1 Log into the Web interface.
2 From the Device View , click Display Filter . The Display Filter screen will be
displayed.
3 Select Powered Ports from the drop-down box and click OK . The Web
interface will display Power over Ethernet information in place of the
Ethernet ports. The Web interface will show each port as:
■
Black — if the port is inactive.
■
Black with a green bar — if the port is active. The height of the bar
shows the level of power being drawn.
■
Gray — if the port has been disabled.
■
Red — if there is a Power over Ethernet fault on the port.
Problem Solving
If a device is not supplied with power after you have connected it to the
Switch 4400 PWR, check the following:
■
The device is Power over Ethernet compliant and is configured to
receive its power over Ethernet. See the documentation supplied with
your device.
■
The port you are using has been enabled for Power over Ethernet use
(the default setting). See
“Configuring a Guaranteed Power Plan” on
page 116 .
■
The power budget for the port has not been exceeded. See
“Calculating Power Budgets” on page 114 .
■
The power budget for the Switch has not been exceeded. See
“Calculating Power Budgets” on page 114 .
Category 5 cables or better are required for 100 Mbps or Power over
Ethernet use.