Allied Telesis AT-SB*81CFC960, Руководство по установке

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SwitchBlade x8106 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section II: Installing the Chassis 245
Twisted Pair Ports
This section applies to the twisted pair ports on the following devices:
 AT-SBx81GT24 Line Card
 AT-SBx81GT40 Line Card
 AT-SBx81GP24 Line Card
 AT-SBx81XLEM/XT4 Expansion Module
 AT-SBx81XLEM/GT8 Expansion Module
If a port is cabled to a network device but the L/A LED is off, try the
following:
 If all the L/A LEDs on the cards are off, try pressing the eco-friendly
button on the active master controller card to verify that the LEDs
on the line cards are on.
 Verify that the network device connected to the port is powered on
and operating properly.

Check that the twisted pair cable is securely connected to the ports
on the line card and network device.
 Make sure that the twisted pair cable does not exceed 100 m (328
ft).
 Verify that you are using the appropriate category of cable by
referring to the appropriate table in “Cable Requirements” on
page 65.

Verify that the twisted-pair cable is not faulty by replacing it with a
known good cable.
 Make sure that the operating parameters of the ports on the line
card and network device are compatible.
If the L/A LED for a port is on, signalling a link to the network device, but
performance is poor or intermittent, the problem may be from a bad cable.
Try replacing the cable.
Another source of poor or intermittent performance on a link can be a
speed or duplex mode mismatch between a port and network device. Here
are some items to consider when resolving this type of problem:

The default speed setting for the ports is Auto-Negotiation. This
setting is appropriate for ports connected to network devices that
also support Aut-Negotiation.
 The default speed setting of Auto-Negotiation is not appropriate for
ports connected to network devices that do not support Auto-
Negotiation and have fixed speeds. For those switch ports, you
should disable Auto-Negotiation and set the port’s speed manually