Allied Telesis X8106 manual Twisted Pair Ports

SwitchBlade x8106 Chassis Switch Installation Guide

Twisted Pair Ports

The ports on the AT-SBx81GT24 and AT-SBx81GP24 Line Cards have L/A LEDs that are solid or flashing green when the ports are operating at 1000 Mbps, and solid or flashing amber at 10 or 100 Mbps. 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 end node 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 the end node.

Make sure that the twisted pair cable does not exceed 100 m (328 ft).

Refer to Table 1 on page 33 and Table 2 on page 34 to verify the appropriate categories of twisted-pair cables for the AT- SBx81GT24 and AT-SBx81GP24 Line Cards, respectively.

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 port on the line card and the parameters of the end node are compatible.

If the L/A LED for a port is green, signalling a link to the network device, but link performance is poor or intermittent, the problem may be from a bad cable. Try replacing the cable, as explained in “Cabling Guidelines for the Twisted Pair Ports on the AT-SBx81GT24,AT-SBx81GP24, and AT- SBx81GT40 Line Cards” on page 126.

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 on the AT-SBx81GT24 and AT-SBx81GP24 Line Cards 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 or 10 or 100 Mbps. For those switch ports, you should disable Auto-Negotiation and set the port’s speed manually to match the speeds of the network devices.

The ports must be set to Auto-Negotiation, the default setting, to operate at 1000Mbps.

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