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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Allied Telesis X8106 manual Twisted Pair Ports