Allied Telesis AT-GS900/8PS Slow Network Performance, LINK/ACT LED Intermittently Blinking

AT-GS900/8PS Switch Installation Guide

a different cable. If the port is able to establish a link, then the problem is with the cable or with the other network device.

If the remote network device is a managed device, use its management firmware to determine whether its port is enabled.

Test the attenuation on the fiber optic cable with a fiber optic tester to determine whether the optical signal is too weak (sensitivity) or too strong (maximum input power).

Slow Network Performance

Problem: Network performance between a twisted pair port on the switch and a network device is slow.

Solution: There might be a duplex mode mismatch between the port and the network device. Since the AT-GS900/8PS copper ports are always configured for Auto-Negotiation, they will default to half duplex mode if the corresponding link partner is configured for a fixed duplex mode. This may slow the transfer of Ethernet traffic. If this is the cause of the problem, adjust the duplex mode of the port on the network device to Auto- Negotiation so they can agree on the same duplex mode.

LINK/ACT LED Intermittently Blinking

Problem: A port’s LINK/ACT LED is intermittently blinking.

Solutions: The link between the port and the network device is intermittent. Try the following:

Connect another network device with a different cable to the port. If the Link LED remains steady on, then the problem is with the original cable or the network device.

If the problem is with an SFP transceiver, check that the transceiver is fully inserted in the slot.

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