Cabletron Systems 3H02-04, 3H08-04 manual Operational Diagnostics, Diagnostics and Troubleshooting

Chapter 5: Diagnostics and Troubleshooting

	Table 5-1 Meaning of 3H02-04 LED Indicators
LED		Meaning
LK		100BASE-TX port is connected to another device by a cable;
		both the cable and port are working correctly
RX		100BASE-TX port is receiving data (LED flashes)
TX		100BASE-TX port is transmitting data (LED flashes)
PROC		Switch module processor is ready for operation
PWR		Switch module hardware is receiving power

	Table 5-2 Meaning of 3H08-04 LED Indicators
LED	Meaning
LK	100BASE-FX port is connected to another device by a cable;
	both the cable and port are working correctly
RX	100BASE-FX port is receiving data (LED flashes)
TX	100BASE-FX port is transmitting data (LED flashes)
PROC	Switch module is ready for operation
PWR	Switch module hardware is receiving power

5.3 OPERATIONAL DIAGNOSTICS

You can use local and remote loopback tests to test individual ports while the ATX is operational. When in local loopback, a port is disconnected from its network. The ATX generates loopback packets for the port, and the port loops the packets back without sending them onto its network.

During a remote loopback test, the port is in normal operation, sending and receiving packets to its network. The ATX generates loopback packets which are sent out of the port to a particular destination device on the ports network. The destination device echoes the packet back onto the network, and the originating port receives the packet.

Page 5-2 FE Switch Module User Guide