Cabletron Systems 3T02-04 Manual Do Utilizador

Chapter 5: Diagnostics and Troubleshooting

After completion of the power-up diagnostic sequence, all status LEDs on 
the ATX front panel should be on (lit), indicating that the modules have 
passed the power-up tests.

Built-in local and remote loopback tests can be used 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 port’s network. The destination device echoes the packet back onto the 
network, and the originating port receives the packet.

RX

Token Ring port is receiving data (LED flashes)

ST

Ring status of port, on if port is inserted into the ring

PROC

Token Ring processor is ready for operation (LED on)

TX

Token Ring port is transmitting data (LED flashes)

16

If LED is on, then port ring speed is set for 16 Mbps, if not on then 
port ring speed is set for 4 Mbps

POWER

Token Ring module hardware is receiving power (LED on)