Troubleshooting Using The Port Status Leds - 3Com CoreBuilder 5000 User Manual

5-2 T
ROUBLESHOOTING
Troubleshooting
Using the Port
Status LEDs
A blinking Port Status indicator signals a problem with a port or a link
connected to a port. Once a port detects a problem, you can further
analyze the problem by counting the number of blinks.
outlines possible causes and some solutions for troubleshooting the
Port Status LEDs.
Table 5-2 Port Status LED Troubleshooting
LED State Indication Possible Cause
1 blink Link failure Cables not connected
2 blinks Port
partitioned
3 blinks Port jabber Faulty node connection Reset.
4 blinks Link
unstable
or isolated
Off Ports
disabled
Cables broken
Speed mismatch
Connected device not
powered on or it is
faulty
Faulty cable
Looped network
Due to carrier integrity
failure or an
intermittent cable fault
Ports disabled
12-port 100BASE-TX
Module not powered
Broken LED
Bad 12-port
100BASE-TX module
Table 5-2
Corrective Action
Connect cables.
Check cables using cable
tester. Repair or replace cables.
Check network speeds.
Check on connection.
Check cable using cable tester.
Repair or replace cable.
Check network wiring
topology and remove any loops
that have been created.
Check connections.
Enable ports.
Check the controller module
Power LEDs.
Press the LED test on the
controller module.
Replace module.