Module Installation Guide 2005-12

14
Troubleshooting
Troubleshooting
One of the primary tools for troubleshooting the switch module is the LEDs
on the front of the switch and on the module. Refer to “LED Behavior” on
page 8 for a description of the normal LED behavior. Also, refer to the switch
Installation and Getting Started Guide for more detailed troubleshooting
information for the switch.
LED Error Indicators:
Diagnostic Tips:
See the table on the next page to diagnose the LED error indicators in the
previous table.
Switch LEDs Module LEDs
Fault Test Module
Status
Module (Mdl)
Status
Link Activity Diagnostic
Tips
Blinking
1
Blinking
1
Blinking
1
Blinking
1
➊
Blinking Blinking Blinking On Blinking Off
➋
Off Off On Off with cable
connected
➌
Blinking On Blinking Off
3
3
➍
Blinking Blinking Blinking
➎
1
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.
2
The fast blinking behavior is an on/off cycle once every 0.8 seconds, approximately.
3
This LED is not important for the diagnosis.
Tip
Number
Problem Solution
➊
The network port for
which the Link LED is
blinking has
experienced a self test
or initialization failure.
During the module self test (described in item 1 above), each network port is also
tested. If the port self test fails, the individual port is not usable, but the rest of
the ports on the module, which have passed their self test, will continue to
operate normally.
➋
A port on the
expansion yl module
has a failure
If it is a Media Flex port, try reseating the transceiver. If it is a fixed copper port,
you may have to replace the module.