Switch Owner's Manual

Troubleshooting
204515-C 4-3
Table 4-1. LED Indications of Problems
Symptom Probable Cause Corrective Action
Green power supply
LEDs are off.
The switch is not receiving
AC power.
Verify that each AC power cord is fastened
securely at both ends and that power is available
at each AC power outlet. Verify that each power
supply is turned on.
The Link/Activity LED
for a connected port is
off or does not blink
(and you have reason to
believe that traffic is
present).
The switch is experiencing
a port connection problem.
See “Port Connection Problems
” next.
The switch’s link partner is
not autonegotiating properly.
The Link/Activity LED
blinks continuously.
There may be a port
configuration error.
The Online LED on an
I/O module is yellow.
Software incompatibility
exists, or the module cannot
communicate with the master
module over the backplane.
Use the show log command to check the
system log for indications of communication
problems. Use the boot command to download a
new software image.
The Master LED on a
module in slot 1 or slot 2
is yellow.
This module has detected
system clock generation
failure on its own circuitry.
Replace the module; make sure it is in the correct
slot.
Note: This LED refers only to the module in slot 1
or slot 2 that provides the clock function for the
switch.
The Fault LED is
blinking yellow.
A chassis failure has been
detected.
From the console management station, use the
show log command to check the system log for
information about hardware failures
Check the fans in the Passport 8100 module
chassis to make sure both are running.
Check the switch power supplies; one may have
stopped functioning.
The module may have failed to read the MAC
address from the chassis backplane. If this is the
case, arrange to replace the chassis.
The Fault LED is
steadily yellow.
A diagnostics failure or
hardware failure has been
detected.
The module failed its power-on self-test. Replace
the module.
No LEDs are lit. A hardware failure has been
detected.
Power cycle the switch.