S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
4-5
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 4 Troubleshooting Hardware
Troubleshooting Power Supply Issues
Power Supply Input Ok LED is Red
Symptom
Power supply Input Ok LED is red.
Table 4-1
All Power Supply LEDS Are Off
Symptom
Possible Cause
Solution
All power supply
LEDS are off.
Power supply is not correctly seated in
the chassis.
Remove and reinstall the power supply. Refer to the
appropriate hardware installation guide for your chassis.
Power supply is shut down.
Choose
Physical > Power Supplies
and check the
OperStatus on Device Manager, or use the
show
environment power
CLI command to determine if the
power supply is shut down. If the status is shutdown, then
the supervisor has shutdown the power supply. The supervisor
shuts down the lower capacity power supply only if it detects
a mismatched pair of power supplies and the mode is
redundant or if there is a transition from combined to
redundant mode. If both power supplies are the same capacity
or the mode is combined, Cisco SAN-OS never shuts down a
power supply.
Power supply is not operational.
Troubleshoot the power supplies. See the
“Troubleshooting
the Power Supplies” section on page 4-7
.
Table 4-2
Power Supply INput Ok LED Is Red
Symptom
Possible Cause
Solution
Power supply Input
Ok LED is red.
Power supply is not correctly seated in
the chassis.
Remove and reinstall the power supply. Refer to the
appropriate hardware installation guide for your chassis.
PEMs on a Cisco MDS 9500 Series
chassis are not correctly installed.
Remove and reinstall the power supply PEMs. Refer to the
appropriate hardware installation guide for your chassis.
External power source is not operational. Power down the switch and verify the external power
source. Use independent power sources to each redundant
power supply in a Cisco MDS 9500 Series director.
Power supply is not operational.
Troubleshoot the power supplies. See the
“Troubleshooting
the Power Supplies” section on page 4-7
.