Backplane And Clock Modules - Cisco MDS 9500 Series Hardware Installation Manual

Backplane and Clock Modules

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
Backplane and Clock Modules
The Cisco MDS 9500 Series includes one or more clock modules that are accessible from the back of
the chassis. The Cisco MDS 9513 and 9509 Directors have two field-replaceable clock modules for
redundancy and failover. The Cisco MDS 9506 Director has one field-replaceable clock module. In the
unlikely event of a clock module failure, the Cisco MDS 9500 Series generates an error message and a
switchover from one clock module to the other, causing the system to reset automatically. Cisco
recommends that the failed clock module be replaced during a maintenance window. See the
and Installing Clock Modules" section on page 2-76
There are two LEDs per clock module.
Figure 1-5
1 Lower LEDs
Table 1-1
LED
Upper LED
Lower LED
Cisco MDS 9500 Series Hardware Installation Guide
1-8
Clock Module LEDs
2
CLOCK A CLOCK B
1
Clock LEDs for the Cisco MDS 9500 Series Directors
Status
Green
Off
Green
Red
Off
for information on replacing clock modules.
Figure 1-5 shows the upper and lower LEDs.
2
Upper LEDs
Description
Clock module is active and in use.
Clock module is in standby mode.
Power supply is on and working properly.
Power supply is not in a stable state. If this
indication continues after initial power on, check
that all connections are secure.
Normal operation or power supply is turned off.
Chapter 1 Product Overview
"Removing
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