Cisco Systems MDS 9500 Series manual Backplane and Clock Modules, Lower LEDs Upper LEDs

Chapter 1 Product Overview

Backplane and Clock Modules

Se 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 ck - 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 “Removing and Installing Clock Modules” section on page 2-76for information on replacing clock modules.

There are two LEDs per clock module. Figure 1-5shows the upper and lower LEDs.

Figure 1-5 Clock Module LEDs

	2
	CLOCK A	CLOCK B
		181336
	1
1	Lower LEDs	2	Upper LEDs

Table 1-1	Clock LEDs for the Cisco MDS 9500 Series Directors
LED		Status	Description
Upper LED		Green	Clock module is active and in use.
		Off	Clock module is in standby mode.
Lower LED		Green	Power supply is on and working properly.
		Red	Power supply is not in a stable state. If this
			indication continues after initial power on, check
			that all connections are secure.
		Off	Normal operation or power supply is turned off.

Cisco MDS 9500 Series Hardware Installation Guide

1-8 OL-17467-02