Cisco MDS 9200 Series Hardware Installation Guide (OL-16188-01, April 2008)

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Cisco MDS 9200 Series Hardware Installation Guide

OL-16188-01

Chapter 1 Product Overview

Fan Module

The Cisco MDS 9200 Series supports a hot-swappable fan module with four fans. The fan module

provides 80 cfm (cubic feet per minute) of cooling per slot, allowing 400 W of power dissipation per

slot. Sensors on the supervisor module monitor the internal air temperature. If the air temperature

exceeds a preset lower-level threshold, the environmental monitor displays warning messages. If the air

temperature exceeds a preset higher-level threshold, the switch will shut down.

If one or more fans within the fan module fail, the Fan Status LED turns red and the module must be

replaced. Individual fans cannot be replaced, you must replace the entire fan module. If the higher-level

temperature threshold is not exceeded, the switch continues to run for five minutes after the fan module

is removed. This means you can swap out a fan module without having to bring the system down. To

replace a fan module, see the “Removing and Installing the Fan Module” section on page 2-38. The fan

module has one Status LED that indicates the following conditions:

• Green—Fan module is operating normally.

• Red—One or more fans failed. Fan module should be replaced.

• Off—Fan module is not properly seated in the chassis or power supply has failed.

Caution The Cisco MDS 9000 Family switches have internal temperature sensors that are capable of shutting

down the system if the temperature at different points within the chassis exceed certain safety thresholds.

To be effective, the temperature sensors require the presence of airflow; therefore, in the event a fan

module is removed from the chassis, the Cisco MDS 9000 Family switches shut down after five minutes

to prevent potentially undetectable overheating. However, the switches shut down sooner if the

higher-level temperature threshold is exceeded.

Supported Transceivers

The following types of transceivers are available from Cisco and are supported on the Cisco MDS 9200

Series:

• X2 Fibre Channel transceivers

• Fibre Channel SFP transceivers, in either SWL or LWL

• Combination Fibre Channel/Gigabit Ethernet SFP transceivers, in either SWL or LWL

• Combination Fibre Channel/Gigabit Ethernet CWDM SFP transceivers, which can be used for

ELWL transmission or for CWDM

• Gigabit Ethernet SFP transceiver, 1-Gbps copper

• Fibre Channel DWDM SFP transceiver, which can be used for ELWL transmission or for DWDM

Note Switches running Cisco MDS SAN-OS Release 1.1(1a) or later support combination Fibre

Channel/Gigabit Ethernet SFP transceivers.

The transceivers are field-replaceable and hot-swappable. You can use any combination of SFP

transceivers that are supported by the switch. The only restrictions are that SWL transceivers must be

paired with SWL transceivers, and LWL transceivers with LWL transceivers, and the cable must not

exceed the stipulated cable length for reliable communications.