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Cisco ONS 15530 Configuration Guide and Command Reference
78-16019-02, Cisco IOS Release 12.2(18)SV2
Chapter3 Initial Configuration
About Fan Failure Shutdown
About Fan Failure Shutdown
The Cisco ONS 15530 fan assembly is located at the bottom of the chassis and contains six individual
fansand a fan controller board. The controller board monitors the status of each fan and reports the status
to the CPU switch modules.
If a single fan fails,a minor alarm is reported to the CPU switch module. However, the chassis will never
reach a critical high temperature when only one fan fails.
If two or more fans fail, a major alarm is reported to the CPU switch module.
If all six fans in the fan tray fail, the chassis will reach critical temperature after 4 minutes.
Toprevent damage to the cards and modules in the shelf when two or more fans fail, you can configure
the system to automatically reset the following cards:
•ESCON aggregation cards
•8-port FC/GE aggregations cards
•2.5-Gbps ITU trunk cards
•10-Gbps ITU trunk cards
•Transponder line cards
In addition, the ITU lasers on the transponder line cards are powered off.
To recover from fan failure shutdown, you must power-cycle the shelf.
Caution Do not savethe startup configuration file after the line cards shutdown. This action would result in losing
the previous startup configuration.
Caution The fan failure shutdown feature disrupts traffic on the shelf when two or more fans fail.
Configuring Fan Failure Shutdown
Toconfigure the system to automatically shut down when two or more fans fail, use the following global
configuration command:
Note The system will start powering offor resetting the transponder modules about 2 minutes after detecting
that two or more fans have failed.
Example
The following example shows how to enable fan tray failure shutdown:
Switch(config)# environment-monitor shutdown fan
Command Purpose
environment-monitor shutdown fan Enables fan tray failure shutdown.