Overview Of Fan Trays - Cisco Nexus 7706 Hardware Installation Manual

Overview of Fan Trays

Power Inputs
1 input
Overview of Fan Trays
Fan trays provide airflow through the switch for cooling. Each fan tray contains multiple fans to provide
redundancy. The switch can continue functioning in the following situations:
• One or more fans fail within a fan tray—Even with multiple fan failures, the switch can continue
• The fan tray is removed for replacement—The fan tray is designed to be removed and replaced while
When a fan fails or when you remove a fan tray, the remaining operating fans speed up to compensate for
Note
the loss of fans. This can increase the noise made by the fan trays until you replace the missing fan tray
or replace the defective fan tray.
When replacing a failed fan tray in a running system, be sure to promptly replace the fan tray.
Note
If one or more fans fail within a fan tray, the Fan Status LED turns red. A fan failure could lead to
Tip
temperature alarms if not corrected immediately.
The fan status is continuously monitored by the software. In case of a fan failure, the following actions occur:
• System messages are displayed.
• Call Home alerts are sent (if configured).
• SNMP notifications are sent (if configured).
Each of the three fan trays cover two fabric modules as follows:
• Fan tray in slot 41 covers the fabric modules in slots 21 and 22.
• Fan tray in slot 42 covers the fabric modules in slots 23 and 24.
Cisco Nexus 7706 Hardware Installation Guide
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Power Supplies
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2
3
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functioning. When a fan fails within a tray, the functioning fans in the module increase their speed to
compensate for the failed fans.
the switch is operating without presenting an electrical hazard or damage to the switch.
Combined Mode Power Supply
Redundancy
Mode
3000 W —
6000 W 3000 W
9000 W 6000 W
12000 W 9000 W
Managing the Switch
Input Source Full Redundancy
Redundancy Mode
Mode
— —
3000 W 3000 W
3000 W 3000 W
6000 W 6000 W
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