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Overview of Fan Trays
Power Inputs
1 input (210 V)
Note
A combination of 3-kW DC and 3.5-kW HVAC/HVDC power supplies can be used.
Overview of Fan Trays
The Cisco Nexus 7710 switch supports two types of fan trays:
• 38 mm Gen 1 Fan Tray (N77-C7710-FAN)
• 76 mm Gen 2 Fan Tray (N77-C7710-FAN-2)—Use this fan tray for Network Equipment Building System
Note
During normal switch operations, all 3 fan trays in a switch should be of the same type.
Fan trays provide airflow through a 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
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
82
Power Supplies
1
2
3
4
5
6
7
8
(NEBS) compliance when the Cisco Nexus 7700 M3-Series 12-port 100-Gigabit Ethernet I/O module
(N77-M312CQ-26L) or the Cisco Nexus 7700 F4-Series 30-port 100-Gigabit Ethernet I/O module
(N77-F430CQ-36) is installed on the switch.
functioning. When a fan fails within a tray, the functioning fans in the module increase their speed to
compensate for the failed fans. If a fan fails, the failed fan has to be replaced.
The following is a sample output displaying a fan failure, along with the associated syslogs:
switch# show environment fan
Fan:
------------------------------------------------------
Fan
Model
------------------------------------------------------
Combined Mode
Power Supply
Redundancy
Mode
3100 W
—
6200 W
3100 W
9300 W
6200 W
12,400 W
9300 W
15,500 W
12,400 W
18,600 W
15,500 W
21,700 W
18,600 W
24,800 W
21,700 W
Hw
Managing the Switch
Input Source
Full Redundancy
Redundancy
Mode
Mode
—
—
3100 W
3100 W
3100 W
3100 W
6200 W
6200 W
6200 W
6200 W
9300 W
9300 W
9300 W
9300 W
12,400 W
12,400 W
Status
OL-30452-01.
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