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Managing the Switch
Power Inputs
1 input (380 V)
1 input (220/240
V)
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 7706 switch supports two types of fan trays:
• 38 mm Gen 1 Fan Tray (N77-C7706-FAN)
• 76 mm Gen 2 Fan Tray (N77-C7706-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
OL-31330-01
Power Supplies
1
2
3
4
1
2
3
4
1
2
3
4
(NEBS) compliance when the Cisco Nexus 7700 M3-Series 12-port 100-Gigabit Ethernet I/O module
(N77-M312CQ-26L) 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.
Combined Mode
Power Supply
Redundancy
Mode
3,500 W
—
7,000 W
3,500 W
10,500 W
7,000 W
14,000 W
10,500 W
3,500 W
—
7,000 W
3,500 W
10,500 W
7,000 W
14,000 W
10,500 W
3,100 W
—
6,200 W
3,100 W
9,300 W
6,200 W
12,400 W
9,300 W
Cisco Nexus 7706 Hardware Installation Guide
Overview of Fan Trays
Input Source
Full Redundancy
Redundancy
Mode
Mode
—
—
3,500 W
3,500 W
3,500 W
3,500 W
7,000 W
7,000 W
—
—
3,500 W
3,500 W
3,500 W
3,500 W
7,000 W
7,000 W
—
—
3,100 W
3,100 W
3,100 W
3,100 W
6,200 W
6,200 W
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