Cisco Nexus 9504 Manual

Preparing the Site
•Temperature Requirements, page 1
•Humidity Requirements, page 1
•Altitude Requirements, page 2
•Dust and Particulate Requirements, page 2
•Minimizing Electromagnetic and Radio Frequency Interference, page 2
•Shock and Vibration Requirements, page 3
•Grounding Requirements, page 3
•Planning for Power Requirements, page 3
•Rack and Cabinet Requirements, page 6
•Clearance Requirements, page 7
Temperature Requirements
The switch requires a operating temperature of 32 to 104° F (0 to 40° C). If the switch is not operating, the
temperature must be between –40 to 158° F (–40 to 70° C).
Humidity Requirements
High humidity can cause moisture to enter the switch. Moisture can cause corrosion of internal components
and degradation of properties such as electrical resistance, thermal conductivity, physical strength, and size.
The switch is rated to operate at 8 to 80 percent relative humidity, with a humidity gradation of 10 percent
per hour. For nonoperating conditions, the switch can withstand from 5 to 95 percent relative humidity.
Buildings in which the climate is controlled by air-conditioning in the warmer months and by heat during the
colder months usually maintain an acceptable level of humidity for the switch equipment. However, if the
switch is located in an unusually humid location, you should use a dehumidifier to maintain the humidity
within an acceptable range.
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Altitude Requirements
If you operate a switch at a high altitude (low pressure), the efficiency of forced and convection cooling is
reduced and can result in electrical problems that are related to arcing and corona effects. This condition can
also cause sealed components with internal pressure, such as electrolytic capacitors, to fail or to perform at a
reduced efficiency. This switch is rated to operate at altitudes from –500 to 13,123 feet (–152 to 4,000 meters).
You can store the switch at altitudes of –1,000 to 30,000 feet (–305 to 9,144 meters).
Dust and Particulate Requirements
Exhaust fans cool power supplies and system fan trays cool switches by drawing in air and exhausting air out
through various openings in the chassis. However, fans also ingest dust and other particles, causing contaminant
buildup in the switch and increased internal chassis temperature. A clean operating environment can greatly
reduce the negative effects of dust and other particles, which act as insulators and interfere with the mechanical
components in the switch.
In addition to regular cleaning, follow these precautions to avoid contamination of your switch:
•Do not permit smoking near the switch.
•Do not permit food or drink near the switch.
Minimizing Electromagnetic and Radio Frequency Interference
Electromagnetic interference (EMI) and radio frequency interference (RFI) from the switch can adversely
affect other devices such as radio and television (TV) receivers operating near the switch. Radio frequencies
that emanate from the switch can also interfere with cordless and low-power telephones. Conversely, RFI
from high-power telephones can cause spurious characters to appear on the switch monitor.
RFI is defined as any EMI with a frequency above 10 kHz. This type of interference can travel from the switch
to other devices through the power cable and power source or through the air like transmitted radio waves.
The Federal Communications Commission (FCC) publishes specific regulations to limit the amount of EMI
and RFI that can be emitted by computing equipment. Each switch meets these FCC regulations.
To reduce the possibility of EMI and RFI, follow these guidelines:
•Cover all open expansion slots with a blank filler plate.
•Always use shielded cables with metal connector shells for attaching peripherals to the switch.
When wires are run for any significant distance in an electromagnetic field, interference can occur between
the field and the signals on the wires with the following implications:
•Bad wiring can result in radio interference emanating from the plant wiring.
•Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers
and receivers in the chassis and even create an electrical hazard by conducting power surges through
lines into equipment.
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Preparing the Site
Altitude Requirements

To predict and prevent strong EMI, you might need to consult experts in radio frequency interference
(RFI).
Note
The wiring is unlikely to emit radio interference if you use twisted-pair cable with a good distribution of
grounding conductors. If you exceed the recommended distances, use a high-quality twisted-pair cable with
one ground conductor for each data signal when applicable.
If the wires exceed the recommended distances, or if wires pass between buildings, give special
consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by
lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors
to destroy electronic switches. You might want to consult experts in electrical surge suppression and
shielding if you had similar problems in the past.
Caution
Shock and Vibration Requirements
The switch has been shock- and vibration-tested for operating ranges, handling, and earthquake standards.
Grounding Requirements
The switch is sensitive to variations in voltage supplied by the power sources. Overvoltage, undervoltage,
and transients (or spikes) can erase data from the memory or cause components to fail. To protect against
these types of problems, ensure that there is an earth-ground connection for the switch. You can connect the
grounding pad on the switch either directly to the earth-ground connection or to a fully bonded and grounded
rack.
You must provide the grounding cable to make this connection, but you can connect the grounding wire to
the switch using a grounding lug that ships with the switch. Size the grounding wire to meet local and national
installation requirements. Depending on the power supply and system, a 12 AWG to 6 AWG copper conductor
is required for U.S. installations (for those installations, we recommend that you use commercially available
6 AWG wire). The length of the grounding wire depends on the proximity of the switch to proper grounding
facilities.
You automatically ground the AC power supplies when you connect them to a power source. You must
also connect the chassis to the facility earth ground.
Note
Planning for Power Requirements
To plan for the power requirements of a switch, you must determine each of the following:
•Power requirements for all of the switch components
•Minimum number of power supplies required to power the components installed in the switch
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Shock and Vibration Requirements

•Power mode to use and the number of additional power supplies required for that mode
You must also ensure that the circuit used for the switch is dedicated to the switch to minimize the possibility
of circuit failure.
When you know the amount of power that is required for operations (available power) and redundancy (reserve
power), you can plan for the required number of input power receptacles within reach of the switch location.
Step 1 Determine the power requirement for the switch by summing the maximum wattage for each installed module (see the
following table).
Table 1: Power Requirements for the Switch
TypicalMaximumQuantityComponent
——
1 or 2Supervisor Modules
69 W80 W
–Supervisor A (N9K-SUP-A)
75 W90 W
–Supervisor B (N9K-SUP-B)
——
2System Controller Modules
13 W25 W
–System Controller (N9K-SC-A)
——
1 to 4 (can
mix types)
I/O Modules
300 W430 W
–48-port 1-/10-Gigabit SFP+ plus 4-port 40-Gigabit QSFP+ I/O module
(N9K-X9464PX)
160 W200 W
–48-port 1-/10-GBASE-T plus 4-port 40-Gigabit QSFP+ I/O module
(N9K-X9464TX)
450 W550 W
–48-port 1-/10-GBASE-T plus 4-port QSFP+ I/O module (N9K-X9564TX)
300 W430 W
–48-port 1-/10-Gigabit SFP+ plus 4-port QSFP+ I/O module (N9K-X9564PX)
260 W400 W
–36-port 40-Gigabit QSFP+ aggregation I/O module (N9K-X9636PQ)
360 W420 W
–36-port 40-Gigabit QSFP+ I/O module (N9K-X9536PQ)
240 W300 W
–32-port 40-Gigabit QSFP+ I/O module (N9K-X9432PQ)
100 W125 W3 to 6Fabric Modules (N9K-C9504-FM)
110 W135 W3Fan Trays (N9K-C9504-FAN)
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Planning for Power Requirements

To determine the maximum amount of power that can be consumed by this switch when fully loaded with components,
add the maximum power consumed by two supervisor A modules (2 x 80 W = 160 W), two system controllers (2 x 25
W = 50 W), four 48-port 1- and 10-Gigabit BASE-T I/O modules (4 x 550 W = 2200 W), six fabric modules (6 x 125
W = 750 W), and three fan trays (3 x 135 W = 405 W). The total is 3565 W.
Step 2 Determine the number of power supplies needed for the available power requirement by dividing the power requirement
amount (see Step 1) by the output wattage of the power supplies installed in the switch.
For 3-kW power supplies, round up a fractional result to the nearest ones digit to determine the number of power supplies
needed.
For example, if you are installing a switch with 3-kW power supplies and have a maximum consumption of 3565 W,
you need two power supplies (3565 W / 3000 W = 1.18 [rounded up to 2 power supplies]) to operate the switch and its
modules.
Step 3 Select one of the following power modes to determine the number of additional power supplies required for reserve
power:
•Combined power—Do not add any power supplies to the number of power supplies calculated for the available
power in Step 2. This power mode does not provide power redundancy, so no extra power supplies are needed.
•Power supply redundancy (n+1 redundancy)—Add one power supply (reserve power supply) that can output as
much power as the most powerful power supply used for active power. This form of power redundancy provides
a reserve power supply that can replace any active power supply that goes offline.
•Input source redundancy (grid or n+nredundancy)—Add enough power supplies (reserve power supplies) to at
least equal the total output of the active power supplies (the number of power supplies calculated in Step 2).
Typically, you double the number of power supplies. You must plan for a second power source for the reserve
power supplies. For example, if you calculate that you need two 3-kW power supplies for 6 kW of available power,
you need another two 3-kW power supplies for 6 kW of reserve power (for a total of four 3-kW power supplies
used for available and reserve power).
Step 4 Be sure that the power source circuits are dedicated to the switch and not to other electrical equipment.
For combined power mode (no power redundancy) or power supply (n+1) redundancy, you need only one dedicated
circuit. For input-source (grid or n+n) redundancy, you must have two dedicated power circuits, with each circuit powering
half of the 3-kW power supplies. The requirements for each circuit are listed in the following table.
Requirement for Each
Circuit
Number of CircuitsPower Supply
16 A at 210 to 240 VAC1 (power supply redundancy or no
power redundancy)
2 (input-source redundancy)
3-kW AC power supply (N9K-PAC-3000W-B)
Step 5 Plan the placement of the input power receptacles within reach of the power cables used for each power supply (see the
following table for the maximum distances).
Typically, power receptacles are placed on the rack with the switch.
Maximum Distance Between Receptacle and Power SupplyPower Supply
12 feet (3.5 m)All AC power supplies
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Planning for Power Requirements

Rack and Cabinet Requirements
You can install the following types of racks or cabinets for your switch:
•Standard perforated cabinets
•Solid-walled cabinets with a roof fan tray (bottom to top cooling)
•Standard open four-post Telco racks
To correctly install the switch in a cabinet that is located in a hot-aisle/cold-aisle environment, you should fit
the cabinet with baffles to prevent exhaust air from recirculating into the chassis air intake.
Work with your cabinet vendors to determine which of their cabinets meet the following requirements or see
the Cisco Technical Assistance Center (TAC) for recommendations:
•Use a standard 19-inch (48.3 cm), four-post Electronic Industries Alliance (EIA) cabinet or rack with
mounting rails that conform to English universal hole spacing per section 1 of the ANSI/EIA-310-D-1992
standard.
•The height of the rack or cabinet must accommodate the 7.1-RU (12.4 inches or 31.6 cm) height of the
switch and its bottom support bracket.
•The depth of a four-post rack must be 24 to 32 inches (61.0 to 81.3 cm) between the front and rear
mounting brackets.
•Required clearances between the chassis and the edges of its rack or the interior of its cabinet are as
follows:
◦4.5 inches (11.4 cm) between the front of the chassis and the front of the rack or interior of the
cabinet (required for cabling).
◦3.0 inches (7.6 cm) between the rear of the chassis and the interior of the cabinet (required for
airflow in the cabinet if used).
◦No clearance is required between the chassis and the sides of the rack or cabinet (no side airflow).
Additionally, you must consider the following site requirements for the rack:
•Power receptacles must be located within reach of the power cords used with the switch.
Power cords for 3-kW AC power supplies are 8 to 12 feet (2.5 to 4.3 m) long. For the power cord
specifications, see AC Power Cord Specifications.
•Clearance is required for cables that connect to as many as 192 ports (in addition to the cabling required
for other devices in the same rack). These cables must not block access to any removable chassis modules
or block airflow into or out of the chassis. Route the cables through the cable management frames on
the left and right sides of the chassis.
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Rack and Cabinet Requirements

Statement 1048—Rack Stabilization
Stability hazard. The rack stabilizing mechanism must be in place, or the rack must be bolted to the floor
before you slide the unit out for servicing. Failure to stabilize the rack can cause the rack to tip over.
Warning
Clearance Requirements
You must provide the chassis with adequate clearance between the chassis and any other rack, device, or
structure so that you can properly install the chassis, route cables, provide airflow, and maintain the switch.
For the clearances required for an installation of this chassis, see the following figure.
Figure 1: Clearances Required Around the Chassis
Rear service clearance required to replace fan
trays and fabric modules
9Chassis1
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Clearance Requirements

Clearance area required at the rear of the chassis
within the cabinet (if used) or to the edge of the
hot aisle (if no cabinet) for module handles
10Vertical rack-mount posts and rails2
Chassis depth11Nearest object or inside of cabinet (no side
clearance required)
3
Clearance required between the front of the
chassis and the inside of the cabinet (if used) or
the edge of the cold aisle (if no cabinet) for cable
management and ejector handles on I/O modules
12Air intake from the cold aisle for all modules
and power supplies
4
Front service clearance required for installing
the chassis and replacing the modules on the front
of the chassis
13Air exhaust to the hot aisle for all modules and
power supplies
5
Width of the chassis plus vertical mounting
brackets on each side
14No left side clearance required (no airflow on
left side)
6
Side clearance required by the front of the chassis
for rotation of I/O module handles (keep this area
clear of rack, cable management, and other
components that can prevent full rotation of the
ejector levers)
15Chassis width7
No right side clearance required (no airflow on
right side)
8
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Clearance Requirements