Overview

Introduction

The Cisco Nexus 9336C-FX2 switch is a 1-RU, fixed-port switch designed for spine-leaf-APIC deployment in data centers. This switch features 36 40/100-Gigabit QSFP28 ports. Ports 31-36 are designated as fabric links, while downlink ports 1-30 support 4x10/4x25-Gigabit breakout. The number of supported breakout ports has increased over ACI releases, with up to 34 supported in ACI releases 4.2(4) and 5.0(1), compared to 20 in earlier versions. Ports 31-34 can also function as downlink ports from ACI release 3.2(3i) onwards. All ports are compatible with 10-Gigabit connections using a QSA adapter (CVR-QSF-SFP10G), and ports 7-32 support 1-Gigabit with a QSA adapter. For a comprehensive list of supported transceivers, adapters, and cables, refer to the Cisco Transceiver Modules Compatibility Information document.

Note: When connecting an APIC to a 40-Gigabit interface, ensure the use of an adapter that automatically converts the interface to 10-Gigabit. 40-Gigabit to 10-Gigabit breakout cables are not supported in this manner and require manual configuration after fabric discovery.

User-Replaceable Components

This switch includes the following user-replaceable components:

Fan Modules

Three fan modules are available with different airflow choices:

Port-side exhaust airflow with blue coloring (NXA-FAN-65CFM-PE)
Port-side exhaust airflow with blue coloring (NXA-SFAN-65CFM-PE)
Port-side intake airflow with burgundy coloring (NXA-FAN-65CFM-PI)
Port-side intake airflow with burgundy coloring (NXA-SFAN-65CFM-PI)

Note: The NXA-SFAN-65CFM fans are supported starting with Cisco NX-OS Release 9.3(7). To enable or disable the display of the fan's serial number, use the [no] hardware fan-sprom command.

Fan Speeds

	Port-Side Intake Fan Speed %	Port-Side Exhaust Fan Speed %
Typical/Minimum	50%	70%
Maximum	100%	100%

Note: Each fan module has two rotors. The switch can function normally if one rotor fails. If more than one rotor fails, the switch will issue a warning and power down in 2 minutes.

Power Supply Modules

Two power supply modules are included (one for operation and one for redundancy [1+1]) with the following choices:

750-W AC power supply with port-side exhaust airflow (blue coloring) (NXA-PAC-750W-PE)
750-W AC power supply with port-side intake airflow (burgundy coloring) (NXA-PAC-750W-PI)
1100-W AC power supply with port-side exhaust airflow (blue coloring) (NXA-PAC-1100W-PE2)
1100-W AC power supply with port-side intake airflow (burgundy coloring) (NXA-PAC-1100W-PI2)
1100-W HVAC/HVDC power supply with port-side exhaust airflow (blue coloring) (NXA-PHV-1100W-PE)
1100-W HVAC/HVDC power supply with port-side intake airflow (burgundy coloring) (NXA-PHV-1100W-PI)
1100-W DC power supply with port-side exhaust airflow (blue coloring) (NXA-PDC-1100W-PE)
1100-W DC power supply with port-side intake airflow (burgundy coloring) (NXA-PDC-1100W-PI)

Note: The 750-W AC PSU is compatible only with software versions ACI-N9KDK9-14.2 or NXOS-9.3.3 and onwards.

Note: Both power supplies use the same type of power source. Do not mix AC and DC power sources.

Note: All fan modules and power supplies must use the same airflow direction during operations.

Note: In the event that only one power supply is operating in an active system and a second power supply is inserted, the system fan will slow down to 50% of Max speed for 12 seconds. It can take up to 10 seconds for the second power supply to become active. Do not remove the first power supply during this time-frame to avoid system shutdown.

Hardware Features

Port Side View

The following figure shows the hardware features seen from the port side of the chassis:

Figure 1: Port Side View of the Cisco Nexus 9336C-FX2 Switch

Diagram Description: A top-down view of the front panel of the Cisco Nexus 9336C-FX2 switch. The ports are arranged in a grid. Key components are labeled with numbers:

1: Chassis LEDs (Beacon [BCN], Status [STS], and Environment 4 [ENV])
2: Lane selector LEDs
3: Lane selection button
4: 36 ports that are configurable differently for APIC and spine switch connections.
5: Screw holes (6) for attaching rack mounting brackets.
6: Screw holes (2) for attaching grounding lug.

Power Supply Side View

The following figure shows the hardware features seen from the power supply side of the chassis:

Figure 2: Power Supply Side View of the Cisco Nexus 9336C-FX2 Switch

Diagram Description: A view of the rear panel of the Cisco Nexus 9336C-FX2 switch, showing the power supply and fan modules. Key components are labeled with numbers:

1: Out-of-band management port (RJ-45 port)
2: Console port (RS232 port)
3: Out-of-band management port (SFP port)
4: USB port for saving or copying functions.
5: Two power supplies (one for operations and one for redundancy). AC power supplies are shown, with power supply slot 1 on the left and slot 2 on the right.
6: Three fan modules with fan slot 1 on the left and fan slot 3 on the right.
7: Chassis LEDs (Beacon [BCN] and Status [STS])
8: Screw holes (6) for attaching rack mounting brackets.
9: Screw holes (2) for attaching grounding lug.

Note: USB support is limited to USB 2.0 devices that use less than 2.5 W (less than 0.5 A inclusive of surge current). Devices that instantaneously draw more than 0.5 A, such as external hard drives, are not supported.

Depending on the aisle positioning (hot or cold), fan and power supply modules with port-side intake (burgundy coloring) or port-side exhaust (blue coloring) airflow can be ordered. All power supply and fan modules must have the same coloring.

The fan and power supply modules are field replaceable. A fan module or power supply module can be replaced during operations, provided the other modules are functioning. If only one power supply is operational, install the replacement power supply in the open slot before removing the original one.

Note: All fan and power supply modules must have the same direction of airflow. Otherwise, the switch can overheat and shut down.

Important Considerations

Caution: If the switch has port-side intake airflow (burgundy coloring for fan modules), it must be located in the cold aisle. If the switch has port-side exhaust airflow (blue coloring for fan modules), it must be located in the hot aisle. Locating the air intake in a hot aisle can cause the switch to overheat and shut down.

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