The Cisco Nexus 93180LC-EX switch (N9K-C93180LC-EX) is a 1-RU, fixed-port ACI leaf switch with 24 40/50/100-Gigabit Ethernet QSFP+ downlink (server-facing) ports and 6 40/100-Gigabit Ethernet QSFP+/QSFP28 uplink (leaf-switch facing) ports. You can use or configure these ports like this:

• Downlink ports (ports 1 to 24) are individually configured like this:

  Odd-Numbered Port (1 to 23)	Even-Numbered Port (2 to 24) below the Odd-Numbered Port
  40-Gigabit QSFP+ downlink port (default)	40-Gigabit QSFP+ downlink port (default)
  40-Gigabit downlink port with 4x10-Gigabit breakout feature	Hardware disabled
  100-Gigabit QSFP28 downlink port	Hardware disabled
  100-Gigabit downlink port with 4x25-Gigabit breakout feature	Hardware disabled
  1/10-Gigabit port using a QSFP-to-SFP/SFP+ adapter in the port	1/10-Gigabit port using a QSFP-to-SFP/SFP+ adapter in the port Note   Even-numbered port must use the same speed as the odd-numbered port in the same vertical pair of ports. Connect the odd-numbered port first to set the speed for the vertical pair of ports.
  Profiled as 40/100-Gigabit QSFP+ uplink port	Hardware disabled

  Note

  The breakout feature is available only for release 3.1(1) or later. The top and bottom ports must run at the same speed. If a speed difference occurs, the bottom port disables. The breakout feature is available only for downlink ports 1 to 23, unless those ports are profiled as uplink ports. Autonegotiation is supported on 40G/100G copper DAC cables.

• Uplink ports (25, 27, and 29 to 32) are individually used like this:

  • 40/100-Gigabit QSFP+/QSFP28 uplink port (default)

• Hardware disabled ports (ports 26 and 28)

Note	This switch is not supported in the ACI-mode switch release 6.1(1) and later.

Note	The 40/50-Gigabit ports are 50-Gigabit capable, but that speed is not currently supported.

• Fan modules (four) with these airflow choices:

  • Port-side intake airflow with burgundy coloring (NXA-FAN-30CFM-B)

  • Port-side exhaust airflow with blue coloring (NXA-FAN-30CFM-F)

    Table 1. Fan Speeds for this Switch

    	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 inside any one fan module fails. If more than one rotor fails, the switch issues a warning and powers down in 2 minutes.

• Do not mix AC and DC power sources and do not mix airflow directions. Power supply modules (two—one for operations and one for redundancy [1+1]) with these choices:

  • 500-W AC power supply with port-side intake airflow (burgundy coloring) (NXA-PAC-500W-PI)

  • 500-W AC power supply with port-side exhaust airflow (blue coloring) (NXA-PAC-500W-PE)

  • 930-W DC power supply with port-side exhaust airflow (blue coloring) (NXA-PDC-930W-PE)

  • 930-W DC power supply with port-side intake airflow (burgundy coloring) (NXA-PDC-930W-PI)

  • 1200-W HVAC/HVDC power supply with dual-direction airflow (white coloring) (N9K-PUV-1200W)

  Note	If you use the 1200-W HVAC/HVDC power supply, the power supply automatically uses the same airflow direction as used by the fan modules installed in the same switch.

This figure shows the hardware features seen from the port side of the chassis.

To determine which transceivers, adapters, and cables this switch supports, see the Cisco Transceiver Modules Compatibility Information document.

This figure shows the hardware features seen from the power supply side of the chassis.

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, such as external hard drives, that instantaneously draw more than 0.5 A are not supported.

Depending on whether you plan to position the ports in a hot or cold aisle, order the fan and power supply modules with port-side intake or port-side exhaust airflow. To determine the airflow direction of the modules installed in your switch, see this table.

The fan and power supply modules are field replaceable. Replace one fan module or one power supply module during operations, as long as the other modules are installed and operating. If you have only one power supply that is installed, you can install the replacement power supply in the open slot before removing the original power supply.

Note	All the fan and power supply modules must have the same direction of airflow, or the switch can overheat and shut down. If you are installing a dual-direction power supply, that module automatically uses the same airflow direction as the other modules in the switch.

Caution

If the switch has port-side intake airflow (burgundy coloring for fan modules), locate the ports in the cold aisle. If the switch has port-side exhaust airflow (blue coloring for fan modules), locate the ports in the hot aisle. If you locate the air intake in a hot aisle, the switch can overheat and shut down.

The switch supports the Fabric Extenders (FEXs) listed at https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/hw/interoperability/fexmatrix/fextables.html.