Management port (SFP+ port)
6
Two power supplies (one used for operations and
one used for redundancy) (AC power supplies
shown) with power supply slot 1 on the left and
slot 2 on the right.
1
USB port
7
Four fan modules with fan slot 1 on the left and
fan slot 4 on the right
2
Screw holes (6) for attaching rack mounting
brackets
8
Console port (RS232 port)
3
Grounding pad
9
Management port (RJ-45 port)
4
Chassis LEDs (Beacon [BCN] and Status [STS])
5
There is a limit to USB 2.0 devices that use less than 2.5 W (less than 0.5 A inclusive of surge current). There
is no support for devices, such as external hard drives, that instantaneously draw more than 0.5 A.
Note
Depending on whether you plan to position the ports in a hot or cold aisle, you can 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 the following table.
Port-Side Exhaust Airflow Coloring
Port-Side Intake Airflow Coloring
Replaceable Modules
Blue
Burgundy
Fans
Blue
Burgundy
AC power supplies
White
HVAC/HVDC power supplies
Blue
Burgundy
DC power supplies
The fan and power supply modules are field replaceable and you can replace one fan module or one power
supply module during operations so long as the other modules are 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.
Fans and power supply modules must have the same direction of airflow. Otherwise, the switch can overheat
and shut down. If you are installing a dual-direction power supply, that module will automatically use the
same airflow direction as the other modules in the switch.
Note
If the switch has port-side intake airflow (burgundy coloring for fan modules), you must locate the ports in
the cold aisle. If the switch has port-side exhaust airflow (blue coloring for fan modules), you must locate the
ports in the hot aisle. If you locate the air intake in a hot aisle, the switch can overheat and shut down.
Caution
Cisco Nexus 93108TC-FX ACI Mode Hardware Installation Guide
3
Overview
Overview