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Replacing a Fan Module During Operations
Step 9
Slide the module all the way into the chassis until its front side comes in contact with the chassis. For the last 0.2 inches
(0.5 cm),carefully mount the module onto the chassis connectors by pushing more firmly, but do not force the module
if it does not move further (excessive force can damage the connectors).
If you are not able to push the module all the way into the slot, carefully slide the module out of the slot and
Note
check its electrical connectors for damage. If damaged, contact Cisco Technical Assistance for help. If
undamaged, repeat Step 6 to reinstall the module.
Step 10
Screw in both captive screws on the front of the module to secure the module to the chassis. Tighten each screw to 8
in-lb (0.9 N·m).
Step 11
Verify that the Status (STS) LED turns on and becomes amber.
Step 12
Reconnect each of the uplink cables and verify that the LED for each port becomes green.
Under each set of two uplink ports, there is an Active (ACT) LED that indicates whether the ports are active for this
switch. Connect cables to only the active ports.
Replacing a Fan Module During Operations
There must always be at least one fan module installed in the chassis to maintain the designed airflow. You
can remove one fan module temporarily to replace it with another fan module within two minutes to avoid a
shutdown, but if the replacement fan module is not available, leave the original fan module in the chassis.
All fan and power supply modules must have the same airflow direction or else an error can occur with the
switch overheating and shutting down. You can determine the airflow direction of a fan module by the color
of the stripe on the front of the module. If the fan module has a blue stripe for port-side exhaust airflow, the
power supplies must have blue or gray coloring for the same airflow direction. If the fan module has a burgundy
stripe for port-side intake airflow, the power supplies must have burgundy or green coloring for the same
airflow direction. If a power supply has white coloring, it can be used with fan modules using either port-side
intake or port-side exhaust airflow. To avoid over heating the switch, make sure that the fan modules are
positioned in one of the following ways:
• For port-side exhaust airflow with blue coloring, position the fan modules in a cold aisle.
• For port-side intake airflow with burgundy coloring, position the ports in a cold aisle.
Before you begin
Before you can replace a fan module, ensure that both of the following conditions exist:
• There are two functioning fan modules in the other fan slots. In order to replace a fan module during
• The replacement fan module must have the same airflow direction as the other modules in the chassis.
If you must replace the fan module during operations and both of the above conditions are not met, leave the
fan module that you need to replace in the chassis to preserve the designed airflow until you have the required
module.
Cisco Nexus 9396TX NX-OS Mode Switch Hardware Installation Guide
34
operations, there must be two fan modules circulating air in the chassis at all times. The other fan module
is redundant and can be replaced.
Replacing Modules
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