Fabric slots FM 2, FM 4, or FM 6 must be filled with functioning fabric modules or blank modules with power
connectors (N9K-C9516-FM-Z) in order to provide power to the fan trays covering those modules.
If fabric slots FM 1, FM 3, or FM 5 are not filled with a fabric module, you must make sure that they have a
blank module (N9K-C9516-FM-CV) installed to preserve the designed airflow.
Note
You can replace a fabric module while other fabric modules are operating by removing the fan tray in front
of the fabric module. Remove the fabric module, then install the new fabric module, and replace the fan tray
over the installed fabric module.
To maintain the designed airflow while you remove the fan tray, the fans in the other fan trays increase their
speed. During operations, we recommend that you remove only one fan tray at a time and reinstall that fan
tray within three minutes. This action avoids the possibility of having the switch overheat and shut down.
If you remove more than one fan tray at a time, the switch shuts down if you do not reinstall the extra missing
fan trays within two minutes. The shutdown can occur earlier if the switch over heats.
Caution
Removing a Fabric Module
Before you begin
• Wear an electrostatic discharge (ESD) wrist strap or other ESD protective device while handling modules.
• Prepare an antistatic surface or packing materials for each module that you remove from the chassis.
• Remove the fan tray that covers the fabric module that you are removing.
Step 1
If you are replacing a fabric module, open the packaging for the new module and inspect it for damage.
If the module is damaged, alert the Technical Assistance Center (TAC) and stop this replacement process until you have
an undamaged module to install.
Step 2
Remove the fan tray that covers the fabric module by following these steps:
a) Unscrew the four captive screws on the front of the fan tray until each screw is free of the chassis. See Callout 1 in
the following figure.
Cisco Nexus 9516 NX-OS Mode Switch Hardware Installation Guide
74
Replacing or Installing Modules, Fan Trays, and Power Supplies
Removing a Fabric Module