The following table lists which fabric module slots are behind each fan tray. The fan tray has an LED that
displays the status for the two fabric modules behind it. To replace a fabric module, you must first remove
the fan tray that covers it.
Fabric slots FM 2, FM 4, or FM 6 must be filled with functioning fabric modules 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-C9508-FM-CV) installed to preserve the designed airflow.
Note
Fabric Module SlotsFan Tray Slot
FM 1 (slot 21 in reports)FAN 1
FM 2 (slot 22 in reports)
FM 3 (slot 23 in reports)FAN 2
FM 4 (slot 24 in reports)
FM 5 (slot 25 in reports)FAN 3
FM 6 (slot 26 in reports)
Overview of Power Modes
You can configure one of the following power modes to either use the combined power provided by the
installed power supply units (no power redundancy) or to provide power redundancy for when there is a power
loss:
Combined mode
This mode allocates the combined power of all power supplies to active power for switch operations.
This mode does not allocate reserve power for power redundancy in case of power outages or power
supply failures.
n+1 redundancy mode
This mode allocates one power supply as a reserve power supply in case an available power supply
fails. The remaining power supplies are allocated for available power. The reserve power supply must
be at least as powerful as each power supply used for the available power.
For example, if a switch requires 2.0 kW of available power and the switch has two power supplies
that each output 3 kW, then one of the power supplies provides 3.0 kW of available power and one
power supply provides 3.0 kW of reserve power in case the other power supply fails.
Cisco Nexus 9508 NX-OS Mode Switch Hardware Installation Guide
68
Managing the Switch
Overview of Power Modes
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