Recovery Procedure For Downgrading To Fabric 2 Modules From Fabric 3 Modules; Installing Or Replacing A Power Supply In A Switch Chassis - Cisco Nexus 7706 Hardware Installation Manual

Recovery Procedure for Downgrading to Fabric 2 Modules from Fabric 3 Modules

Step 4
If one or more of the fabric modules is indicated as "Fabric Module 2," repeat Step 2 to replace the Fabric 2 module with
the Fabric 3 module and then repeat Step 3 to display the types of fabric modules installed in the fabric slots.
Recovery Procedure for Downgrading to Fabric 2 Modules from Fabric 3
Modules
This section describes the steps needed to downgrade from Fabric 3 modules to Fabric 2 modules if there are
issues with the Fabric 3 upgrade.
Scenario 1
If both Fabric 2 and Fabric 3 modules are up in the switch (FAB2_FAB3 mode), then replace the Fabric 3
modules with the Fabric 2 modules.
Scenario 2
If the switch is loaded with Fabric 3 modules only (FAB3 mode), then migrating to Fabric 2 is disruptive.
The Fabric 2 module will power down when the switch is in FAB3 mode.
Perform the steps given below to replace FAB3 modules with FAB2 modules when the switch is loaded with
only FAB3 modules:
Step 1 Replace one FAB3 module with a FAB2 module. The switch is still in FAB3 mode.
Step 2
The FAB2 module will be in power down state.
Step 3 Repeat Step 1 to replace FAB3 modules with FAB2 modules in all slots until a single FAB3 module is remaining in the
switch.
Step 4 Remove the last FAB3 module. The I/O modules will be powered down due to non-availability of Stage2 bandwidth.
Step 5
Insert a FAB2 module in the slot from which the last FAB3 module was removed. This FAB2 module will power up and
all the I/O modules will also power up in FAB2 mode.
Step 6
After all the I/O modules come online, power up the remaining FAB2 modules by using the no poweroff xbar
moduleNumber command.

Installing or Replacing a Power Supply in a Switch Chassis

You can install up to four power supplies of the following types:
• 3-kW AC power supply (N77-AC-3KW)
• 3-kW DC power supply (N77-DC-3KW)
• 3.5-kW HVAC/HVDC power supply (N77-HV-3.5KW)
If you leave any power supply slots empty, you must install a blank filler plate () in that slot to maintain the
designed airflow.
Cisco Nexus 7706 Hardware Installation Guide
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Installing or Replacing Modules, Fan Trays, and Power Supplies
OL-31330-01