Cisco Nexus 7000 Series - Changing the Amount of Power Reserved for Fabric Modules

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Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-06
Chapter 7 Managing the Switch Hardware
Changing the Amount of Power Reserved for Fabric Modules
2. [ no ] poweroff xbar slot_number
DETAILED STEPS
Changing the Amount of Power Reserved for Fabric Modules
By default, each Cisco Nexus 7000 Series system reserves enough power for the maximum quantity
(five) of fabric modules that can be installed in its chassis. If you have installed fewer than five fabric
modules and need to free up unused reserve power for I/O modules, you can power down the unused
slots and specify a smaller maximum number of fabric modules.
Before you can change the maximum number of fabric modules, you must do all of the following:
• Make sure that the fabric modules that you are using are installed in slots 1 through x where x is the
new maximum number of fabric modules.
You do not have to fill all of those slots with fabric modules, but the fabric modules that you will be
using must be in those slots. For example, if you specify 4 as the new maximum number of fabric
modules, you must make sure that the fabric modules that you are using are in slots 1 through 4.
Also make sure that any empty fabric module slots have blank modules installed in them.
• Make sure that each of the installed fabric modules is powered up by using the power fabric
slot_number command (see the “Powering Fabric Modules Off or On” section on page 7-30).
• Power down the unused slots by using the no power fabric slot_number command (see the
“Powering Fabric Modules Off or On” section on page 7-30).
To specify a different maximum number of fabric modules for your system, use the hardware fabrics
max number command. To verify the status of the installed fabric modules, use the show module xbar
command (see the “Verifying the Status of a Module” section on page 7-19). To verify the amount of
reserved power, use the show environment power command (see the “Displaying Power Usage
Information” section on page 7-9).
SUMMARY STEPS
1. config t
2. hardware fabrics max number
Command Purpose
Step 1
config t
Example:
switch# config t
switch(config)#
Enters configuration mode.
Step 2
poweroff xbar slot_number
Example:
switch(config)# poweroff xbar 1
switch(config)#
Powers off the specified fabric module in the switch.
no poweroff xbar slot_number
Example:
switch(config)# no poweroff xbar 1
switch(config)#
Powers on the specified fabric module in the switch.