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Managing the Switch
Shutting Down or Powering Up a Fabric Module
To shut down a fabric module, use either the out-of-service xbar command or the poweroff xbar command.
If you use the poweroff xbar command, the slot remains in that state until you use the no poweroff command.
If you use the out-of-service xbar command, the out-of-service state remains in effect until you do something
like remove the module and replace it with another module.
Note
If you are going to limit the maximum number of fabric modules, make sure that powered-on fabric
modules are in the first n fabric module slots, where n is the new maximum number of fabric modules.
For example, if you are limiting the maximum number of fabric modules to 4, you must make sure that
the four powered-on fabric modules are in fabric slots 1 through 4.
If you are powering up more fabric modules than allowed by the current maximum number of fabric
modules, then make sure that the fabric modules that you are powering up are installed in the first n fabric
slots (slots 1 through n), power-on those modules with the no poweroff xbar command, and change the
maximum number of fabric modules to n (see
on page
Procedure
Step 1
Start the configuration mode by entering the configure terminal command.
Example:
switch# configure terminal
switch(config)#
Step 2
Shut down or power up the specified fabric module by entering the [no] shutdown xbar slot_number command.
Example:
switch(config)# poweroff xbar 1
switch(config)#
Example:
switch(config)# no poweroff xbar 1
switch(config)#
Power Modes Overview
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 when there is a power
loss:
Combined mode
OL-30453-01
82).
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.
Cisco Nexus 7718 Switch Site Preparation and Hardware Installation Guide
Shutting Down or Powering Up a Fabric Module
Change the Amount of Power Reserved for Fabric Modules,
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