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.
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
Change the Amount of Power Reserved for Fabric Modules,
on page 82
).
Note
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
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
OL-30453-01
83
Managing the Switch
Shutting Down or Powering Up a Fabric Module