Information About Fan Trays - Cisco Nexus 7000 Hardware Installation And Reference Manual

Appendix 8 Managing the Switch Hardware
•
•
•
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
reserved power, use the show environment power command (see the
Information" section on page
Power allocations differ for fabric modules depending on the type of fabric module (for example,
Note
fabric-1 versus fabric-2) and for the switch model (for example, Cisco Nexus 7004 versus Cisco Nexus
7018).
SUMMARY STEPS
1.
2.
DETAILED STEPS
Command
Step 1
config t
Example:
switch# config t
switch(config)#
Step 2
hardware fabrics max number
Example:
switch(config)# hardware fabrics max 4
switch(config)#

Information About Fan Trays

Hot-swappable fan trays are provided in all switches in the Cisco Nexus 7000 Series to manage airflow
and cooling for the entire switch. Each fan tray contains multiple fans to provide redundancy. The switch
can continue functioning in the following situations:
•
OL-23069-06
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 no poweroff xbar
slot_number command (see the
Power down the unused slots by using the poweroff xbar slot_number command (see the
Down a Fabric Module" section on page
"Verifying the Status of a Module" section on page
8-9).
config t
hardware fabrics max number
One or more fans fail within a fan tray—Even with multiple fan failures, the Cisco Nexus 7000
Series switch can continue functioning. When a fan fails within a tray, the functioning fans in the
module increase their speed to compensate for the failed fans.
"Shutting Down a Fabric Module" section on page
8-22).
Purpose
Starts the global configuration mode.
Powers off the specified fabric module in the switch. For
the number, use a digit between 1 and 5, inclusive.
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
Information About Fan Trays
8-22).
"Shutting
8-18). To verify the amount of
"Displaying Power Usage
8-31