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

Information About Fan Trays

S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
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:
•
•
When replacing a failed fan tray in a running system, be sure to promptly replace the fan tray.
Note
Tip
I f o n e o r m o r e f a n s f a i l w i t h i n a f a n t r a y , t h e F a n S t a t u s L E D t u r n s r e d . A f a n f a i l u r e c o u l d l e a d t o
t e m p e r a t u r e a l a r m s i f n o t c o r r e c t e d i m m e d i a t e l y .
The fan status is continuously monitored by the software. In case of a fan failure, the following actions
occur:
•
•
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
7-32
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.
The fan tray is removed for replacement—The fan tray is designed to be removed and replaced while
the system is operating without presenting an electrical hazard or damage to the system. Depending
on the type of fan tray that you remove, one of the following will occur:
– Cisco Nexus 7009 Series fan tray—The switch can function without a fan tray for up to three
minutes by which time you must replace the missing fan tray.
Cisco Nexus 7010 Series system fan tray—The fans in the remaining system fan tray increase
–
their speeds as needed for the current temperature until you replace the missing fan tray.
Cisco Nexus 7010 Series fabric fan tray—The fan in the remaining fabric fan tray increases its
–
speed to the maximum speed until you replace the missing fabric fan tray.
Cisco Nexus 7018 Series fan tray—If you do not replace the fan tray within three minutes, the
–
system shuts down the modules cooled by the removed fan tray. For the top fan tray, that means
that the system would shut down the supervisor in slot 9, the I/O modules in slots 1 through 8,
and the fabric modules. For the bottom fan tray, that means that the system would shut down the
supervisor in slot 10 and the I/O modules in slots 11 through 18.
System messages are displayed.
Call Home alerts are sent (if configured).
Chapter 7
Purpose
Enters configuration mode.
Powers off the specified fabric module in the switch. For
the number, use a digit between 1 and 5, inclusive.
Managing the Switch Hardware
OL-23069-06