Dell PowerConnect B-RX16 Installation Guide - Page 130

TABLE 20, modules and fan speeds, refer

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5 Managing the cooling system • If the temperature of a management module, the switch fabric module, and all interface modules falls below the low threshold for a fan speed, the fan decreases its speed to the next lower speed. If the temperature of all modules falls below the high threshold for the low speed, the fan operates at the low speed. If the temperature of a management module or the switch fabric module or an interface modules exceeds the high temperature threshold for any of the fan speeds, the system sends a warning message to the system log and an SNMP trap. For information about viewing the warning messages, refer to "Displaying temperature warnings" on page 122. Table 20 outlines the default low and high temperature thresholds for each module and fan speed. TABLE 20 Fan speed Default low and high temperature thresholds for modules and fan speeds Low temperature threshold High temperature threshold Management module (active and standby) High 77 C Medium-high 67C Medium 57 C Low -1 C Management module CPU (on active and standby modules) 85 C 80 C 70C 60 C High Medium-high Medium Low Interface modules 72 C 67 C 57C -1C 85 C 80 C 70C 60 C High Medium-high Medium Low Switch fabric module 56C 51 C 46 C -1C 95 C 60C 55C 50C High Medium-high Medium Low 77C 67C 57 C -1 C 85C 80 C 70 C 60C For information about checking the current settings of the low and high temperature thresholds for modules and fan speeds, refer to "Displaying temperature thresholds for modules and fan speeds" on page 120. If desired, you can change the default low and high temperature thresholds for a particular module and fan speed. For example, to change the low and high thresholds of the medium fan speed for the management modules to 56 C and 72 C, respectively, enter the following command at the global CONFIG level of the CLI: BigIron RX(config)# fan-threshold mp med 56 72 118 BigIron RX Installation Guide 53-1001811-01

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118
BigIron RX Installation Guide
53-1001811-01
Managing the cooling system
5
•
If the temperature of a management module, the switch fabric module, and all interface
modules falls below the low threshold for a fan speed, the fan decreases its speed to the next
lower speed. If the temperature of all modules falls below the high threshold for the low speed,
the fan operates at the low speed.
If the temperature of a management module or the switch fabric module or an interface modules
exceeds the high temperature threshold for any of the fan speeds, the system sends a warning
message to the system log and an SNMP trap. For information about viewing the warning
messages, refer to
“Displaying temperature warnings”
on page 122.
Table 20
outlines the default low and high temperature thresholds for each module and fan speed.
For information about checking the current settings of the low and high temperature thresholds for
modules and fan speeds, refer to
“Displaying temperature thresholds for modules and fan speeds”
on page 120.
If desired, you can change the default low and high temperature thresholds for a particular module
and fan speed. For example, to change the low and high thresholds of the medium fan speed for
the management modules to 56
C and 72
C, respectively, enter the following command at the
global CONFIG level of the CLI:
BigIron RX(config)# fan-threshold mp med 56 72
TABLE 20
Default low and high temperature thresholds for modules and fan speeds
Fan speed
Low temperature threshold
High temperature threshold
Management module (active and standby)
High
77
C
85
C
Medium-high
67
C
80
C
Medium
57
C
70
C
Low
–1
C
60
C
Management module CPU (on active and standby modules)
High
72
C
85
C
Medium-high
67
C
80
C
Medium
57
C
70
C
Low
–1
C
60
C
Interface modules
High
56
C
95
C
Medium-high
51
C
60
C
Medium
46
C
55
C
Low
–1
C
50
C
Switch fabric module
High
77
C
85
C
Medium-high
67
C
80
C
Medium
57
C
70
C
Low
–1
C
60
C