Brocade Communications Systems Brocade MLX Series and Brocade Netlron XMR 53-1002373-02 - Manual (Page 350)

332 Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide
53-1002373-02
Managing the cooling system
7
• If the temperature of a management module, switch fabric module, or one interface module
exceeds the high threshold specified for a fan speed, the fan changes to the next higher speed.
If the temperature of any of the modules exceeds the high threshold for the high speed, the
router shuts down the modules to prevent damage. The router also 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 337.
• The frequency with which the temperature is checked is determined by the setting of the
temp-poll-period command. For information about temp-poll-period command, refer to
“Changing the temperature polling interval” on page 336.
• If the temperature of a management module, switch fabric module, and interface modules
falls below the low threshold for a fan speed, the fan changes 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.
Table 48 describes the default temperature thresholds for Brocade MLXe devices.
TABLE 48 Default temperature thresholds for modules and fan speeds for Brocade MLXe devices
Fan speed Low temperature threshold High temperature threshold
Management modules
High 77  C 85 C
Medium-high 67 C 80 C
Medium 57 C 70 C
Low –1  60 C
Interface modules
High 56  C 95 C
Medium-high 51 C 60 C
Medium 46  C 55  C
Low –1  50 C
Switch fabric module
High 72  C 85  C
Medium-high 67  C 80 C
Medium 57 C 70 C
Low –1  60  C