Brocade Communications Systems MLX Series Hardware Installation Manual page 252

6
Managing the cooling system
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TABLE 37
Fan speed
Management modules
High
Medium-high
Medium
Low
Management modules CPU
High
Medium-high
Medium
Low
Interface modules*
High
Medium-high
Medium
Low
Interface modules Packet Processor*
High
Medium-high
Medium
Low
236
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"
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"
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 37 describes default low and high temperature thresholds for each module and fan
speed for Brocade MLX and NetIron XMR routers.
Default temperature thresholds for modules and fan speeds for Brocade MLX and NetIron XMR
devices
on page 243.
on page 241.
Low temperature threshold
77° C
67° C
57° C
–1°
75° C
65° C
55° C
–1°
85° C (56° C)
75° C (51° C)
67° C (46° C)
–1°
95° C (70° C)
85° C (60° C)
50° C (45° C)
–1°
Brocade MLX Series and NetIron XMR Hardware Installation Guide
High temperature threshold
85° C
80° C
70° C
60° C
95° C
80° C
70° C
60° C
100° C (95° C)
90° C (60° C)
80° C (55° C)
70° C (50° C)
113° C (113° C)
100° C (75° C)
90° C (65° C)
80° C (50° C)
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