Technical data

ServerIron ADX Administration Guide 45
53-1002434-01
Configuring the cooling system
1
1. The power required to operate the Management module (or modules if a standby Management
module is installed) and the fans (at 100% RPM) is deducted from the available power budget.
NOTE
The power budget is calculated based on the number of power supplies that are operating in
the system and the power consumption of the system component is calculated using the
values described in Table 1.
2. The Interface Modules are powered-up starting with Slot 1 and continuing sequentially through
all installed Interface modules. If the power budget is exceeded during this procedure a
SYSLOG error message is generated.
3. The Switch Fabric Modules are powered-up in sequence starting with SF1. If the power budget
is exceeded during this procedure a SYSLOG error message is generated.
4. The Application Switch Modules (ASM) are powered-up starting with Slot 1 and continuing
sequentially through all installed ASM modules. If the power budget is exceeded during this
procedure a SYSLOG error message is generated.
Configuring the cooling system
The ServerIron ADX switch has automatic fan speed control. The fans operate at the following
speeds:
• low – 50% of the maximum RPM
• med – 75% of the maximum RPM
• med_hi – 90% of the maximum RPM
• hi – 100% of the maximum RPM
If any module exceeds a temperature threshold the fan speed is bumped-up to the next level. If all
temperatures monitored in the chassis drop below a threshold, the fan speed is bumped down to
the previous level.
Table 2 provides the default low and high temperature thresholds for each module and the
associated fan speed.
TABLE 2 Default low and high temperature thresholds for modules and fan speeds
Fan Speed Low Temperature Threshold High Temperature Threshold
Active Management module
High 77 C85 C
Medium-high 67 C80 C
Medium 0 C70 C
Low –1 60 C
Standby Management moduls
High 77 C95 C
Medium-high 67 C80 C
Medium 0 C70 C
Low –1 60 C