3Com 4007, Руководство по внедрению, Страница: 124 / 684

124 C
HAPTER
5: M
ANAGING THE
C
HASSIS
P
OWER AND
T
EMPERATURE
Overheat Power-off Process
The module overheat power-off process is as follows:
1
When any chassis temperature sensor detects an internal chassis
operating temperature of 45 °C (113 °F) or higher, power management
issues warning traps that inform the user that an overheat condition may
soon exist. The system generates warning traps every 30 seconds
(approximately) at this point.
2 When internal chassis operating temperature reaches 60 °C
(140 °F), power management power-disables
selected modules installed
within the affected overheat management area to reduce the 5-volt
power consumption by at least 50 watts.
Selected modules in the overheat management area power off, in order,
starting with modules that have the lowest power class setting.
This reduction of power consumption should provide a 2 °C drop in
temperature per slot at the temperature sensor for the overheat
management area. The system generates overheat traps every 10 seconds
(approximately).
3 If two or more modules in the affected overheat management area have
the
same
power class, they power off from highest slot number to lowest
slot number.
4 Switch fabric modules and interface modules continue to power off until
all modules in the affected overheat management area have powered off
or until you resolve the overheating condition. Modules with a power
class setting of 10 continue to run.
5 Chassis temperature is allowed to stabilize for 15 minutes before further
action is taken.
6 If chassis temperature is not at or below the established overheat
threshold after 15 minutes have elapsed,
all
modules are powered off.
Modules do not power on again until you correct the overheat condition.