IBM s-series, Инструкция по установке и эксплуатации, Страница: 92 / 170

Table 20. Fan speed, temperature thresholds and fan noise levels on the B08S (continued)
Fan Speed Description
Low Temperature
Threshold High Temperature
Threshold
Fan Operating
Level (% of
Capacity)
Fan Noise
Level
2 Medium-low 48° C 58° C 37 63 dB
1 Low N/A 57° C 25 56 dB
To read additional information about checking the current settings of the low and
high temperature thresholds for modules and fan speeds, see “Displaying
temperature thresholds for thermal planes and fan speeds” on page 67.
Command syntax: If desired, you can change the default low and high
temperature thresholds for a particular thermal plane and fan speed. for example, to
change the low and high thresholds of the medium fan speed for the management
module(s) to 56° C and 72° C, respectively, enter the following command at the
global CONFIG level of the CLI:
FastIron(config)# fan-threshold mp speed-3 56 72
Syntax: fan-threshold <module> [speed-1 <high-threshold>] [speed-2
<low-threshold> <high-threshold>] [speed-3 <low-threshold> <high-threshold>]
[speed-4 <low-threshold> <high-threshold>]
for the <module> parameter, you can specify the following:
v
lp - Changes low and high temperature thresholds for the Interface modules.
v mp - Changes low and high temperature thresholds for the management module.
v
sfp - Changes low and high temperature thresholds for the switch fabric modules.
The fan speeds are as follows:
v speed-1 - low
v speed-2 - medium-low
v speed-3 - medium
v speed-4 - high (shutdown temperature)
For the <low-threshold> and <high-threshold> parameters, you can specify any
temperature in Centigrade. However, when changing low and high temperature
thresholds for a module’s fan speeds, remember that the low temperature threshold
of a higher fan speed must be lower than the high temperature threshold of the
lower fan speed. establishes this guideline to ensure the fan speed stability.
For example, if you are changing the temperature thresholds for the management
module’s high and medium-high fans speeds, the device will accept the following
values because the low temperature threshold for the high speed (67° C) is lower
than the high temperature threshold (72° C) for the medium-high speed.
Table 21. Acceptable settings for low temperature thresholds and fan speed
Fan Speed Low Temperature Threshold High Temperature Threshold
High 67° C 82° C
Medium-high 57° C 72° C
66
Ethernet Switch s-series Installation and User Guide