Brocade FastIron SX Series Chassis Hardware Installation Guide - Manual (Page 102)

For the low-threshold and high-threshold variables, 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. Brocade 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 Brocade 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.
Fan Speed Low Temperature Threshold High Temperature Threshold
High 67 ° C 82 ° C
Medium-high 57 ° C 72 ° C
However, the Brocade device will not accept the following values because the low temperature
threshold for the high speed (73 ° C) is higher than the high temperature threshold (72 ° C) for the
medium-high speed.
Fan Speed Low Temperature Threshold High Temperature Threshold
High 73 ° C 82 ° C
Medium-high 57 ° C 72 ° C
The high-threshold temperature for the high fan speed (speed-4) is the shutdown temperature. If a
thermal plane’s fan-controlled temperature reaches and stays at the shutdown temperature for five
minutes, the Brocade device will automatically shut down to prevent damage.
Displaying temperature thresholds for thermal planes and fan speeds
To check the current settings of the low and high temperature thresholds for thermal planes and fan
speeds, enter the show chassis command at any level of the CLI.
The following shows an example of the show chassis command output on the FSX 800. The display
is similar on the FSX 1600. This display shows the currently configured temperature thresholds for the
management module or modules (Rule 1/3), all of the interface modules (Rule 2/3), and the switch
fabric modules (Rule 3/3).
device# show chassis
...
Fan speed switching temperature thresholds:
Rule 1/3 (MGMT CARDS THERMAL PLANE):
Speed 1: NM<----->57 deg-C
Speed 2: 48<----->58 deg-C
Speed 3: 49<----->59 deg-C
Speed 4: 50<----->80 deg-C (shutdown)
Rule 2/3 (LINE CARDS THERMAL PLANE):
Speed 1: NM<----->57 deg-C
Speed 2: 48<----->58 deg-C
Speed 3: 49<----->59 deg-C
Speed 4: 50<----->80 deg-C (shutdown)
Rule 3/3 (SWITCH FABRIC CARDS THERMAL PLANE)***active***:
Speed 1: NM<----->57 deg-C
Speed 2: 48<----->58 deg-C
Speed 3: 49<----->59 deg-C
Managing the Chassis and Modules
100 Brocade FastIron SX Series Chassis Hardware Installation Guide
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