Fan detection and error checking policies
During system startup and operation, the
Brocade ICX 7250, checks the fan status and automatically performs corrective actions and generates
syslog messages if a problem is detected (refer to the following table).
Added this topic to 08.0.40 release, per a request from Huzefa Burmawala. Added from
'SICA_THERMAL_POLICY_R2 3.pdf' aka 'BROCADE SICA-24/24P/24G/48/48P Thermal Policy'..
If the Brocade ICX 7250 determines that there is a problem with the fans, it performs the following actions and generates the following syslog messages, as shown in the following table.
Note: To determine the fan direction (either front to back, or back to front), enter the
show chassis command.
Brocade ICX 7250 fan error detection and resolution
| Issue detected | Attempted resolution |
|---|---|
| During system bootup, no fan is detected | The system immediately shuts down. |
| During system bootup, fewer fans than required for normal operation are detected | The system boots up normally and follows the fan speed and shutdown policy as described in Temperature threshold levels. A syslog message is generated that describes the issue. |
| System boots up normally, but all fans fail during system operation | The system immediately shuts down. A syslog message describing the issue is generated prior to shutdown. |
| After system bootup, fewer fans than required for normal operation are detected | No action is performed. The system follows the fan speed and shutdown policy as described in Temperature threshold levels. A syslog message is generated that describes the issue. |
| After system bootup, two of the power supply fans are detected as operating in opposite directions | No action is performed. The system follows the fan speed and shutdown policy as described in Temperature threshold levels. A syslog message is generated that describes the issue. |
| After system bootup, two of the module fans are detected as operating in opposite directions | No action is performed. The system follows the fan speed and shutdown policy as described in Temperature threshold levels. A syslog message is generated that describes the issue. |
| After system bootup, the power supply and module fans are detected as operating in opposite directions | No action is performed. The system follows the fan speed and shutdown policy as described in Temperature threshold levels. A syslog message is generated that describes the issue. |
| During normal system operation, one of the module fans reports that it is operating in the incorrect direction | No action is performed. The system follows the fan speed and shutdown policy as described in Temperature threshold levels. A syslog message is generated that describes the issue. |
| During normal system operation, the system detects that a power supply or module fan has been replaced, and the new fan is operating in the incorrect direction | No action is performed. The system follows the fan speed and shutdown policy as described in Temperature threshold levels. A syslog message is generated that describes the issue. |
| System detects that the critical (shutdown) temperature has been exceeded | The system generates a syslog message when the issue is detected, and every 30 seconds after detection. If the critical (shutdown) temperature is exceeded for two minutes, the system shuts down. |