Cisco Cisco Web Security Appliance S380 Guida Utente

 lists the temperature and hardware conditions that cause a hardware 

trap to be sent:

47C 

0 RPMs 

Status Change Status 

Change

Status 
Change

Status change traps are sent when the status changes. Fan Failure and high 
temperature traps are sent every 5 seconds. The other traps are failure condition 
alarm traps — they are sent once when the state changes (healthy to failure). It is 
a good idea to poll for the hardware status tables and identify possible hardware 
failures before they become critical. Temperatures within 10 per cent of the 
critical value may be a cause for concern.

Note that failure condition alarm traps represent a critical failure of the individual 
component, but may not cause a total system failure. For example, a single fan or 
power supply can fail on a S650 appliance and the appliance will continue to 
operate. 

SNMP provides the ability to send traps, or notifications, to advise an 
administration application (an SNMP management console, typically) when one 
or more conditions have been met. Traps are network packets that contain data 
relating to a component of the system sending the trap. Traps are generated when 
a condition has been met on the SNMP agent (in this case, the IronPort appliance). 
After the condition has been met, the SNMP agent then forms an SNMP packet 
and sends it over port 162, the standard SNMP trap port. In the example below, 
the trap target of 

10.1.1.29

 and the Trap Community string are entered. This is 

the host running the SNMP management console software that will receive the 
SNMP traps from the IronPort appliance.