Article ID: 13323 
Products
SecureStack C3, C2, B3, B2, A2
NetSight Console 
Discussion
Determining the failing unit from a fan failure 
syslog message is explained in 
5743. 
Fan failure 
traps are not specifically controllable but may be generated from the fanFail section of the cabletron-traps MIB, when traps are enabled and a fan has failed. 
In NetSight Console, the trap summary line looks something like: Notice  SNMP v2  09/09/2010 01:28:27 PM  10.20.109.50  ---  SNMP Trap  Trap  fanFail  Fan Failure.Double-clicking on a summary line to pull up event details looks something like: Timestamp:   09/09/2010 01:28:27 PM      Acknowledged: No
 Type:        Trap                        Source:       10.20.109.50
 Event Name:  fanFail                     Client:       ---
 Severity:    Notice                      User:         SNMP Trap
 Category:    SNMP v2
 
 Information: Fan Failure.
 
 Enterprise:  Cabletron                   Trap Number:  .1.3.6.1.4.1.52.0.286
 
 Description: This trap is generated when the device detects that
              the system fans have failed.Such traps are not formulated to provide detailed information of the failing unit within a stacked topology, however do serve the purpose of alerting the network administrator to look in the syslog for more detailed diagnostic information. 
If a current syslog repository is not available in NetSight or some other network management application, a current.log (
5487) file would provide fan failure information for a standalone or a stack, with any firmware version. A simpler approach that would work for this purpose is to issue a 'show support' command while running "higher firmware". The items listed at the end of that output - as read from the manager unit - may be interpreted as explained in 
5743.