SNMP Configuration and Management Manual

SNMP Configuration and Management Manual—424777-006
C-1
C
Unsolicited SNMP Agent Messages
The SNMP agent generates traps and EMS event messages when noteworthy
conditions, such as a change in the state of an object, occur. This appendix describes
these traps and events.
Traps
Table C-1 describes traps the SNMP agent generates. The traps are a subset of the
standard SNMP traps prescribed in RFC 1157.
The SNMP agent forwards traps to SNMP managers configured to receive them. If
started using the WARM startup parameter and no trap destination definitions exist, the
SNMP agent creates a trap destination definition for the Internet address associated
with any manager from which a request is received through TCP/IP. For more
information, see Configuring Trap Destinations
on page 2-38.
Table C-1. Traps Generated by SNMP Agent
Generic Trap Type Reason for Generating Trap
authenticationFailure The SNMP agent received a request that could not be authenticated
for one or more of these reasons:
•
The request is associated with a community not configured into
the authentication table.
•
The request originates from an address not defined for a
configured community.
•
The request is a SetRequest PDU from a community configured
for READONLY access.
Refer to Configuring Security
on page 2-26 for more information on
the authentication scheme used by the SNMP agent.
coldStart The SNMP agent is being initialized. A coldStart trap is generated
when:
•
The SNMP agent is started for the first time. The message goes
to all configured trap destinations.
•
The backup process takes over. The message goes to all
configured trap destinations.
•
A new trap destination is defined and started. The message
goes to the new trap destination.