
ATX MIB Reference Guide
11-1
CHAPTER 11
TRAPS
The unit sends Trap PDUs to the NMS, using the pre-configured NMS IP address
(see configNMSAddress). If no address has been pre-configured, then the unit
sends the Traps to the source IP address of the last SNMP datagram received
from an NMS. If no address has been pre-configured, and if no datagrams have
been received since the unit was booted, then the unit uses the broadcast IP
address.
The Trap PDUs are sent from source UDP port number 161, to destination UDP
port number 162, which are the SNMP standard numbers reserved for Trap
PDUs. The unit may be configured to send an additional copy of each Trap PDU
to a user specified destination UDP port number (see sysTrapPort).
11.1
GENERIC TRAPS
SNMP defines seven different traps, which are described below.
•
coldStart (0) – A unit has re-started, and the NMS’s copy of the unit’s
configuration may be incorrect.
•
warmStart (1) – Not used by the unit.
•
linkDown (2) – A port has failed, and the unit’s local management agent has
disabled usage of the port. The “variable-bindings” portion of the trap
contains the ifIndex of the port.
•
linkUp(3) – A port has come back to life, and the unit’s local management
agent has re-enabled usage of the port. The “variable-bindings” portion of the
trap contains the ifIndex of the port.
•
authenticationFailure(4) – This trap is generated whenever the community
name in a PDU does not match the corresponding password. All SetRequest
PDUs must match the configAnyPass (refer to the description of
configGetPass for SetRequest exceptions), GetRequest PDUs must match
either the configGetPass or the configAnyPass. The GetRequest exception is
for one of the debugging attributes; those PDUs must always provide the
configAnyPass.
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