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Chapter 13
| Basic Administration Protocols
Simple Network Management Protocol
Table 30: Supported Notification Messages
Model
RFC 1493 Traps
newRoot
topologyChange
SNMPv2 Traps
coldStart
warmStart
linkDown
1
1
linkUp
1
authenticationFailure
RMON Events (V2)
risingAlarm
fallingAlarm
Level
1.3.6.1.2.1.17.0.1
1.3.6.1.2.1.17.0.2
1.3.6.1.6.3.1.1.5.1
1.3.6.1.6.3.1.1.5.2
1.3.6.1.6.3.1.1.5.3
1.3.6.1.6.3.1.1.5.4
1.3.6.1.6.3.1.1.5.5
1.3.6.1.2.1.16.0.1
1.3.6.1.2.1.16.0.2
– 394 –
Group
The newRoot trap indicates that the
sending agent has become the new root
of the Spanning Tree; the trap is sent by a
bridge soon after its election as the new
root, e.g., upon expiration of the Topology
Change Timer immediately subsequent to
its election.
A topologyChange trap is sent by a bridge
when any of its configured ports
transitions from the Learning state to the
Forwarding state, or from the Forwarding
state to the Discarding state. The trap is
not sent if a newRoot trap is sent for the
same transition.
A coldStart trap signifies that the SNMPv2
entity, acting in an agent role, is
reinitializing itself and that its
configuration may have been altered.
A warmStart trap signifies that the
SNMPv2 entity, acting in an agent role, is
reinitializing itself such that its
configuration is unaltered.
A linkDown trap signifies that the SNMP
entity, acting in an agent role, has
detected that the ifOperStatus object for
one of its communication links is about to
enter the down state from some other
state (but not from the notPresent state).
This other state is indicated by the
included value of ifOperStatus.
A linkUp trap signifies that the SNMP
entity, acting in an agent role, has
detected that the ifOperStatus object for
one of its communication links left the
down state and transitioned into some
other state (but not into the notPresent
state). This other state is indicated by the
included value of ifOperStatus.
An authenticationFailure trap signifies
that the SNMPv2 entity, acting in an agent
role, has received a protocol message that
is not properly authenticated. While all
implementations of the SNMPv2 must be
capable of generating this trap, the
snmpEnableAuthenTraps object indicates
whether this trap will be generated.
The SNMP trap that is generated when an
alarm entry crosses its rising threshold
and generates an event that is configured
for sending SNMP traps.
The SNMP trap that is generated when an
alarm entry crosses its falling threshold
and generates an event that is configured
for sending SNMP traps.
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