SNMP
245
ID: um_tsmux
CP525 cMux User’s Manual Rev. 5.20.12 (3944)
9.5.4 Matching of on/off traps
As mentioned previously, a
unitAlarmCleared
message is sent after a
unitAlarmAssert-
ed
message and a
unitDetailedAlarmCleared
message is sent after a
unitDetailedAlar-
mAsserted
message.
The “cleared” event contains exactly the same identifiers as the “asserted” trap. This includes
the alarm ID,
subid1
,
subid2
and
subid3
fields. This set of four identifiers uniquely identifies
the source of an alarm.
A more easy way to match the traps is by using the
unitEventRefNumber
field. This is a
simple integer that is the same in an “asserted” trap and in a “clear” trap.
9.5.5 Legacy trap messages
Note:
The information in this section relates to trap definitions that
are marked as
deprecated
in
VIGW-UNIT-MIB
. They are included for
backwards compatibility with earlier product versions and should not be
used for new deployments.
The legacy traps are defined under the
vigwLegacyTraps
node. Transmission of these traps is
specified by selecting “SNMPv1 (Legacy)” for the trap version field. The format of these traps
follow the SNMPv1 trap format.
In contrast to the SNMPv2 alarm messages, the SNMPv1 messages has its severity implicitly
encoded in the trap type.
The trap messages are defined in
Table 9.3
List of legacy (SNMPv1) traps
alarmCleared
This trap is sent when an alarm goes off (i.e. is cleared) in the system. The binding
unitTrapHistoryRefNumber
matches the corresponding
unitTrapHistoryRefNumber
in
the “raise” trap message.
alarmIndeterminate
This trap is sent when an alarm with severity level “notification” (level 2) is generated.
alarmWarning
This trap is sent when an alarm with severity level “warning” is generated.
alarmMinor
This trap is sent when an alarm with severity level “minor” is generated.
alarmMajor
This trap is sent when an alarm with severity level “major” is generated.
alarmCritical
This trap is sent when an alarm with severity level “critical” is generated.
All these trap messages contain variable bindings from the
unitTrapHistoryTable
. This table
is filled up with historical trap messages, only when SNMPv1 mode is selected.
The fields in these traps are fetched from the
unitAlarmTrapHistoryTable
. The meaning of
these fields correspond to the fields in the
unitEventHistoryTable
for SNMPv2 traps and are
not described in more detail here.
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