Arris CHP Max5000, Equipment Manual

Page: 164 / 267

6-44 CHP Max™ Headend Optics Platform Chassis, Controllers and Power Supplies 1508685 Rev D
Figure 6.30
Trap Command
Sequence Diagram
All SNMP traps are HMS enterprise traps based on the SCTE-HMS standard. The trap
variables that are supported by the SCTE-HMS-HE-COMMON-MIB (ANSI/SCTE 84-1 2003) file
have been extended and ARRIS is including a chpHeadendCommon.MIB MIB that includes
three trap variables in addition to the trap variables supported by the HMS standard. The
HMS standard uses one trap (OID of 1.3.6.1.4.1.5591.1.1.0) and its variable bindings contain
the information about the problem that caused the trap. Table 6.10 provides information on
the trap SCTE-HMS-HE-COMMON-MIB (ANSI/SCTE 84-1 2003). The Standard IETF Cold Start
trap, IETF authentication trap and the IETF entity mib configuration change trap
(1.3.6.1.2.1.47.1) is also supported.
SMM polls modules at fixed intervals for alarm information and reports information when
alarm state has changed. The following notifications are supported:
■
heCommonAlarmEvent
Table 6.10 Description of HMS Trap
OID Name Variable Type Description
heCommonLogIndex Integer32 An index that uniquely identifies an entry in the log
table.
heCommonLogOID OBJECT
IDENTIFIER
The specific OID of the object that has changed alarm
state.
heCommonLogValue Integer32 The value of the object at the time it changed alarm
state.
heCommonLogState INTEGER The new alarm state of the object which caused the
event to be recorded into the log.
heCommonLogTime DateAndTime This is the time when the alarm change for the object
occurred.
heCommonLogText DisplayString This is a text field describing the alarm. This field
could be a zero length string in certain agent
implementations.
heCommonLogModuleId
OID
OBJECT
IDENTIFIER
This is the module ID OID as found in the Physical
Entity table of the object that has changed alarm
state.
heCommonLogCardTyp
e
DisplayString This is a card type as described in the Physical Entity
table.
heCommonLogAlias DisplayString This is alias value as described in the Physical Entity
table.
The agent detects that a predetermined event
has occurred and sends a trap PDU to the
NMS Agent