1. Administration Guide
  2. Fault Trap Notification Contents

B Fault Trap Notification Contents

A northbound interface fault trap contains specific information about the device from which it originates and OCSDM, which manages this device.

The OCSDM fault manager forwards an SNMP trap fault notification that is originated from the managed object instance (device or device object) that it manages to a network management system (such as an SNMP manager) through its northbound interface. The northbound network management system uses the SNMP trap fault notification sent by the managed object instance to identify specifically where the originator of the SNMP trap fault notification comes from. Network administrators use the information contained in the trap received by the northbound system to identify the origin of faults because this northbound system receives traps from many sources over the entirety of its network so that any problems can be addressed quickly and efficiently as they occur.

This list describes the way information is formatted in the SNMP trap fault notification originating from a specific device that a specific OCSDM standalone server or server cluster manages:

  • MO_Name::=<ManagedObjectClassName>
  • SDMGlobalName::=<SDMGlobalNameString>
  • IP_address::= The trap originator's IP address
  • MO_Detail::=<ManagedObjectKeyAttrNameAndValPairs>
  • ManagedObjectKeyAttrNameAndValPairs::=<attrName>=<attrValue>;<attrName>=<attrValue>

Note:

The MO_Detail parameter of a managed object instance is empty if there is one alarm only on a device.

Table B-1 SNMP trap fault notification example from a managed object

Information About Managed Object Instance Description
Fan.nnc_srv_1;172.30.80.0;location=middle Alarm from the middle fan on a device at 172.30.80.0
SessionAgent.nnc_srv_1;172.30.80.100;name=sa-tge-1 Alarm from the session agent “sa-tge-1” on a device at 172.30.80.100
HotPlugablePort.nnc_srv_1;172.30.80.200;slot=01;port=01;presence=removed Alarm from removing a physical port on a device at 172.30.80.200
CPU.nnc_srv_1;172.30.80.0;apSysCPUUtil Alarm in apSysMgmtGroupTrap, apSysCPUUtil, type

Fault notification is in the form of a severity alarm that provides information about detected faults or abnormal conditions. The following table shows how OCSDM severity alarms map to ITU X.733 severity alarms used by a northbound network management system.

Table B-2 OCSDM Severity Alarm Mapping to ITU X.733 Severity Alarms

OCSDM Severity Alarms ITU X.733 Severity Alarms
Emergency/Critical Critical
Major Major
Minor Minor
Warning Warning
Clear Clear
Unknown Indeterminate