SNMP Trap example

Translation of SNMP Trap to standard notificationshows an example of a simple trap and how values in the trap might populate fields in a Service Assurance notification. In this example, the SNMP trap consists of five values:

1. Enterprise OID

2. Generic Trap Number

3. Specific Trap Number

4. System Name—The system name sent by the trap translates into the instance name.

5. Varbind 1—Varbind 1 translates into a text message for the notification.

   Other fields in the notification get populated from values placed in the configuration file. For example, the ClassName is Host not because the information was sent with the trap, but because an association was made in the configuration file.

   .1.3.6.1.4.1.2.1

   0

   0

   HostNYC8

   Operator requested reboot

   SNMP Trap (simplified)

   .1.3.6.1.4.1.2.1

   0

   0

   HostNYC8

   Operator requested reboot

   Enterprise OID

   Generic Trap Number

   Specific Trap Number

   System Name

   Varbind 1

   Incoming SNMP Trap

   Cold Start

   HostNYC8

   InstanceName

   EventName

   Host

   ClassName

   EventType

   MOMENTARY

   EventText

   Agent HostNYC restarted, reason=Operator requested reboot

   Severity

   5

   Standard Notification Fields

   For this example, no translation into any standard notification fields. These fields are used as keys to the configuration file.

   Figure 1. Translation of SNMP Trap to standard notification

   The following is an example of a portion of the configuration file used by the VoIP Notification Trap Adapter. This example corresponds to Translation of SNMP Trap to standard notification. When the trap matches a trap definition (Enterprise OID, generic trap number, and specific trap number), the VoIP Notification Trap Adapterpopulates attributes in a notification based on entries in the trap definition. In the example, the standard notification attribute ClassName is populated with the value "Host."

   BEGIN_TRAP  .1.3.6.1.4.1.2.1  0  0
   ClassName:   Host
   InstanceName:   $SYS$
   EventName:   Cold Start
   Severity:   5
   EventType:   MOMENTARY
   EventText:   Agent $SYS$ restarted, reason=$V1$
   END_TRAP