Monitor SNMP Trap

The Monitor SNMP Trap object waits for an event to occur either in the Microsoft SNMP Trap Service, or on a port that you specify. Using filters, you can trigger your Policies according to the device that raised the event or the enterprise, generic, or specific identifiers of the SNMP trap.

To configure SNMP version 3 security (if you are not using the Microsoft SNMP Trap Service), use the SNMP Options in the Client (click the Options menu and select SNMP).

How it is used

Use the Monitor SNMP Trap object to monitor a network device for critical errors and automatically create a trouble ticket and perform level 1 diagnostics on the device.

Configuration

To configure the Monitor SNMP Trap object you need to know the version of SNMP that you are using, the source host IP address, the enterprise identifier of the device, and the generic or specific identifier of the device that you are monitoring.

Details Tab

 

Microsoft SNMP Trap Service (SNMPv1, SNMPv2c)	Select this option to use the Microsoft SNMP Trap Service. This service is only compatible with SNMP versions SNMPv1 and SNMPv2c.
No dependency (SNMPv1, SNMPv2c, SNMPv3)	Select this option to monitor SNMP traps using a port rather than the Microsoft SNMP Trap Service.
Port	If you select the No dependency option, type the number of the communication port that will be monitored for SNMP traps. If you select port 162, the Microsoft SNMP Trap Service must be disabled because it uses the same port when it runs.
Source host	Select to specify the IP address of the device where the event originates.
Enterprise identifier	Select to specify the enterprise identifier of the event raised by the device.
Generic identifier	Select to specify the generic identifier of the SNMP trap. There are six options available: • coldStart(0) – Select to filter for a cold start of the network device. This option has a numerical value of 0. • warmStart(1) – Select to filter for a warm start of the network device. This option has a numerical value of 1. • linkDown(2) – Select to filter for a severed connection to the network device. This option has a numerical value of 2. • linkUp(3) – Select to filter for a re-established connection to the network device. This option has a numerical value of 3. • authenticationFailure(4) – Select to filter for a failed SNMP authentications to the network device. This option has a numerical value of 4. • egpNeighborLoss(5) – Select to filter for a lost connection to an EGP neighbor. This option has a numerical value of 5. • enterpriseSpecific(6) – Select to filter based on an enterprise specific id. This option has a numerical value of 6. You must specify this option to filter based on a Specific identifier.
Specific identifier	Select to specify an enterprise specific identifier for the SNMP trap. This field becomes active when you select the enterpriseSpecific(6) option of the Generic identifier field (above).

Advanced Tab

Objects that you add to the Object identifiers list become Published Data items when a matching object is found on the Details tab.

Note: The Monitor SNMP Trap object launches even if there are no objects in this list, or if the objects do not correspond to the variable bindings reported by the SNMP trap. This list is used only to create new Published Data items.

To add objects:

1.	Click Add. The Add object identifier filter dialog appears.

2.	In the OID field, type the object ID number.

3.	Click OK. The object appears in the list.

Available Published Data

 

Name	Description
Source IP address	The IP address of the device where the trap originated.
Enterprise Id	The enterprise Id of the trap.
Generic Id	The generic Id of the trap.
Specific Id	The specific Id of the trap. The value of the specific identifier is returned when using the enterpriseSpecific(6) option of the Generic identifier field. Otherwise, a value of 0 (zero) is returned.
Trap port	The port where the trap was received.
Varbind count	The number of variable bindings received.
SNMP Version	The SNMP version that was specified for this trap.

In addition to these Published Data items, objects that you added to the Object identifiers list on the Advanced tab become Published Data items when they match an object found on the Details tab.

Common Published Data