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For localhost monitoring, the Real-time SNMP Trap Listener tool allows you to visualize all of the SNMP traps and their characteristics received by the PATROL Agent and Monitoring Studio. This tool is particularly helpful when you want to setup a SNMP Trap listening object in Monitoring Studio but you ignore the characteristics of the traps you want to detect.
 Only SNMP version 1 is supported for SNMP trap listening. SNMP v2c and v3 traps are not supported.
To access the SNMP Trap Listener tool
| 1. | Right-click the main Monitoring Studio icon > KM commands > Tools > Real-time SNMP Trap Listener. |
| ▪ | The incoming SNMP traps are shown in this window as soon as they arrive. |
| ▪ | You can view their main characteristics (originating IP address, community, Enterprise OID, and trap specific number) as well as their attached varbinds (variable bindings). This will help you specify the search criteria in the SNMP Trap Listening wizard. |
| ▪ | The newest (or latest arrived) trap is shown first in the list. |
| 2. | Pause if you wish to stop the reception of traps and have more time to analyze the characteristics of the previously arrived traps. |
| 3. | Resume to resume the listening. |
| 4. | Close to quit the tool window. |
 Due to an SNMP protocol limitation, it is not possible to have more than one program on one computer listening to SNMP traps (handling the UDP/162 port). If another program is listening to SNMP traps, Monitoring Studio is not able to listen for SNMP traps and an error message is shown. For the same reason, it is not possible to use this tool and listen for SNMP traps from a Monitoring Studio object in the PATROL Console. It may just be one or the other.
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