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Trap Watch

The Trap Watch tool allows you to monitor and examine details of incoming notifications (traps and inform requests) from SNMP agents. Unlike the other tools currently provided in MIB Views, the Trap Watch tool is not tied to an individual agent, but rather an individual port or ports. Thus, the Trap Watch tool is displayed in a separate window from the other tools.

To open the Trap Watch tool, select the ToolsTrap Watch menu item. You'll be asked to select a port to monitor for incoming notifications, as shown below. SNMP agents normally send traps to port 162, the default.

Trap Port Configuration

Figure - Trap Port Configuration

SNMPv3 parameters may also be configured for receiving and responding to SNMPv3 Inform Request PDUs using the specified username and optional authentication and privacy passwords. The SNMP Engine ID of your MIB Views installation is shown and is generated the first time you run the application, but be changed if you desire. For SNMPv3 Inform Requests, the recipient (MIB Views) is considered the authoritative SNMP Engine, so the passwords are localized to this Engine ID. The agent sending the inform request needs to be configured to match if using privacy and/or authentication.

On Unix platforms, including Mac OS X, administrator priviledges are required to bind (listen) to port 162. On these platforms, a separate daemon is provided, called nmtrapd, whose only job is to listen to incoming traps and forward them on to connected clients. This daemon is compatible with Scotty's similar daemons, called straps in 2.x and nmtrapd in 3.x. See Trap Reflector Daemon Installation for more information.
Trap Watch

Figure - Trap Watch

You can have multiple Trap Watch tool windows open, each monitoring different ports. After selecting a port, the Trap Watch tool will open and will display traps as they're received.

  • iconClick the Settings button to change the port configuration for the Trap Watch window.
  • iconClick the Clear button to clear the event log.

Select an event from the Event Summary list to display details for that event -- that is, all of the values provided in the variable bindings, including values extracted from the instance identifiers for tabular data.

Tip: Click on a column header to sort events by time, source, event name (snmpTrapOID value), or event description.
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