Think, you cannot remove the indentified trap. DFM may display an event as an Unidentified Trap. Normally an Unidentified Trap is reported when an event occurs on a device that is being discovered by DFM. You can get more information on an Unidentified Trap by looking at its Events page.
Pass-Through SNMP Unidentified Traps are traps that DFM receives from devices that are not in the DFM inventory. These traps are shown in the Alerts and Activities display because of their relevance to fault monitoring. Pass-through traps are displayed as follows:
As one of the following events:
InformAlarm
MinorAlarm
MajorAlarm
With the device type and the device name from which it was generated
If DFM does not know which device generated the trap, it ignores the trap