Trap tags are SNMP messages sent by the agent to the manager. When an event occurs, the monitored device send a UDP packet alert to XRatel SNMP Server. The most common traps with its OID are:
 

coldStart(1.3.6.1.2.1.11.0.0): Indicates when the device is starting.

warmStart(1.3.6.1.2.1.11.0.1): Sent when the device was restarted.

linkDown(1.3.6.1.2.1.11.0.2): An interface has changed from up to down state.

linkUp(1.3.6.1.2.1.11.0.3): Occurs when an interface changes from down to up state.

authenticationFailure(1.3.6.1.2.1.11.0.4): Indicates an invalid community received by the device.
 

Trap tags Configuration

Trap tags need to be added manually. Add a new Raw tag. In the tag Properties dialog, specify the tag Name, the SNMP OID of the trap, and then, select Trap tag in tag Type field.

Click on OK button to apply the changes.

XRatel SNMP Server supports variables in trap tags too. To add variables to a trap, open its tag Properties dialog and in the SNMP OID field insert the trap OID and variables separeted by ";" like in:

<SNMP OID>;<Variable1>;<Variable2>;...;<VariableN>

So, to manage the linkDown trap of the interface 1.3.6.1.2.1.2.2.1.1.3(ifIndex) insert:

1.3.6.1.2.1.11.0.2;1.3.6.1.2.1.2.2.1.1.3
 

If the above variable is missed, the server will alert a linkDown trap without specifying the source interface.

When a trap is received by the XRatel SNMP Server, a hold time is applied to it. This field is defined in Device Settings dialog.

Select the desired device in tag List and then click on Device Properties button. The Trap Hold Time field indicates the hold time in milliseconds.