TRAP/INFORM notification

pysnmp.hlapi.sendNotification(snmpEngine, authData, transportTarget, contextData, notifyType, varBinds, **options)

Creates a generator to send one or more SNMP notifications.

On each iteration, new SNMP TRAP or INFORM notification is send (RFC 1905#section-4,2,6). The iterator blocks waiting for INFORM acknowlegement to arrive or error to occur.

  • snmpEngine (SnmpEngine) – Class instance representing SNMP engine.
  • authData (CommunityData or UsmUserData) – Class instance representing SNMP credentials.
  • transportTarget (UdpTransportTarget or Udp6TransportTarget) – Class instance representing transport type along with SNMP peer address.
  • contextData (ContextData) – Class instance representing SNMP ContextEngineId and ContextName values.
  • notifyType (str) – Indicates type of notification to be sent. Recognized literal values are trap or inform.
  • varBinds (tuple) – Single NotificationType class instance representing a minimum sequence of MIB variables required for particular notification type. Alternatively, a sequence of ObjectType objects could be passed instead. In the latter case it is up to the user to ensure proper Notification PDU contents.
Other Parameters:


Request options:

  • lookupMib - load MIB and resolve response MIB variables at the cost of slightly reduced performance. Default is True.
  • errorIndication (str) – True value indicates SNMP engine error.
  • errorStatus (str) – True value indicates SNMP PDU error.
  • errorIndex (int) – Non-zero value refers to varBinds[errorIndex-1]
  • varBinds (tuple) – A sequence of ObjectType class instances representing MIB variables returned in SNMP response.

PySnmpError – Or its derivative indicating that an error occurred while performing SNMP operation.


The sendNotification generator will be exhausted immidiately unless an instance of NotificationType class or a sequence of ObjectType varBinds are send back into running generator (supported since Python 2.6).


>>> from pysnmp.hlapi import *
>>> g = sendNotification(SnmpEngine(),
...                      CommunityData('public'),
...                      UdpTransportTarget(('', 162)),
...                      ContextData(),
...                      'trap',
...                      NotificationType(ObjectIdentity('IF-MIB', 'linkDown')))
>>> next(g)
(None, 0, 0, [])