# Various SNMP versions

## SNMPv1 TRAP

Send SNMP notification using the following options:

- SNMPv1

- with community name ‘public’

- over IPv4/UDP

- to a Manager at 104.236.166.95:162

- send TRAP notification

- with TRAP ID ‘coldStart’ specified as an OID

- include managed objects information:

- overriding Uptime value with 12345

- overriding Agent Address with ‘104.236.166.95’

- overriding Enterprise OID with 1.3.6.1.4.1.20408.4.1.1.2

- include managed object information ‘1.3.6.1.2.1.1.1.0’ = ‘my system’

Functionally similar to:

$ snmptrap -v1 -c public demo.snmplabs.com 1.3.6.1.4.1.20408.4.1.1.2 104.236.166.95 6 432 12345 1.3.6.1.2.1.1.1.0 s “my system”

    from pysnmp.entity import engine, config
    from pysnmp.carrier.asyncore.dgram import udp
    from pysnmp.entity.rfc3413 import ntforg
    from pysnmp.proto.api import v2c

    # Create SNMP engine instance
    snmpEngine = engine.SnmpEngine()

    # SecurityName <-> CommunityName mapping
    config.addV1System(snmpEngine, 'my-area', 'public', transportTag='all-my-managers')

    # Specify security settings per SecurityName (SNMPv1 -> 0)
    config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 0)

    # Setup transport endpoint and bind it with security settings yielding
    # a target name
    config.addTransport(
        snmpEngine,
        udp.domainName,
        udp.UdpSocketTransport().openClientMode()
    )
    config.addTargetAddr(
        snmpEngine, 'my-nms',
        udp.domainName, ('104.236.166.95', 162),
        'my-creds',
        tagList='all-my-managers'
    )

    # Specify what kind of notification should be sent (TRAP or INFORM),
    # to what targets (chosen by tag) and what filter should apply to
    # the set of targets (selected by tag)
    config.addNotificationTarget(
        snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'trap'
    )

    # Allow NOTIFY access to Agent's MIB by this SNMP model (1), securityLevel
    # and SecurityName
    config.addContext(snmpEngine, '')
    config.addVacmUser(snmpEngine, 1, 'my-area', 'noAuthNoPriv', (), (), (1, 3, 6))

    # *** SNMP engine configuration is complete by this line ***

    # Create Notification Originator App instance.
    ntfOrg = ntforg.NotificationOriginator()

    # Build and submit notification message to dispatcher
    ntfOrg.sendVarBinds(
        snmpEngine,
        # Notification targets
        'my-notification',  # notification targets
        None, '',  # contextEngineId, contextName
        # var-binds
        [
            # Uptime value with 12345
            (v2c.ObjectIdentifier('1.3.6.1.2.1.1.3.0'),
             v2c.TimeTicks(12345)),
            # trap OID: Generic Trap #6 (enterpriseSpecific)
            #           and Specific Trap 432
            (v2c.ObjectIdentifier('1.3.6.1.6.3.1.1.5.1'),
             v2c.ObjectIdentifier('1.3.6.1.4.1.20408.4.1.1.2.0.432')),
            # Agent Address with '127.0.0.1'
            (v2c.ObjectIdentifier('1.3.6.1.6.3.18.1.3.0'),
             v2c.IpAddress('127.0.0.1')),
            # Enterprise OID with 1.3.6.1.4.1.20408.4.1.1.2
            (v2c.ObjectIdentifier('1.3.6.1.6.3.1.1.4.3.0'),
             v2c.ObjectIdentifier('1.3.6.1.4.1.20408.4.1.1.2')),
            # managed object '1.3.6.1.2.1.1.1.0' = 'my system'
            (v2c.ObjectIdentifier('1.3.6.1.2.1.1.1.0'),
             v2c.OctetString('my system'))
        ]
    )

    print('Notification is scheduled to be sent')

    # Run I/O dispatcher which would send pending message and stop
    snmpEngine.transportDispatcher.runDispatcher()

`Download` script.

## SNMPv2c TRAP

Send SNMP TRAP notification using the following options:

- SNMPv2c

- with community name ‘public’

- over IPv4/UDP

- send TRAP notification

- to a Manager at 104.236.166.95:162

- with TRAP ID ‘coldStart’ specified as an OID

- include managed objects information: 1.3.6.1.2.1.1.1.0 = ‘Example Notificator’ 1.3.6.1.2.1.1.5.0 = ‘Notificator Example’

Functionally similar to:

$ snmptrap -v2c -c public 104.236.166.95 12345 1.3.6.1.4.1.20408.4.1.1.2

    from pysnmp.entity import engine, config
    from pysnmp.carrier.asyncore.dgram import udp
    from pysnmp.entity.rfc3413 import ntforg
    from pysnmp.proto.api import v2c

    # Create SNMP engine instance
    snmpEngine = engine.SnmpEngine()

    # SecurityName <-> CommunityName mapping
    config.addV1System(snmpEngine, 'my-area', 'public', transportTag='all-my-managers')

    # Specify security settings per SecurityName (SNMPv2c -> 1)
    config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 1)

    # Setup transport endpoint and bind it with security settings yielding
    # a target name
    config.addTransport(
        snmpEngine,
        udp.domainName,
        udp.UdpSocketTransport().openClientMode()
    )
    config.addTargetAddr(
        snmpEngine, 'my-nms',
        udp.domainName, ('104.236.166.95', 162),
        'my-creds',
        tagList='all-my-managers'
    )

    # Specify what kind of notification should be sent (TRAP or INFORM),
    # to what targets (chosen by tag) and what filter should apply to
    # the set of targets (selected by tag)
    config.addNotificationTarget(
        snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'trap'
    )

    # Allow NOTIFY access to Agent's MIB by this SNMP model (2), securityLevel
    # and SecurityName
    config.addContext(snmpEngine, '')
    config.addVacmUser(snmpEngine, 2, 'my-area', 'noAuthNoPriv', (), (), (1, 3, 6))

    # *** SNMP engine configuration is complete by this line ***

    # Create Notification Originator App instance.
    ntfOrg = ntforg.NotificationOriginator()

    # Error/confirmation receiver
    # noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
    def cbFun(snmpEngine, sendRequestHandle, errorIndication,
              errorStatus, errorIndex, varBinds, cbCtx):
        print('Notification %s, status - %s' % (
            sendRequestHandle, errorIndication and errorIndication or 'delivered'
        )
              )

    # Build and submit notification message to dispatcher
    sendRequestHandle = ntfOrg.sendVarBinds(
        snmpEngine,
        # Notification targets
        'my-notification',  # notification targets
        None, '',  # contextEngineId, contextName
        # var-binds
        [
            # SNMPv2-SMI::snmpTrapOID.0 = SNMPv2-MIB::coldStart
            ((1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0), v2c.ObjectIdentifier((1, 3, 6, 1, 6, 3, 1, 1, 5, 1))),
            # additional var-binds: ( (oid, value), ... )
            ((1, 3, 6, 1, 2, 1, 1, 1, 0), v2c.OctetString('Example Notificator')),
            ((1, 3, 6, 1, 2, 1, 1, 5, 0), v2c.OctetString('Notificator Example'))
        ],
        cbFun
    )

    print('Notification %s is scheduled to be sent' % sendRequestHandle)

    # Run I/O dispatcher which would send pending message and process response
    snmpEngine.transportDispatcher.runDispatcher()

`Download` script.

## SNMPv3 TRAP, auth: MD5, privacy: DES

Send SNMP TRAP notification using the following options:

- SNMPv3

- with user ‘usr-md5-des’, auth: MD5, priv DES

- over IPv4/UDP

- send TRAP notification

- to a Manager at 104.236.166.95:162

- with TRAP ID ‘warmStart’ specified as an OID

- include managed object information 1.3.6.1.2.1.1.5.0 = ‘system name’

Functionally similar to:

$ snmptrap -v3 -l authPriv -u usr-md5-des -A authkey1 -X privkey1 -e 8000000001020304 demo.snmplabs.com 0 1.3.6.1.6.3.1.1.5.1 1.3.6.1.2.1.1.1.0 s “my system”

    from pysnmp.entity import engine, config
    from pysnmp.carrier.asyncore.dgram import udp
    from pysnmp.entity.rfc3413 import ntforg
    from pysnmp.proto.api import v2c

    # Create SNMP engine instance with specific (and locally unique)
    # SnmpEngineId -- it must also be known to the receiving party
    # and configured at its VACM users table.
    snmpEngine = engine.SnmpEngine(
        snmpEngineID=v2c.OctetString(hexValue='8000000001020304')
    )

    # Add USM user
    config.addV3User(
        snmpEngine, 'usr-md5-des',
        config.usmHMACMD5AuthProtocol, 'authkey1',
        config.usmDESPrivProtocol, 'privkey1'
    )
    config.addTargetParams(snmpEngine, 'my-creds', 'usr-md5-des', 'authPriv')

    # Setup transport endpoint and bind it with security settings yielding
    # a target name
    config.addTransport(
        snmpEngine,
        udp.domainName,
        udp.UdpSocketTransport().openClientMode()
    )
    config.addTargetAddr(
        snmpEngine, 'my-nms',
        udp.domainName, ('104.236.166.95', 162),
        'my-creds',
        tagList='all-my-managers'
    )

    # Specify what kind of notification should be sent (TRAP or INFORM),
    # to what targets (chosen by tag) and what filter should apply to
    # the set of targets (selected by tag)
    config.addNotificationTarget(
        snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'trap'
    )

    # Allow NOTIFY access to Agent's MIB by this SNMP model (3), securityLevel
    # and SecurityName
    config.addContext(snmpEngine, '')
    config.addVacmUser(snmpEngine, 3, 'usr-md5-des', 'authPriv', (), (), (1, 3, 6))

    # *** SNMP engine configuration is complete by this line ***

    # Create Notification Originator App instance.
    ntfOrg = ntforg.NotificationOriginator()

    # Build and submit notification message to dispatcher
    ntfOrg.sendVarBinds(
        snmpEngine,
        # Notification targets
        'my-notification',  # notification targets
        None, '',  # contextEngineId, contextName
        # var-binds
        [
            # SNMPv2-SMI::snmpTrapOID.0 = SNMPv2-MIB::coldStart
            ((1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0), v2c.ObjectIdentifier((1, 3, 6, 1, 6, 3, 1, 1, 5, 1))),
            # additional var-binds: ( (oid, value), ... )
            ((1, 3, 6, 1, 2, 1, 1, 5, 0), v2c.OctetString('Notificator Example'))
        ]
    )

    print('Notification is scheduled to be sent')

    # Run I/O dispatcher which would send pending message and process response
    snmpEngine.transportDispatcher.runDispatcher()

`Download` script.

## SNMPv3 INFORM, auth: MD5, privacy: none

Send SNMP INFORM notification using the following options:

- SNMPv3

- with user ‘usr-md5-none’, auth: MD5, priv NONE

- over IPv4/UDP

- to a Manager at demo.snmplabs.com:162

- send INFORM notification

- with TRAP ID ‘warmStart’ specified as an OID

- include managed object information 1.3.6.1.2.1.1.5.0 = ‘system name’

Functionally similar to:

$ snmpinform -v3 -l authNoPriv -u usr-md5-none -A authkey1 demo.snmplabs.com 0 1.3.6.1.6.3.1.1.5.1 1.3.6.1.2.1.1.5.0 = ‘system name’

    from pysnmp.entity import engine, config
    from pysnmp.carrier.asyncore.dgram import udp
    from pysnmp.entity.rfc3413 import ntforg
    from pysnmp.proto.api import v2c

    # Create SNMP engine instance
    snmpEngine = engine.SnmpEngine()

    # Add USM user
    config.addV3User(
        snmpEngine, 'usr-md5-none',
        config.usmHMACMD5AuthProtocol, 'authkey1'
    )
    config.addTargetParams(snmpEngine, 'my-creds', 'usr-md5-none', 'authNoPriv')

    # Setup transport endpoint and bind it with security settings yielding
    # a target name
    config.addTransport(
        snmpEngine,
        udp.domainName,
        udp.UdpSocketTransport().openClientMode()
    )
    config.addTargetAddr(
        snmpEngine, 'my-nms',
        udp.domainName, ('104.236.166.95', 162),
        'my-creds',
        tagList='all-my-managers'
    )

    # Specify what kind of notification should be sent (TRAP or INFORM),
    # to what targets (chosen by tag) and what filter should apply to
    # the set of targets (selected by tag)
    config.addNotificationTarget(
        snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'inform'
    )

    # Allow NOTIFY access to Agent's MIB by this SNMP model (3), securityLevel
    # and SecurityName
    config.addContext(snmpEngine, '')
    config.addVacmUser(snmpEngine, 3, 'usr-md5-none', 'authNoPriv', (), (), (1, 3, 6))

    # *** SNMP engine configuration is complete by this line ***

    # Create Notification Originator App instance.
    ntfOrg = ntforg.NotificationOriginator()

    # Error/confirmation receiver
    # noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
    def cbFun(snmpEngine, sendRequestHandle, errorIndication,
              errorStatus, errorIndex, varBinds, cbCtx):
        print('Notification %s, status - %s' % (
            sendRequestHandle, errorIndication and errorIndication or 'delivered'
        )
              )

    # Build and submit notification message to dispatcher
    sendRequestHandle = ntfOrg.sendVarBinds(
        snmpEngine,
        'my-notification',  # notification targets
        None, '',  # contextEngineId, contextName
        # var-binds: SNMPv2-MIB::coldStart, ...
        [((1, 3, 6, 1, 6, 3, 1, 1, 5, 1), v2c.ObjectIdentifier((1, 3, 6, 1, 6, 3, 1, 1, 5, 1))),
         ((1, 3, 6, 1, 2, 1, 1, 5, 0), v2c.OctetString('system name'))],
        cbFun
    )

    print('Notification %s scheduled to be sent' % sendRequestHandle)

    # Run I/O dispatcher which would send pending message and process response
    snmpEngine.transportDispatcher.runDispatcher()

`Download` script.

See also: library-reference.