Common notifications

SNMPv1 TRAP with defaults

Send SNMPv1 TRAP through unified SNMPv3 message processing framework using the following options:

• SNMPv1
• with community name ‘public’
• over IPv4/UDP
• send TRAP notification
• with Generic Trap #1 (warmStart) and Specific Trap 0
• with default Uptime
• with default Agent Address
• with Enterprise OID 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 0.0.0.0 1 0 0 1.3.6.1.2.1.1.1.0 s “my system”

from twisted.internet.task import react
from pysnmp.hlapi.v3arch.twisted import *


def success(args, hostname):
    errorStatus, errorIndex, varBinds = args

    if errorStatus:
        print('%s: %s at %s' % (
            hostname,
            errorStatus.prettyPrint(),
            errorIndex and varBinds[int(errorIndex) - 1][0] or '?'
        )
              )

    else:
        for varBind in varBinds:
            print(' = '.join([x.prettyPrint() for x in varBind]))


def failure(errorIndication, hostname):
    print('%s failure: %s' % (hostname, errorIndication))


# noinspection PyUnusedLocal
def run(reactor, hostname):

    deferred = sendNotification(
        SnmpEngine(),
        CommunityData('public', mpModel=0),
        UdpTransportTarget((hostname, 162)),
        ContextData(),
        'trap',
        NotificationType(
            ObjectIdentity('1.3.6.1.6.3.1.1.5.2')
        ).loadMibs(
            'SNMPv2-MIB'
        ).addVarBinds(
            ('1.3.6.1.6.3.1.1.4.3.0', '1.3.6.1.4.1.20408.4.1.1.2'),
            ('1.3.6.1.2.1.1.1.0', OctetString('my system'))
        )
    )

    deferred.addCallback(success, hostname).addErrback(failure, hostname)

    return deferred


react(run, ['demo.snmplabs.com'])

Download script.

SNMPv2c TRAP via Twisted inline callbacks

Send SNMPv2c TRAP through unified SNMPv3 message processing framework using the following options:

• SNMPv2c
• with community name ‘public’
• over IPv4/UDP
• send TRAP notification
• with Generic Trap #1 (warmStart) and Specific Trap 0
• include managed object information ‘1.3.6.1.2.1.1.1.0’ = ‘my system’

Functionally similar to:

$ snmptrap -v2c -c public demo.snmplabs.com 12345 1.3.6.1.6.3.1.1.5.2 1.3.6.1.2.1.1.1.0 s “Hello from Twisted”

from twisted.internet.task import react, defer
from pysnmp.hlapi.v3arch.twisted import *


@defer.inlineCallbacks
def sendtrap(reactor, snmpEngine, hostname):

    deferred = sendNotification(
        snmpEngine,
        CommunityData('public', mpModel=1),
        UdpTransportTarget((hostname, 162)),
        ContextData(),
        'trap',
        NotificationType(
            ObjectIdentity('1.3.6.1.6.3.1.1.5.2')
        ).loadMibs(
            'SNMPv2-MIB'
        ).addVarBinds(
            ObjectType(ObjectIdentity('1.3.6.1.2.1.1.1.0'), OctetString('Hello from Twisted'))
        )
    )

    yield deferred


# Preserve SnmpEngine instance across [potentially] multiple calls to safe on initialization
snmpEngine = SnmpEngine()

react(sendtrap, [snmpEngine, 'demo.snmplabs.com'])

Download script.

See also: library reference.