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.