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Description:

pysnmp 7.1.0

SNMP Library for Python

This is a pure-Python, open source and free implementation of v1/v2c/v3
SNMP engine distributed under 2-clause BSD license.
The PySNMP project was initially sponsored by a PSF grant.
Thank you!
This repo is derived from Ilya Etingof's project etingof/pysnmp, but LeXtudio Inc. has taken over the entire PySNMP ecosystem, including the library, documentation, and the website.
Ilya sadly passed away on 10-Aug-2022. Announcement here. His work is still of great use to the Python community and he will be missed.
Features

Complete SNMPv1/v2c and SNMPv3 support
SMI framework for resolving MIB information and implementing SMI
Managed Objects
Complete SNMP entity implementation
USM Extended Security Options support (3DES, 192/256-bit AES encryption)
Extensible network transports framework (UDP/IPv4, UDP/IPv6)
Asynchronous socket-based IO API support
Asyncio integration
PySMI integration for dynamic MIB compilation
Built-in instrumentation exposing protocol engine operations
Python eggs and py2exe friendly
100% Python, works with Python 3.8+
MT-safe (if SnmpEngine is thread-local)

Features, specific to SNMPv3 model include:

USM authentication (MD5/SHA-1/SHA-2) and privacy (DES/AES) protocols (RFC3414, RFC7860)
View-based access control to use with any SNMP model (RFC3415)
Built-in SNMP proxy PDU converter for building multi-lingual
SNMP entities (RFC2576)
Remote SNMP engine configuration
Optional SNMP engine discovery
Shipped with standard SNMP applications (RFC3413)

Download & Install
The PySNMP software is freely available for download from PyPI
and GitHub.
Just run:
$ pip install pysnmp

To download and install PySNMP along with its dependencies:

PyASN1
PySMI (required for MIB services only)
Optional pysnmpcrypto package
whenever strong SNMPv3 encryption is desired

Besides the library, command-line SNMP utilities
written in pure-Python could be installed via:
$ pip install snmpclitools

and used in the very similar manner as conventional Net-SNMP tools:
$ snmpget.py -v3 -l authPriv -u usr-md5-des -A authkey1 -X privkey1 demo.pysnmp.com sysDescr.0
SNMPv2-MIB::sysDescr.0 = STRING: Linux zeus 4.8.6.5-smp #2 SMP Sun Nov 13 14:58:11 CDT 2016 i686

Examples
PySNMP is designed in a layered fashion. Top-level and easiest to use API is known as
hlapi. Here's a quick example on how to SNMP GET:
from pysnmp.hlapi.v3arch.asyncio import *
from pysnmp.smi.rfc1902 import ObjectIdentity, ObjectType

with Slim(1) as slim:
errorIndication, errorStatus, errorIndex, varBinds = await slim.get(
'public',
'demo.pysnmp.com',
161,
ObjectType(ObjectIdentity("SNMPv2-MIB", "sysDescr", 0)),
)

if errorIndication:
print(errorIndication)
elif errorStatus:
print(
"{} at {}".format(
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex) - 1][0] or "?",
)
)
else:
for varBind in varBinds:
print(" = ".join([x.prettyPrint() for x in varBind]))

This is how to send SNMP TRAP:
from pysnmp.hlapi.v3arch.asyncio import *

snmpEngine = SnmpEngine()
errorIndication, errorStatus, errorIndex, varBinds = await sendNotification(
snmpEngine,
CommunityData('public', mpModel=0),
await UdpTransportTarget.create(('demo.pysnmp.com', 162)),
ContextData(),
"trap",
NotificationType(ObjectIdentity("1.3.6.1.6.3.1.1.5.2")).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")),
),
)

if errorIndication:
print(errorIndication)

snmpEngine.closeDispatcher()

We maintain publicly available SNMP Agent and TRAP sink at
demo.pysnmp.com. You are
welcome to use it while experimenting with whatever SNMP software you deal with.

$ python3 examples/hlapi/asyncio/manager/cmdgen/usm-sha-aes128.py
SNMPv2-MIB::sysDescr.0 = SunOS zeus.pysnmp.com 4.1.3_U1 1 sun4m
$
$ python3 examples/hlapi/asyncio/agent/ntforg/v3-inform.py
SNMPv2-MIB::sysUpTime.0 = 0
SNMPv2-MIB::snmpTrapOID.0 = SNMPv2-MIB::warmStart
SNMPv2-MIB::sysName.0 = system name

Other than that, PySNMP is capable to automatically fetch and use required MIBs from HTTP sites
or local directories. You could configure any MIB source available to you (including
this one) for that purpose.
For more sample scripts please refer to examples section
at PySNMP web site.
Documentation
Library documentation can be found at the PySNMP docs site.
If something does not work as expected, please learn the support options.
Pull requests are appreciated! ;-)
Copyright (c) 1999-2020, Ilya Etingof.
Copyright (c) 2022-2024, LeXtudio Inc.
Copyright (c) 1999-2024, Other PySNMP contributors.
All rights reserved.