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 version is a fork of Ilya Etingof's project etingof/pysnmp. 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 2.4 though 3.7
- 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 (RC3413)
Download & Install
The PySNMP software is freely available for download from PyPI
and GitHub.
Just run:
$ pip install pysnmplib
To download and install PySNMP along with its dependencies:
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.snmplabs.com sysDescr.0
SNMPv2-MIB::sysDescr.0 = STRING: Linux zeus 4.8.6.5-smp
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 import *
iterator = getCmd(SnmpEngine(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ContextData(),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)))
errorIndication, errorStatus, errorIndex, varBinds = next(iterator)
if errorIndication:
print(errorIndication)
else:
if errorStatus:
print('%s at %s' % (errorStatus.prettyPrint(), varBinds[int(errorIndex)-1] if errorIndex else '?'))
else:
for varBind in varBinds:
print(' = '.join([x.prettyPrint() for x in varBind]))
This is how to send SNMP TRAP:
from pysnmp.hlapi import *
errorIndication, errorStatus, errorIndex, varBinds = next(
sendNotification(
SnmpEngine(OctetString(hexValue='8000000001020304')),
UsmUserData('usr-sha-aes128', 'authkey1', 'privkey1',
authProtocol=usmHMACSHAAuthProtocol,
privProtocol=usmAesCfb128Protocol),
UdpTransportTarget(('demo.snmplabs.com', 162)),
ContextData(),
'trap',
NotificationType(ObjectIdentity('SNMPv2-MIB', 'authenticationFailure'))
)
)
if errorIndication:
print(errorIndication)
We maintain publicly available SNMP Agent and TRAP sink at
demo.snmplabs.com. You are
welcome to use it while experimenting with whatever SNMP software you deal with.
:warning: This is no longer the case as the snmplabs.com site is now defunct
$ python3 examples/hlapi/asyncore/sync/manager/cmdgen/usm-sha-aes128.py
SNMPv2-MIB::sysDescr.0 = SunOS zeus.snmplabs.com 4.1.3_U1 1 sun4m
$
$ python3 examples//hlapi/asyncore/sync/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, FTP sites
or local directories. You could configure any MIB source available to you (including
this one) for that purpose.
For more example scripts please refer to examples section
at pysnmp web site.
Documentation
Library documentation and examples can be found at the pysnmp project site.
If something does not work as expected, please
open an issue at GitHub or
post your question on Stack Overflow or try browsing pysnmp
mailing list archives.
Bug reports and PRs are appreciated! ;-)
Copyright (c) 2005-2019, Ilya Etingof. All rights reserved.