Various SNMP versions#

SNMPv1#

Send SNMP GET request using the following options:

with SNMPv1, community ‘public’

over IPv4/UDP

to an Agent at demo.pysnmp.com:161

for an instance of SNMPv2-MIB::sysDescr.0 MIB object

Based on asyncio I/O framework

Functionally similar to:

$ snmpget -v1 -c public demo.pysnmp.com SNMPv2-MIB::sysDescr.0

import asyncio
from pysnmp.hlapi.asyncio.slim import Slim
from pysnmp.smi.rfc1902 import ObjectIdentity, ObjectType


async def run():
    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]))


asyncio.run(run())

Download script.

Bulk walk MIB#

Send a series of SNMP GETBULK requests using the following options:

with SNMPv3, user ‘usr-none-none’, no authentication, no privacy
over IPv4/UDP
to an Agent at demo.pysnmp.com:161
for all OIDs past SNMPv2-MIB::system
run till end-of-mib condition is reported by Agent
based on asyncio I/O framework

Functionally similar to:

$ snmpbulkwalk -v3 -lnoAuthNoPriv -u usr-none-none -Cn0 -Cr50

demo.pysnmp.com SNMPv2-MIB::system

import asyncio
from pysnmp.hlapi.asyncio import *


async def run(varBinds):
    snmpEngine = SnmpEngine()
    while True:
        errorIndication, errorStatus, errorIndex, varBindTable = await bulkCmd(
            snmpEngine,
            UsmUserData("usr-none-none"),
            UdpTransportTarget(("demo.pysnmp.com", 161)),
            ContextData(),
            0,
            50,
            *varBinds,
        )

        if errorIndication:
            print(errorIndication)
            break
        elif errorStatus:
            print(
                f"{errorStatus.prettyPrint()} at {varBinds[int(errorIndex) - 1][0] if errorIndex else '?'}"
            )
        else:
            for varBindRow in varBindTable:
                for varBind in varBindRow:
                    print(" = ".join([x.prettyPrint() for x in varBind]))

        varBinds = varBindTable[-1]
        if isEndOfMib(varBinds):
            break
    return


asyncio.run(
    run([ObjectType(ObjectIdentity("TCP-MIB")), ObjectType(ObjectIdentity("IP-MIB"))])
)

Download script.