Various SNMP versions

SNMPv1

Send SNMP GET request using the following options:

• with SNMPv1, community ‘public’

• over IPv4/UDP

• to an Agent at localhost:161

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

• Based on asyncio I/O framework

Functionally similar to:

$ snmpget -v1 -c public localhost SNMPv2-MIB::sysDescr.0

import asyncio

from pysnmp.hlapi.asyncio import *


async def run():
    snmpEngine = SnmpEngine()
    errorIndication, errorStatus, errorIndex, varBinds = await getCmd(
        snmpEngine,
        CommunityData("public", mpModel=0),
        UdpTransportTarget(("localhost", 161)),
        ContextData(),
        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]))

    snmpEngine.transportDispatcher.closeDispatcher()


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 localhost: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 public -Cn0 -Cr50

localhost 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,
            CommunityData("public"),
            UdpTransportTarget(("localhost", 161)),
            ContextData(),
            0,
            50,
            *varBinds,
        )
        if errorIndication:
            print(errorIndication)
            break
        elif errorStatus:
            print(
                "{} at {}".format(
                    errorStatus.prettyPrint(),
                    errorIndex and varBinds[int(errorIndex) - 1][0] or "?",
                )
            )
        else:
            for varBindRow in varBindTable:
                for varBind in varBindRow:
                    print(" = ".join([x.prettyPrint() for x in varBind]))

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


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

Download script.

See also: library reference.