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():
    slim = Slim(1)
    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]))

    slim.close()


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:
        bulk_task = await bulkCmd(
            snmpEngine,
            UsmUserData('usr-none-none'),
            UdpTransportTarget(('demo.pysnmp.com', 161)),
            ContextData(),
            0,
            50,
            *varBinds
        )
        (errorIndication, errorStatus, errorIndex, varBindTable) = await bulk_task
        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
    return


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

Download script.

See also: library reference.