Walking operations¶

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.snmplabs.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.snmplabs.com SNMPv2-MIB::system

import asyncio
from pysnmp.hlapi.v3arch.asyncio import *


@asyncio.coroutine
def run(varBinds):

    snmpEngine = SnmpEngine()

    while True:
        iterator = bulkCmd(
            snmpEngine,
            UsmUserData('usr-none-none'),
            UdpTransportTarget(('demo.snmplabs.com', 161)),
            ContextData(),
            0, 50,
            *varBinds
        )

        errorIndication, errorStatus, errorIndex, varBindTable = yield from iterator

        if errorIndication:
            print(errorIndication)
            break

        elif errorStatus:
            print('%s at %s' % (
                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

    snmpEngine.transportDispatcher.closeDispatcher()


loop = asyncio.get_event_loop()
loop.run_until_complete(
    run([ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr'))])
)

Download script.

See also: library reference.