# 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.