Various SNMP versions

SNMPv2c

Send SNMP GET request using the following options:

  • with SNMPv1, community ‘public’
  • over IPv4/UDP
  • to an Agent at demo.snmplabs.com:161
  • for two instances of SNMPv2-MIB::sysDescr.0 MIB object,

Functionally similar to:

$ snmpget -v2c -c public demo.snmplabs.com SNMPv2-MIB::sysDescr.0
from pysnmp.hlapi.asyncore import *


# noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
def cbFun(snmpEngine, sendRequestHandle, errorIndication,
          errorStatus, errorIndex, varBinds, cbCtx):
    if errorIndication:
        print(errorIndication)
        return
    elif errorStatus:
        print('%s at %s' % (errorStatus.prettyPrint(),
                            errorIndex and varBindTable[-1][int(errorIndex) - 1][0] or '?'))
        return
    else:
        for varBind in varBinds:
            print(' = '.join([x.prettyPrint() for x in varBind]))


snmpEngine = SnmpEngine()

getCmd(snmpEngine,
       CommunityData('public'),
       UdpTransportTarget(('demo.snmplabs.com', 161)),
       ContextData(),
       ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)),
       cbFun=cbFun)

snmpEngine.transportDispatcher.runDispatcher()

Download script.

Walk whole MIB

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

  • with SNMPv3, user ‘usr-md5-none’, MD5 authentication, no privacy
  • over IPv4/UDP
  • to an Agent at demo.snmplabs.com:161
  • for all OIDs in IF-MIB

Functionally similar to:

$ snmpwalk -v3 -lauthNoPriv -u usr-md5-none -A authkey1 -X privkey1
demo.snmplabs.com IF-MIB::
from pysnmp.hlapi.asyncore import *


# noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
def cbFun(snmpEngine, sendRequestHandle, errorIndication,
          errorStatus, errorIndex, varBindTable, cbCtx):
    if errorIndication:
        print(errorIndication)
        return
    elif errorStatus:
        print('%s at %s' % (errorStatus.prettyPrint(),
                            errorIndex and varBindTable[-1][int(errorIndex) - 1][0] or '?'))
        return
    else:
        for varBindRow in varBindTable:
            for varBind in varBindRow:
                print(' = '.join([x.prettyPrint() for x in varBind]))

    return True  # request lower layers to do GETNEXT and call us back


snmpEngine = SnmpEngine()

nextCmd(snmpEngine,
        UsmUserData('usr-md5-none', 'authkey1'),
        UdpTransportTarget(('demo.snmplabs.com', 161)),
        ContextData(),
        ObjectType(ObjectIdentity('SNMPv2-MIB', 'system')),
        ObjectType(ObjectIdentity('IF-MIB', 'ifTable')),
        cbFun=cbFun)

snmpEngine.transportDispatcher.runDispatcher()

Download script.

See also: library reference.