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 Twisted I/O framework

Functionally similar to:

   $ snmpbulkwalk -v3 -lnoAuthNoPriv -u usr-none-none -Cn0 -Cr50 demo.snmplabs.com  SNMPv2-MIB::system

   from twisted.internet.task import react
   from pysnmp.hlapi.twisted import *


   def success(args, reactor, snmpEngine):
       (errorStatus, errorIndex, varBindTable) = args

       if errorStatus:
           print('%s: %s at %s' % (hostname,
                                   errorStatus.prettyPrint(),
                                   errorIndex and varBindTable[0][int(errorIndex) - 1][0] or '?'))
       else:
           for varBindRow in varBindTable:
               for varBind in varBindRow:
                   print(' = '.join([x.prettyPrint() for x in varBind]))

           if not isEndOfMib(varBindTable[-1]):
               return getbulk(reactor, snmpEngine, *varBindTable[-1])


   def failure(errorIndication):
       print(errorIndication)


   def getbulk(reactor, snmpEngine, varBinds):
       d = bulkCmd(snmpEngine,
                   UsmUserData('usr-none-none'),
                   UdpTransportTarget(('demo.snmplabs.com', 161)),
                   ContextData(),
                   0, 50,
                   varBinds)
       d.addCallback(success, reactor, snmpEngine).addErrback(failure)
       return d


   react(getbulk, [SnmpEngine(), ObjectType(ObjectIdentity('SNMPv2-MIB', 'system'))])

"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

* based on Twisted I/O framework

Functionally similar to:

   $ snmpwalk -v3 -lauthPriv -u usr-md5-none -A authkey1 -X privkey1 demo.snmplabs.com  IF-MIB::

   from twisted.internet.task import react
   from pysnmp.hlapi.twisted import *


   def success(args, reactor, snmpEngine):
       (errorStatus, errorIndex, varBindTable) = args

       if errorStatus:
           print('%s: %s at %s' % (hostname,
                                   errorStatus.prettyPrint(),
                                   errorIndex and varBindTable[0][int(errorIndex) - 1][0] or '?'))
       else:
           for varBindRow in varBindTable:
               for varBind in varBindRow:
                   print(' = '.join([x.prettyPrint() for x in varBind]))

           if not isEndOfMib(varBindTable[-1]):
               return getnext(reactor, snmpEngine, *varBindTable[-1])


   def failure(errorIndication):
       print(errorIndication)


   def getnext(reactor, snmpEngine, varBinds):
       d = nextCmd(snmpEngine,
                   UsmUserData('usr-md5-none', 'authkey1'),
                   UdpTransportTarget(('demo.snmplabs.com', 161)),
                   ContextData(),
                   varBinds)
       d.addCallback(success, reactor, snmpEngine).addErrback(failure)
       return d


   react(getnext, [SnmpEngine(), ObjectType(ObjectIdentity('SNMPv2-MIB', 'system'))])

"Download" script.

See also: library reference.
