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#
# GETNEXT Command Generator Application
#
# Perform SNMP GETNEXT operation with the following options:
#
# with SNMPv1, community 'public'
# over IPv4/UDP
# to an Agent at demo.snmplabs.com:161
# two columns of the IF-MIB::ifEntry table
# search for pysnmp MIBs at specific filesystem location
# stop when response OIDs leave the scopes of initial OIDs
#
# This script performs similar to the following Net-SNMP command:
#
# $ snmpwalk -v1 -c public -ObentU demo.snmplabs.com IF-MIB::ifDescr IF-MIB::ifType
#
# The pysnmp engine maintains its own MIB search path which is usued
# for searching for MIB modules by name. By default pysnmp will search
# its built-in MIB repository (pysnmp.smi.mibs.instances, pysnmp.smi.mibs)
# and pysnmp-mibs package (pysnmp_mibs). Those two entries are normally
# found relative to $PYTHONPATH. Besides searching MIBs as Python modules
# (which could be egg-ed or not), pysnmp can also search for stand-alone
# files in given directories. The latter could be specified by
# ObjectIdentity.addMibSource() calls. New search path entries are added
# in front of existing ones in search path.
#
from pysnmp.entity.rfc3413.oneliner.cmdgen import *
for errorIndication, \
errorStatus, errorIndex, \
varBinds in nextCmd(SnmpEngine(),
CommunityData('public', mpModel=0),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ContextData(),
ObjectType(ObjectIdentity('IF-MIB', 'ifDescr').addMibSource('/tmp/mymibs')),
ObjectType(ObjectIdentity('IF-MIB', 'ifType')),
lookupNames=True, lookupValues=True):
# Check for errors and print out results
if errorIndication:
print(errorIndication)
break
else:
if errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex)-1][0] or '?'
)
)
break
else:
for varBind in varBinds:
print(' = '.join([ x.prettyPrint() for x in varBind ]))
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