Various SNMP versions¶
SNMPv1¶
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,
- based on Twisted I/O framework
Functionally similar to:
$ snmpget -v1 -c public demo.snmplabs.com SNMPv2-MIB::sysDescr.0
from twisted.internet.task import react
from pysnmp.hlapi.v3arch.twisted import *
def success(args, hostname):
errorStatus, errorIndex, varBinds = args
if errorStatus:
print('%s: %s at %s' % (hostname,
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
else:
for varBind in varBinds:
print(' = '.join([x.prettyPrint() for x in varBind]))
def failure(errorIndication, hostname):
print('%s failure: %s' % (hostname, errorIndication))
# noinspection PyUnusedLocal
def getSysDescr(reactor, hostname):
deferred = getCmd(
SnmpEngine(),
CommunityData('public', mpModel=0),
UdpTransportTarget((hostname, 161)),
ContextData(),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0))
)
deferred.addCallback(success, hostname).addErrback(failure, hostname)
return deferred
react(getSysDescr, ['demo.snmplabs.com'])
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.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.v3arch.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):
deferred = bulkCmd(
snmpEngine,
UsmUserData('usr-none-none'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ContextData(),
0, 50,
varBinds
)
deferred.addCallback(success, reactor, snmpEngine).addErrback(failure)
return deferred
react(getbulk, [SnmpEngine(), ObjectType(ObjectIdentity('SNMPv2-MIB', 'system'))])
Download
script.
See also: library reference.