MIB tweaks¶
Enable MIB lookup¶
Perform SNMP GETNEXT operation with the following options:
- with SNMPv2c, community ‘public’
- over IPv4/UDP
- to an Agent at demo.snmplabs.com:161
- for an OID in string form
- resolve request and response OIDs and values from/to human-friendly form
The lookupMib=True keyword argument makes pysnmp resolving request and response variable-bindings from/to human-friendly form.
Functionally similar to:
$ snmpwalk -v2c -c public -ObentU demo.snmplabs.com 1.3.6.1.2.1
from pysnmp.hlapi.v1arch import *
iterator = nextCmd(
SnmpDispatcher(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ObjectType(ObjectIdentity('1.3.6.1.2.1.1')),
lookupMib=True
)
for errorIndication, errorStatus, errorIndex, varBinds in iterator:
if errorIndication:
print(errorIndication)
break
elif 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]))
Download
script.
Preload PySNMP MIBs¶
Send a series of SNMP GETNEXT requests using the following options:
- with SNMPv2c, community name “public”
- over IPv4/UDP
- to an Agent at demo.snmplabs.com:161
- for all OIDs starting from 1.3.6
- with MIB lookup enabled
- preload all Python MIB modules found in search path
Functionally similar to:
$ snmpwalk -v2c -c public -m ALL demo.snmplabs.com:161 1.3.6
from pysnmp.hlapi.v1arch import *
iterator = nextCmd(
SnmpDispatcher(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ObjectType(ObjectIdentity('1.3.6').loadMibs()),
lookupMib=True
)
for errorIndication, errorStatus, errorIndex, varBinds in iterator:
if errorIndication:
print(errorIndication)
break
elif 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]))
Download
script.
Custom ASN.1 MIB path¶
Send SNMP GET request using the following options:
- with SNMPv2c, community ‘public’
- over IPv4/UDP
- to an Agent at demo.snmplabs.com:161
- for IF-MIB::ifInOctets.1 MIB object
- pass non-default ASN.1 MIB source to MIB compiler
- with MIB lookup enabled
Functionally similar to:
$ snmpget -v2c -c public -M /usr/share/snmp demo.snmplabs.com IF-MIB::ifInOctets.1
from pysnmp.hlapi.v1arch import *
iterator = getCmd(
SnmpDispatcher(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ObjectType(ObjectIdentity('IF-MIB', 'ifInOctets', 1).addAsn1MibSource(
'file:///usr/share/snmp',
'http://mibs.snmplabs.com/asn1/@mib@')
),
lookupMib=True
)
errorIndication, errorStatus, errorIndex, varBinds = next(iterator)
if errorIndication:
print(errorIndication)
elif errorStatus:
print('%s at %s' % (errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
else:
for varBind in varBinds:
print(' = '.join([x.prettyPrint() for x in varBind]))
Download
script.
Custom PySNMP MIBs location¶
Send a series of SNMP GETBULK requests using the following options:
- with SNMPv2c, community ‘public’
- over IPv4/UDP
- to an Agent at demo.snmplabs.com:161
- for all OIDs within TCP-MIB::tcpConnTable column
- TCP-MIB Python module will be searched by a user-specified filesystem path (/opt/mib/pysnmp) and in Python package (python_packaged_mibs) which should be in sys.path. If not found, TCP-MIB will be downloaded from the web, compiled into Python and cached for further use.
- with MIB lookup enabled
Functionally similar to:
$ snmpbulkwalk -v2c -c public -Cn0 -Cr50 demo.snmplabs.com TCP-MIB::tcpConnTable
from pysnmp.hlapi.v1arch import *
iterator = bulkCmd(
SnmpDispatcher(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
0, 50,
ObjectType(
ObjectIdentity('TCP-MIB', 'tcpConnTable').addMibSource(
'/opt/mibs/pysnmp').addMibSource(
'python_packaged_mibs')
).addAsn1MibSource('http://mibs.snmplabs.com/asn1/@mib@'),
lookupMib=True,
lexicographicMode=False
)
for errorIndication, errorStatus, errorIndex, varBinds in iterator:
if errorIndication:
print(errorIndication)
break
elif 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]))
Download
script.
See also: library reference.