I'm attempting to query an SNMP variable on a Cisco routing device in Python, and struggling.
I have a snmpwalk command that works fine:
$snmpwalk -v2c -c <our_community_string> <device_ip_address> 1.3.6.1.4.1.9.9.42.1.2.10.1.1.950
SNMPv2-SMI::enterprises.9.9.42.1.2.10.1.1.950 = Gauge32: 68
Now I'm trying to do the same thing in Python using pysnmp.
I tried using something based on the examples here - http://pysnmp.sourceforge.net/examples/current/index.html - but got an SmiError:
In [1]: from pysnmp.entity.rfc3413.oneliner import cmdgen
In [2]: cmdGen = cmdgen.CommandGenerator()
In [3]: errorIndication, errorStatus, errorIndex, varBinds = cmdGen.getCmd(
...: cmdgen.CommunityData('0pe3aro'),
...: cmdgen.UdpTransportTarget(('10.65.113.28', 161)),
...: cmdgen.MibVariable('1.3.6.1.4.1.9.9.42.1.2.10.1.1.950', 0)
...: )
But I get the following:
SmiError: MIB file "1.3.6.1.4.1.9.9.42.1.2.10.1.1.950.py[co]" not found in search path
Basically - I wanted the equavilent of this in NetSNMP, but in PySNMP (http://ben.akrin.com/?p=1234).
Does anybody know a simple way to query a numerical OID in PySNMP?
Cheers, Victor
Answer
I believe the following code would work for you:
from pysnmp.entity.rfc3413.oneliner import cmdgen
cmdGen = cmdgen.CommandGenerator()
errorIndication, errorStatus, errorIndex, varBinds = cmdGen.getCmd(
cmdgen.CommunityData('public'),
cmdgen.UdpTransportTarget(('demo.snmplabs.com', 161)),
'1.3.6.1.2.1.1.3.0'
)
print('\n'.join([ '%s = %s' % varBind for varBind in varBinds]))
You could cut&paste it into your Python prompt to try and experiment with it.
The MibVariable object can be used for referring to a MIB symbol by name.