Python SNMP with PYSNMP F5 ltm

Question

I'am new in this thing,

When I run the following command:

snmpwalk -v2c -c public localhost .1.3.6.1.4.1.3375.2.2.5.6.2.1.6

in my F5 LTM I get all my nodes, pools and state like this:

F5-BIGIP-LOCAL-MIB::ltmPoolMbrStatusEnabledState."/Common/pool-cnv-proc-financeiro-processamento-was-9169"."/Common/HAPP102".9169 = INTEGER: enabled(1)

But when I use the same OID by pysnmp I get this:

[ObjectType(ObjectIdentity(<ObjectName value object at 0x6373150 tagSet <TagSet object at 0x4ab5190 tags 0:0:6> payload [1.3.6.1.4.1.3375...80.49.48.52.9144]>), <Integer value object at 0x6373050 subtypeSpec <ConstraintsIntersection object at 0x4ab5c90 consts <ValueRangeConstraint object at 0x4a17c90 consts -2147483648, 2147483647>> tagSet <TagSet object at 0x4aabad0 tags 0:0:2> payload [1]>)]

My question:

Is there a way to parse this pysnmp response or am I doing something wrong?

Here is the python code:

from pysnmp.hlapi import *


def walk(host, oid):
    for (errorIndication, errorStatus, errorIndex, varBinds) in nextCmd(SnmpEngine(),
                                                                        CommunityData('public'),
                                                                        UdpTransportTarget((host, 161)),
                                                                        ContextData(),
                                                                        ObjectType(ObjectIdentity(oid)),
                                                                        lexicographicMode=False):
        if errorIndication:
            break
        elif errorStatus:
            break

        else:

            for varBind in varBinds:
                print(varBind)


walk('10.10.100.89', '1.3.6.1.4.1.3375.2.2.5.6.2.1.6')

Answer 1

You just need to .prettyPrint() the pysnmp objects you get in response:

for varBind in varBinds:
    print(' = '.join([x.prettyPrint() for x in varBind]))

Like shown in the examples.

EDIT:

If you want the response variable-bindings to be resolved against a MIB, you need to load that MIB (perhaps, F5-BIGIP-LOCAL-MIB) into pysnmp like this:

...
ContextData(),
ObjectType(ObjectIdentity(oid)).loadMibs('F5-BIGIP-LOCAL-MIB'),
...

Alternatively, if you specify MIB symbols in request (as opposed to specifying OIDs), pysnmp will load up the named MIB automatically.

...
ContextData(),
ObjectType(ObjectIdentity('F5-BIGIP-LOCAL-MIB', 'ltmPoolMbrStatusEnabledState')),
...