PySNMP No Response Received Before Timeout--Even with Documentation Examples - timeout

Question

I have installed PySNMP (version 4.4.6) and am attempting to call the following function (part of a larger class):
def walk(self):
#Walks OID to scavenge for information.
oids={}
for (errorIndication,
errorStatus,
errorIndex,
varBinds) in nextCmd(SnmpEngine(),
CommunityData(self.cs),
UdpTransportTarget((self.device.split(".")[0], 161), timeout=60, retries=0),
ContextData(),
ObjectType(ObjectIdentity("1.3.6.1.4.1.14179.1.2.5.5"))):
print((errorIndication,
errorStatus,
errorIndex,
varBinds))
and repeatedly receive the following output:
(RequestTimedOut('No SNMP response received before timeout',),
I have triple-checked to make sure that my community string, SNMP version, device name, port, and OID are correct. I have altered the Transport timeout variable 60 seconds with no luck. My first thought was that it might be a firewall issue, but then I tried to run the simple example included in the documentation:
from pysnmp.hlapi import *
g = getCmd(SnmpEngine(),
CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
ContextData(),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)))
print(next(g))
And receive the exact same output. Does anyone know what might be causing this? Unfortunately I'm on a server with few admin rights, so I can't go digging through module files changing anything. Thanks in advance for the help!

Answer 1

Your code looks good. For as long as you get the right hostname/IP out of self.device.split(".")[0].
May be you are not getting response from your SNMP agent for one reason or the other. I'd try public SNMP agent:
$ snmpwalk -v2c -c public demo.snmplabs.com 1.3.6
SNMPv2-MIB::sysDescr.0 = STRING: Linux zeus 4.8.6.5-smp #2 SMP Sun Nov 13 14:58:11 CDT 2016 i686
...
To make sure you do not have connectivity/firewall problems. Consider trying snmpwalk against your local SNMP agent as well. If you can't have Net-SNMP installed, consider trying snmpclitools for conducting this experiment.