[pysnmp-users] unknownEngineID error

[Paulo F. A. <pf...@me...>]

Hi,
I'm using pysnmp v4 to interact with a network device using SNMPv3.
I can successfully make queries using the snmp command. However  
following the examples available in the Documentation I get the  
following error: unknownEngineID

Here is the relevant code:

errorIndication, errorStatus, errorIndex, varBindTable =  
cmdgen.CommandGenerator().nextCmd(
			cmdgen.UsmUserData('user', 'xxxx',  
'xxxx',cmdgen.usmHMACSHAAuthProtocol, cmdgen.usmDESPrivProtocol),
			cmdgen.UdpTransportTarget(('192.168.2.1',161)),
			(1,3,6,1,2,1,1)
		)
		
		print errorStatus
		print errorIndication
				
		for varBindTableRow in varBindTable:
			print varBindTableRow

And the output is:
0
unknownEngineID

If I do the same query using the snmpwalk command it behaves as  
expected.
(snmpwalk -v3 -l authPriv -u user -x DES -a SHA -A xxxx -X xxxx   
192.168.2.1 1.3.6.1.2.1.1)

So.. anybody can explain me what that error is?

Thank you for your time,
Paulo F. Andrade 52439@IST
mailto: pf...@me...