[SNMP4J] Counter32 with wrong value

[Frank Fock]

Hi Phil,

The console tool uses GETNEXT by default. When
you specify "-p GET" then a GET request is
send.

Best regards,
Frank

Owen, Philip wrote:
> Hi Frank,
> 
> I have got to the bottom of this. I had used pdu.setType(PDU.GETNEXT)
> rather than pdu.setType(PDU.GET), and was hence getting the next record.
> Understandable really :-)
> 
> I presume that the console tool must have a similar bug, but you are in
> a far better position than I to determine if that really is the case.
> 
> Thanks again for looking at this.
> 
> Phil.
> 
> Owen, Philip wrote:
>> Hi Frank,
>>
>> Thanks for the response.
>>
>> I thought I was going mad there. However, it seems that the 
>> value is correct, but the wrong table row is being returned. 
>> The request is for 363251293, but the response is from 
>> 363251294. I had not noticed that before, only when you 
>> mentioned it based on the output below.
>>
>> If I use snmpget for 363251294 I get the same value as 
>> SNMP4J.exe returns when asked for 363251293.
>>
>> Thanks,
>>
>> Phil. 
>>
>> Frank Fock wrote:
>>> Hi,
>>>
>>> you get different results, because you request different objects.
>>>
>>> Best regards,
>>> Frank
>>>
>>> Owen, Philip wrote:
>>>> Hi,
>>>>  
>>>> I am trying to retrieve a Coutner32 value using an SNMP get with 
>>>> SNMP4J, but am getting the wrong value. Whether I use the
>>> code I wrote
>>>> (based on the examples in the documentation), or using the SNMP4J 
>>>> executable I still get the same result.
>>>>  
>>>> The snmpget command and the Net::SNMP Perl library both
>>> agree on what
>>>> the value should be, although if memory serves, they both
>>> use the same
>>>> back-end libraries.
>>>>  
>>>> SNMP4J:
>>>> C:\snmp4j\tool>SNMP4J.exe -c public -v 2c router
>>>> 1.3.6.1.4.1.4874.2.2.35.1.4.3.1.1.2.363251293
>>>> 19-Jun-2007 10:17:52 org.snmp4j.log.JavaLogAdapter log
>>>> INFO: UDP receive buffer size for socket 192.168.4.135/0 
>> is set to: 
>>>> 8192 Received response after 94 millis Response received with 
>>>> requestID=500261284, errorIndex=0,
>>>> errorStatus=Success(0)
>>>>  
>>>> 1.3.6.1.4.1.4874.2.2.35.1.4.3.1.1.2.363251294 = 6746487
>>>>  
>>>> snmpget:
>>>> [user at hostname ~]$ snmpget -c public -v 2c -On router
>>>> 1.3.6.1.4.1.4874.2.2.35.1.4.3.1.1.2.363251293
>>>> .1.3.6.1.4.1.4874.2.2.35.1.4.3.1.1.2.363251293 = Counter32: 
>>> 473269566
>>>>  
>>>> I can see no reason why these values are so different. The OID in 
>>>> question is row index 363251293 of a table (no, they don't
>>> start at 1
>>>> :-) ) if that matters.
>>>>  
>>>> It does not seem to affect all entries on this table, 
>> most of them 
>>>> come through okay, but this is the biggest value I have 
>> seen so far.
>>>> I tried getting SNMP4J.exe to retrieve using getTable() but
>>> cannot get
>>>> it to return the right row index. I know that is a separate
>>> issue, but
>>>> thought it might help to see what value it obtained that
>>> way. Maybe I
>>>> am just not specifying the lower and upper bounds properly.
>>>>  
>>>> Thanks,
>>>>  
>>>> Philip.
>>>>
>>>>
>>>> For more information about the Viatel Group, please visit 
>>>> www.viatel.com
>>>>
>>>> VTL (UK) Limited Registered in England and Wales Registered
>>> Address: 
>>>> Inbucon House, Wick Road, Egham, Surrey TW20 0HR Company
>>> Registration
>>>> No: 04287100 VAT Registration Number: 781 4991 88
>>>>
>>>> THIS MESSAGE IS INTENDED ONLY FOR THE USE OF THE INTENDED
>>> RECIPIENT TO WHICH IT IS ADDRESSED AND MAY CONTAIN 
>> INFORMATION THAT IS 
>>> PRIVILEGED, CONFIDENTIAL AND EXEMPT FROM DISCLOSURE.  If 
>> the reader of 
>>> this message is not the intended recipient, or an employee or agent 
>>> responsible for delivering the message to the intended 
>> recipient, you 
>>> are notified that any dissemination, distribution or 
>> copying of this 
>>> e-mail is prohibited, and you should delete this e-mail from your 
>>> system.
>>>> This message has been scanned for viruses and spam by Viatel 
>>>> MailControl - www.viatel.com 
>>>> _______________________________________________
>>>> SNMP4J mailing list
>>>> SNMP4J at agentpp.org
>>>> http://lists.agentpp.org/mailman/listinfo/snmp4j
>>> --
>>> AGENT++
>>> http://www.agentpp.com
>>> http://www.mibexplorer.com
>>> http://www.mibdesigner.com
>>>
>>>

-- 
AGENT++
http://www.agentpp.com
http://www.mibexplorer.com
http://www.mibdesigner.com