[SNMP4J] v2c agent
nidhin
nidhingj at yahoo.com
Wed May 23 01:41:01 CEST 2007
Hi,
As per RFC 3416,
The GetRequest-PDU
A GetRequest-PDU is generated and transmitted at the request of an
application.
Upon receipt of a GetRequest-PDU, the receiving SNMP entity processes
each variable binding in the variable-binding list to produce a
Response-PDU. All fields of the Response-PDU have the same values as
the corresponding fields of the received request except as indicated
below. Each variable binding is processed as follows:
(1) If the variable binding's name exactly matches the name of a
variable accessible by this request, then the variable
binding's value field is set to the value of the named
variable.
(2) Otherwise, if the variable binding's name does not have an
OBJECT IDENTIFIER prefix which exactly matches the OBJECT
IDENTIFIER prefix of any (potential) variable accessible by
this request, then its value field is set to "noSuchObject".
(3) Otherwise, the variable binding's value field is set to
"noSuchInstance".
Point (2) to be noted.
Regards
Nidhin
Frank Fock <fock at agentpp.com> wrote:
Hi Nidhin,
OK, but this is the expected result, since snmpTargetAddrEntry
is a registered ManagedObject of the TestAgent.
Can you reproduce it with an OID for which no registration
exists in the path to the root OID?
Best regards,
Frank
nidhin wrote:
> Hi Frank,
>
> I used the snmp4j-agent-1.1.2.zip code to reproduce this issue.
>
> OID which i gave is 1.3.6.1.6.3.12.1.2.1.10
>
> Response from the test agent is
>
> ***** SNMP PROMPT FOR OID-RESPONSE START *****
> 1: snmpTargetAddrEntry.10 (nosuchinstance) no such instance
> ***** SNMP PROMPT FOR OID-RESPONSE END *****
>
> Regards
> Nidhin
>
>
> */Frank Fock /* wrote:
>
> Hi Nidhin,
>
> When I run a GET request with that OID on the TestAgent
> noSuchObject is returned. Can you provide an OID that
> reproduces the problem with the TestAgent?
>
> Thanks in advance,
> Frank
>
> nidhin wrote:
> > Hi Frank,
> >
> > Yes, the tested OID is indeed outside of any registered
> ManagedObject.
> >
> > Regards
> > Nidhin
> >
> > */Frank Fock /* wrote:
> >
> > Hi Nidhin,
> >
> > The question is whether the tested OID is indeed outside
> > of any registered ManagedObject of the agent or not?
> >
> > Best regards,
> > Frank
> >
> > nidhin wrote:
> > > Hi Frank,
> > >
> > > Following is the description of the test case.
> > >
> > > Description:
> > > # This test checks the agents ability to process SNMP Get/Getnext
> > > requests
> > > # for non existent MIB variables. A get, getnext request is sent to
> > > # the agent for a MIB variable that is not part of the group or
> > table.
> > > # A SNMPv1 agent is expected to return a lexicographically larger
> > > variable
> > > # for GetNext or NO_SUCH_NAME for Get requests. A SNMPv2C agent is
> > > expected
> > > # to return a lexicographically larger variable for GetNext or
> > > noSuchObject
> > > # value for Get requests.
> > > #
> > > # Example: The system group in MIBII has 7 attributes. A request is
> > > # sent with system.8 which is one larger than the last attribute
> > > # in that group. In the case of a tableEntry with 5 columns, a
> > > # request will be sent for tableEntry.6
> > > #
> > > # Note: An SNMPv1 agent should return a NO_SUCH_NAME error (and a
> > > SNMPv2C agent
> > > # a endOfmib value) for a GetNext operation on the last variable
> > > supported.
> > > # While this may be flagged as an error, this is a valid
> > > response, if the
> > > # variable is indeed the last variable.
> > >
> > > ---------------------------------------------------------------
> > >
> > > So my agent returns me No such instance error instead of a
> > noSuchObject
> > > error if get request is sent to the agent for a MIB variable that
> > is not
> > > part of the group or table.
> > >
> > > Please reply if I have missed some point.
> > >
> > > Regards
> > > Nidhin
> > >
> > >
> > > */Frank Fock /* wrote:
> > >
> > > Hi Nidhin,
> > >
> > > Without knowing the agent's instrumentation it is hard to say
> > > whether this is an error or not. I cannot reproduce such
> > > a problem with my agent.
> > >
> > > Best regards,
> > > Frank
> > >
> > > nidhin wrote:
> > > > Hi,
> > > >
> > > > For the following test v2c agent fails to respond back with
> > > proper error message.
> > > >
> > > > I have used v1.1.2 SNMP4j agent jars
> > > >
> > > > Test case:
> > > >
> > > > process SNMP Get/Getnext requests for non existent MIB variables.
> > > >
> > > > Result:
> > > >
> > > >
> > >
> >
> ############################################################################
> > > > # Test Results: A response value contained an error type
> > > > # (NoSuchInstance) other than NoSuchObject.
> > > > # Test Rating: POOR
> > > > # Message Exchange:
> > > > #
> > > > # (Mon May 21 14:09:20 2007):
> > > > # Get Request: Version = SNMPv2c, Community = public
> > > > # Request Id = 61, Error Status = No Error , Error Index = 0
> > > > # Oid1 = 1.3.6.1.4.1.1456.20.2.38.6.1.6 , Type = NULL, Value
> = NULL
> > > > #
> > > > # (Mon May 21 14:09:20 2007):
> > > > # Response: Version = SNMPv2c, Community = public
> > > > # Request Id = 61, Error Status = No Error , Error Index = 0
> > > > # Oid1 = 1.3.6.1.4.1.1456.20.2.38.6.1.6 , Type = NoSuchInstance,
> > > Value = NULL
> > > >
> > >
> >
> ############################################################################
> > > >
> > > > Regards
> > > > Nidhin
> > > >
> > > >
> > > > ---------------------------------
> > > > You snooze, you lose. Get messages ASAP with AutoCheck
> > > > in the all-new Yahoo! Mail Beta.
> > > > _______________________________________________
> > > > 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
> > >
> > >
> > >
> >
> ------------------------------------------------------------------------
> > > Be a better Globetrotter. Get better travel answers
> > > from
> > > someone who knows.
> > > Yahoo! Answers - Check it out.
> >
> > --
> > AGENT++
> > http://www.agentpp.com
> > http://www.mibexplorer.com
> > http://www.mibdesigner.com
> >
> >
> >
> ------------------------------------------------------------------------
> > Be a better Heartthrob. Get better relationship answers
> > from
> > someone who knows.
> > Yahoo! Answers - Check it out.
>
> --
> AGENT++
> http://www.agentpp.com
> http://www.mibexplorer.com
> http://www.mibdesigner.com
>
>
> ------------------------------------------------------------------------
> Need a vacation? Get great deals to amazing places
> on
> Yahoo! Travel.
--
AGENT++
http://www.agentpp.com
http://www.mibexplorer.com
http://www.mibdesigner.com
---------------------------------
Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more.
More information about the SNMP4J
mailing list