[SNMP4J] No response from remote agent on GET

[Chris]

Figured it out.

Even though I did use the listen() method to my TransportMethod instance,
it didn't seem to work until after I created my Snmp instance.  So, I
moved the method call and I received the datagram back from the agent.

Snmp snmp = new Snmp(transport);
try {
    transport.listen();
} catch .....
}


On Tue, 3 Apr 2007, Chris wrote:

> I'm trying to perform a simple SNMP get operation against a OID.
> According to a packet trace, the following code sends out a packet, but
> there is no received from the agent.  Manual attempts to grab the same
> data from the snmpget command do return a valid result.
>
> Any ideas what I'm doing wrong?
>
> import org.snmp4j.*;
> import org.snmp4j.smi.*;
> import org.snmp4j.transport.*;
> import org.snmp4j.mp.*;
> import org.snmp4j.event.*;
>
>
> public class SnmpTest1 {
>         public static void main(String[] args) {
>         Address targetAddress =
> GenericAddress.parse("udp:10.0.0.209/161");
>         TransportMapping transport = null;
>         try {
>                 transport = new DefaultUdpTransportMapping();
>                 transport.listen();
>         } catch (Exception e) {
>                 System.err.println("Transport Failure");
>         }
>         Snmp snmp = new Snmp(transport);
>         CommunityTarget target = new CommunityTarget();
>         target.setCommunity(new OctetString("public"));
>         target.setAddress(targetAddress);
>         target.setRetries(1);
>         target.setTimeout(5000);
>         target.setVersion(SnmpConstants.version2c);
>         PDU pdu = new PDU();
>         pdu.setType(org.snmp4j.PDU.GET);
>         pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.1.5.0")));
>         ResponseEvent response = null;
>         try {
>                 response = snmp.send(pdu,target);
>         } catch (Exception e) {
>                 System.err.println("Send failure!");
>         }
>         PDU respPdu = response.getResponse();
>         if (respPdu == null) {
>                 System.out.println("No object returned");
>         }
>         }
> }
>
>
>
> --------------------
> Christopher Josephes
> cpj1 at visi.com
> _______________________________________________
> SNMP4J mailing list
> SNMP4J at agentpp.org
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>

--------------------
Christopher Josephes
cpj1 at visi.com