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85654127

I want to use snmp4j to communicate with the device. Is it necessary to know the version of snmp, and how to get oid and oid?
           String ip = "192.168.100.1";
           Address targetAddress = GenericAddress.parse ("udp:" + ip + "/ 161");
            log.debug ("ip" + ip);
            TransportMapping transport;
            transport = new DefaultUdpTransportMapping ();
            Snmp snmp = new Snmp (transport);
            transport.listen ();
            CommunityTarget target = new CommunityTarget ();
            target.setCommunity (new OctetString ("public"));
            target.setAddress (targetAddress);
            target.setRetries (2);
            target.setTimeout (1000);
            target.setVersion (SnmpConstants.version1);
            // creating PDU
            PDU pdu = new PDU ();

            String oidPrefix = "1.3.6.1.2.1.1.1";
            pdu.add (new VariableBinding (new OID (oidPrefix)));
            pdu.setType (PDU.GET);

            ResponseEvent event = snmp.send (pdu, target);
            PDU resposePDU = event.getResponse ();
     
            Vector result = resposePDU.getVariableBindings ();
            VariableBinding vb = (VariableBinding) result.get (0);
            String sID = vb.getVariable (). ToString ();
            log.debug ("sID" + sID);

This is not correct.Why is the value in result every time empty? I have given an example. Thank you.

catmay

Ha ha, never seen, help top

zhengqifeng

First, make sure that the device is open for permission for you to access, and then you need to retrieve the ID and OID according to the MIB file to compile and view the index of the corresponding index, and then test to obtain the value you want

klo777

Change 1.3.6.1.2.1.1.1 to 1.3.6.1.2.1.1.1.0 and have a try
study together