Hello,
You need to configure the USM indeed.
See http://www.snmp4j.org/doc/org/snmp4j/Snmp.html
for an example. The error code you get is described here:
http://www.snmp4j.org/doc/org/snmp4j/mp/SnmpConstants.html
Best regards,
Frank
Oosten, Harry van schrieb:
Hello,
As a requirement for an application I need to build in option to request
some OID from switches and/or a APC.
I have tried to create a testclass based on the examples given in the
API.
I think I don't get the whole idea to make things work. I want to know
what I need to create this functionality:
- SNMPv3
- Polling Switches and/or APC
- Acting on value from the response
I've tried to create an UserTarget and ScopedPDU
private ScopedPDU createScopedPdu() {
ScopedPDU pdu = new ScopedPDU();
pdu.add(new VariableBinding(new OID(".1.3.1.2.6.1.2.1.1.2")));
pdu.setType(PDU.GETBULK);
pdu.setMaxRepetitions(50);
pdu.setNonRepeaters(1);
pdu.setContextEngineID(OctetString.fromHexString("80:00:13:70:c0:a8:01:0
d"));
return pdu;
}
private UserTarget createUserTarget() {
UserTarget target = new UserTarget();
target.setAddress(new UdpAddress("127.0.0.1/161"));
target.setRetries(1);
target.setTimeout(500);
target.setVersion(SnmpConstants.version3);
target.setSecurityLevel(SecurityLevel.AUTH_PRIV);
target.setSecurityName(new OctetString("MD5DES"));
return target;
}
With these to tried to send the message:
private void sendMessage(ScopedPDU requestPDU, UserTarget target) throws
IOException {
Snmp snmp = null;
try {
snmp = new Snmp(new DefaultUdpTransportMapping());
snmp.listen();
} catch (IOException ex) {
Logger.getLogger(MySnmpTest.class.getName()).log(Level.SEVERE, null,
ex);
}
ResponseEvent response = snmp.send(requestPDU, target);
if (response.getResponse() == null) {
// request timed out
} else {
System.out.println("Received response from: " +
response.getPeerAddress());
// dump response PDU
System.out.println(response.getResponse().toString());
}
}
There are a few things I don't understand first off all get an
stacktrace:
Exception in thread "main" org.snmp4j.MessageException: Message
processing model 3 returned error: -1402
at
org.snmp4j.MessageDispatcherImpl.sendPdu(MessageDispatcherImpl.java:458)
at org.snmp4j.Snmp.sendMessage(Snmp.java:951)
at org.snmp4j.Snmp.send(Snmp.java:808)
at org.snmp4j.Snmp.send(Snmp.java:760)
at test.MySnmpTest.sendMessage(MySnmpTest.java:87)
at test.MySnmpTest.go(MySnmpTest.java:48)
at test.MySnmpTest.main(MySnmpTest.java:42)
Second of all where do I need to configure my username and password for
the connection?
Thanks in advance. Any help would be welcome.
Met vriendelijke groet / Kind Regards,
ing. Harry van Oosten
Software engineer
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