How to register a listener on a OID / Managed Object using SNMP4J to act on set or get requests the agent receives?

Content Index :

How to register a listener on a OID / Managed Object using SNMP4J to act on set or get requests the agent receives?
Creating master agent and sub agent using snmp4j-agentx
Using agent name instead of IP as Address in SNMP4J
SNMP4J: Which SNMP4J Jar should be used to write a SNMP agent?
DuplicateRegistrationException in SNMP4j Agent
How to test SNMP4J agent

How to register a listener on a OID / Managed Object using SNMP4J to act on set or get requests the agent receives?

Tag : java , By : KingGuppy

Date : December 01 2020, 04:45 PM

I think the issue was by ths following , I found it. I was looking at the wrong place. I thought a had to add a listener to the agent, but instead i have to add the listener to the server.

server.addLookupListener(new MOServerLookupListener() {
    @Override
    public void lookupEvent(MOServerLookupEvent event) {
        System.out.println();
        ((MOScalar)event.getLookupResult()).setValue(new OctetString(new Date().toString()));
    }
    @Override
    public void queryEvent(MOServerLookupEvent event) {
        System.out.println();
    }
},moScalar);

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How to register a listener on a OID / Managed Object using SNMP4J to act on set or get requests the agent receives , SNMP4J: Which SNMP4J Jar should be used to write a SNMP agent , Creating master agent and sub agent using snmp4j-agentx , How to test SNMP4J agent , what is the term used for the variable tha ,

Creating master agent and sub agent using snmp4j-agentx

Tag : development , By : Reiner

Date : March 29 2020, 07:55 AM

help you fix your problem Adding your own MIB objects (so called ManagedObjects) to your SNMP agent with SNMP4J-AgentX works in the same way as for SNMP4J-Agent. The only exception from this are AgentX shared tables, but these are advanced concepts you generally do not need when you start using AgentX/SNMP.
Thus, I recommend reading the SNMP4J-Agent-Instrumentation-Guide.pdf to learn how MIB objects are registered and instrumentated based on your requirements.

Using agent name instead of IP as Address in SNMP4J

Tag : development , By : Puneet Madaan

Date : March 29 2020, 07:55 AM

This might help you You can get the IP address by using DNS resolution, like this answer says:

InetAddress address = InetAddress.getByName(switchName); 
System.out.println(address.getHostAddress());

SNMP4J: Which SNMP4J Jar should be used to write a SNMP agent?

Tag : development , By : kokok13

Date : March 29 2020, 07:55 AM

this will help An agent is some kind of server: it mainly replies to requests (it may occasionally also send traps to managers).
A manager is a some kind of client: it mainly send requests to agents (it may occasionally also receive traps from managers).

DuplicateRegistrationException in SNMP4j Agent

Tag : development , By : Richard

Date : March 29 2020, 07:55 AM

it helps some times For those that follow in my path, the key here is to add a .0 to the end of each of the addresses.
This extra zero identifies the variable at that OID and means the addresses don't conflict with one another. Without it, it's just a path to a location without creating a place for the variable itself.

registerManagedObject(new MOScalar(new OID("1.3.6.1.4.1.32437.1.5.1.4.2.0"), MOAccessImpl.ACCESS_READ_ONLY, new OctetString("object 1")));
registerManagedObject(new MOScalar(new OID("1.3.6.1.4.1.32437.1.5.1.2.20.0"), MOAccessImpl.ACCESS_READ_ONLY, new OctetString("object 2")));
registerManagedObject(new MOScalar(new OID("1.3.6.1.4.1.32437.1.5.1.2.23.0"), MOAccessImpl.ACCESS_READ_ONLY, new OctetString("object 3")));
registerManagedObject(new MOScalar(new OID("1.3.6.1.4.1.32437.1.5.1.1.21.0"), MOAccessImpl.ACCESS_READ_ONLY, new OctetString("object 4")));
registerManagedObject(new MOScalar(new OID("1.3.6.1.4.1.32437.1.5.1.4.2.1.2.0"), MOAccessImpl.ACCESS_READ_ONLY, new OctetString("object 5")));