Running the SimpleManager Example

In the examplesDir/Snmp/Manager directory, we first need to generate the OID table description of MIB-II that our manager will access. Then we compile the example classes. To set up your environment, see "Directories and Classpath" in the preface.

$ mibgen -mo -d . mib_II.txt
[output omitted]
$ javac -classpath classpath -d . *.java

Make sure that no other agent is running on port 8085, and launch the simple SNMP agent in examplesDir/Snmp/Agent. See "MIB Development Process" if you have not already built and run this example.

Here we give commands for launching the applications from the same terminal window running the Korn shell. On the Windows NT platform, you will have to launch each application in a separate window. We redirect the output messages since this agent sends traps periodically.

$ cd examplesDir/Snmp/Agent
$ java -classpath classpath Agent > Agent.out &

Now we can launch the manager application to connect to this agent. If you wish to run the manager on a different host, replace localhost with the name of the machine where you launched the agent.

$ cd examplesDir/Snmp/Manager
$ java -classpath classpath SimpleManager localhost 8085
SimpleManager::main: Send get request to SNMP agent on localhost port 8085
Result: 
[Object ID : 1.3.6.1.2.1.1.1.0  (Syntax : String)
Value : SunOS sparc 5.7]

Here we see the output of the SNMP request, it is the value of the sysDescr on the agent.

Leave the agent running if you are going on to the next example, otherwise remember to stop it with the following commands:

$ fg
java [...] Agent > agent.out <Control-C>
^C$ rm examplesDir/Snmp/Agent/agent.out