Running the SyncManager 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 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 different Unix terminal windows running the Korn shell. In the first window, enter the following commands:

$ cd examplesDir/Snmp/Agent
$ java -classpath classpath Agent nbTraps

If you will also be running the asynchronous manager example with this agent, omit the nbTraps parameter. The agent will then send traps continuously and they can be seen in both managers. Otherwise, specify the number of traps to be sent to the manager. Wait until the manager is started to send the traps.

Now we can launch the manager application in another window 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 SyncManager localhost 8085
SyncManager::main: Send get request to SNMP agent on localhost at 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 variable on the agent.

Now press <Enter> in the agent's window: you should see the manager receiving the traps it sends. Leave the agent running if you are going on to the next example, otherwise remember to stop it by typing <Control-C>.