Having configured the DaV repositories and the Archiva webapp,
you now can define a sample project to verify your configuration.
Lets have a Project with "pom" packaging:
You should also use the mirror the maven 2 central from your settings.
Here is a sample settings.xml.
Now run "mvn -e -U clean deploy" and see your archiva mirror of central growing with the Maven artifacts downloaded from your proxy.
You can check the deployment by browsing the Company Snapshot repository