You configure both configure your servers to exchange messages and then... they exchange messages :)
It's good practice to have a couple peers, in case one goes offline or doesn't carry the groups you're interested in -- or filters things you might want. I run NoCeM on-spool and have stricter-than-normal CleanFeed rules, which translated from Usenet admin speak means my server drops a lot of spam and garbage posts, and if you want those you'll have to get them from another peer.
You configure both configure your servers to exchange messages and then... they exchange messages :)
It's good practice to have a couple peers, in case one goes offline or doesn't carry the groups you're interested in -- or filters things you might want. I run NoCeM on-spool and have stricter-than-normal CleanFeed rules, which translated from Usenet admin speak means my server drops a lot of spam and garbage posts, and if you want those you'll have to get them from another peer.