Scenario
You want to force replication to all Domain Controllers, across sites, but you also want to see the actual server names, and abort if any servers are unavailable.
Solution
Run the following command:
repadmin /syncall /d /e /a
Then run this to check everything replicated ok:
repadmin /replsummary
More info can be found here: http://technet.microsoft.com/en-us/library/cc835086(v=ws.10).aspx#BKMK_examples