Well, of course i don't get to see the unicast so I can't see if they're actually talking to each other. I see a bunch of broadcast/multicast from all 3 boxes though: All 3 of them broadcast Discovery beacons at 60s intervals (on x.x.x.255, udp port 2190) There's some IGMPv3 traffic from the mini right after it boots (18.104.22.168), it joins and leaves 22.214.171.124 a few times. A lot of mDNS traffic from all 3 boxes on 126.96.36.199 udp port 5353. I gather this is Bonjour. The intervals between queries seem to be longish (up to several minutes) and there's no obvious pattern. Actually selecting anything from the menu on the mini does not appear to provoke any network traffic, even if I pick "I don't see my DVR" and "Try Again". If I use left arrow to go back and change the name I see a flurry of activity but it looks like it's just doing some queries for the new name followed by a bunch of responses announcing the new and old names. Maybe I'll go see if I have an old hub or managed switch lying around so I can sniff the unicast as well.