I have 3 Tivo's plus a Mini as follows: Kitchen - Premiere with external MOCA device Living Room - Premiere with external MOCA device Bedroom - Premiere XL4 with internal MOCA Laundry Room - Mini Everything has worked fine for several years. I've made no changes, but a month or so ago, one or more of the boxes started temporarily dropping off of the network. For example, I can be on the Living Room box watching something via Multi-Room Viewing (MRV) on the Bedroom box and suddenly I get an 'unable to reach' error. Sometimes I can connect right back and continue, sometimes I continue to get errors. I can try to connect to another other Tivo on the network (for my example here, the Kitchen box) and it works fine. This happens intermittently on all boxes. I've tried forcing a Tivo network connect/download on all both boxes, restarting all Tivos, restarting my Comcast router and sometimes something I did fixes it, but most times it does not. I've checked all network coax connections and they are all good. I usually just give up and watch something on the local box - then when I try MRV again later, everything works normally (until it breaks again - minutes, hours, or days later). Can anyone give me suggestions of what to look for?