Very interesting. The problem has been discussed before, in threads such as 722k always appears offline? and Sling box drops connection but this is the first real insight as to a cause. I am going to look at the advanced settings on my router and see if there is any way to enable trailers or somthing related.wje said:Amazing how seeing something in a different format suddenly shows something you haven't noticed - note the request packet size. The one that works is 42 bytes, the 722 sends a 60 byte packet. Looking at arp requests on my network for a while, every other device sends a 42 byte packet, and they all work. Looks like the 722 sticks a trailer on the packet, and no one will answer it. OTOH, from what I can find out about arp packet sizes, 60 is a possible size. So, I'm still not any closer to a solution.
My conclusion - for whatever reason, arp is broken on the 722, which, combined with all its other problems, makes it a candidate for the 'most useless dvr' award. I want my 622 back.