Alright, this things driving me to drink....more.....
I've got 2 MB instances running and a DG going to XLX...
I see traffic come in the 1st MB, and it goes to the 2nd MB. If I do a tcpdump on loopback I see the traffic destined for the DG service port. After that, the traffic disappears.
When I fire up DG, it does log into XLX and joins the module I want (4001/A). I haven't played with the rewrite rules yet, but I figured I should at least see the traffic headed to the XLX box on the wire even if the TG is wrong?