I've added a new D-Link DIR-890L wireless router in my office, and used the instructions I found here (http://www.dslreports.com/faq/17804) to put the AT&T 3801HGV Residential Gateway into bridge mode DMZ+ with the 890. Everything works well.
I can still reach the RG on it's original IP address from my PC, which is now hardwired to my 890.
However, the setup as used put my 890 on its own LAN IP Address or subnet. While I have almost everything now accessing the network via the 890, both wired, and wireless, I have a home automation controller that is still plugged into the RG. Like the RG, it is also still accessible using its static IP as defined in the RG.
I would like to somehow put everything on the same subnet if possible, but attempts at doing this have not worked.
I would have configured my 890 just as the wireless AP and kept the RG as the main router, but I'd like to take advantage of the more robust 890 to control my network, as it affords me more features and control than what I get from the AT&T RG alone (ddns, for example). I'm not comfortable leaving the hard-wired automation controller sitting in no man's land between the RG and my 890's firewall, and it really can't be relocated where it can access the 890 directly.
What options are there for getting everything on a single, internal LAN? Or is there a reason why this just isn't possible. There's so much information on setting up a router-behind-router / DMZ configuration (some of it conflicting), but very little on putting everything on a single LAN.
I guess the other thing that complicates this, is that the RG can't really be put into true modem-only mode (correct?), since it still provides access to the Uverse STBs and phone lines...
Hoping someone can point me in the right direction.
Thanks in advance.
-DBB
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