QUOTE(rizvanrp @ Aug 16 2010, 10:09 AM)
What method did you guys go with in the end? If you're using the BTU to handle the PPPoE, the load for NAT and connection tracking is placed on it as well as the router you plug into it. The echolife uses its switch ports as a VLAN trunk for the DIR-615 to connect to. Basically, you probably might be able to wire a custom dd-wrt router into port 1 for PPPoE and wire the DIR-615 (stock firmware) into port 2 for IPTV. However, since you're using two devices here for each VLAN.. your IPTV may take a performance hit because it no longer has traffic priority. It's also not possible to do this setup on the older Fiberhome BTUs :3
What mode is the WAN connection on your WHR-G300N set to anyway, PPPoE, dynamic IP or static IP? It would be pretty awesome if its in PPPoE mode over the standard WAN interface without tagging because that would mean pr0di9y found a way to get the BTU to work in bridge mode

Last night pr0di9y assist me to setup:
1. in the BTU, setup PPPoE profile & enable Layer3 LAN2
2. WHR-G300N WAN port setup as Static IP
3. didn't do anything on the DIR-615 [currently in Bridge mode setup as per your guideline]
Overall connection as follows:
BTU LAN1 --> DIR-615 WAN->LAN4 --> IPTV
BTU LAN2 --> WHR-G300N WAN->LAN --> computers
So currently the NAT and PPPoE dial-up all done in BTU, no VLAN tag require on WHR-G300N
However, since my WHR-G300N is able to do tagging VLAN2.500, I'm wondering whether if it's possible to setup PPPoE dial-up in WHR-G300N instead of the BTU.
I'm not sure whether I can just disable the WAN-PPPoE dial-up on the BTU ?