Ok, so it was working well before, and now it works the same.
But what i think is not correct in your configuration, on the Asus router, you should be able to handle multiple vlan which is actualy not the case because you only send to the Asus the traffic of 1 vlan.
if your isp is using 1 vlan for internet, another one for the IPTV, and another one for the VOD (video on demand), your actual configuration would not work.
A true bridge mode should send all the traffic to the Asus regardless to the vlan, and the Asus should set the vlan interface.
as i can see here :
http://demoui.asus.com/Advanced_IPTV_Content.aspyou have to set "Select ISP Profile" to
manual setting. And then you can set your vlans :
That way on the DGA4132 you don't need to set any vlan anymore.