The OP's router says "Default IGMP Version" mine says "Enable Efficient multicast forwarding (IGMP snooping).
I would assume that on the OP's there's an option to select Disable for the IGMP version. Can't be sure though as I can't find a full manual only a quick start guide.
Yeah its here in the link I shared:
[Wireless Router] How to set up IPTV on ASUS router? | Official Support | ASUS UK
Once you enable Multicast Routing you can then select a IGMP version 1-3, 3 is backwards compatible apparently so that setting at least shouldnt matter, but you only see the IGMP setting once routing is enabled, well read that walk through and see if I'm mis interpreting it?
@naylor2006 Thats correct, Once i select enable, then I have the option to choose IGMP V1-3.
I have posted on the Asus forums and someone has said 'Make sure you don’t need to manually enter a Vlan ID for it to work '
I have looked and found the below info, but when i enter this into the WAN settings the internet will not connect.
There is no VLAN for FTTP, only for FTTC.
@naylor2006 That explains that then thankyou!
Taking a glance at some of the posts in other forums on this router and similar chipsets the Multicast IPTV milage varies alot, there are numerous posts of people not getting it to work whilst others stating it 'just worked' for them with the exact same settings.
If you want a relatively cheap workaround that I can confirm works, pick up an ER-X, configure as per my post and use it as your router, then connect the Asus to it and just use that for your WIFI in Access Point mode or something.
Have you got Dual WAN disabled?
Clearly the way your Asus works is different to mine but then mine is nearly 10 years old.
Have you tried with the multicast routing disabled by any chance?
@TimCurtis @naylor2006 Yes, disabled Dual Wan and yes I have tried with Multicast disabled.
Just a quick update to say Asus have responded basically saying all the settings look good. I have uploaded logs from the router for them to take a look at and see if they can figure out whats going on. Will give another update as soon as I have one.
Thanks to everyone for your help thus far.
This is one of the benefits or a more 'open' router, you can check your own logs but its good ASUS will look and try to discover the issue for you.