Brian

@Zölcsi I can confirm all I needed to do was enable DHCP on the Sagecom router (I disabled it). I connected the STB directly to the Sagecom router (not through my switch) and the STB works fine. Thank you @btudos! I'm in Hungary and happy to buy you a drink anytime!

@Zolcsák my mention wasn't working in the previous post. Hope this alerts you of the response.

@zolcsi Good timing. Because of Covid I have not been home in a very long time. I'm on my way home now and will be there today. Over the coming weeks I will be troubleshooting the problem. I had someone connect the the cable as BTZ described, however it didn't work. I suspect it's related to DHCP that I disabled on the Sagecom router.

@BTZ How do I check this? Now that you mention it, I may have disabled DHCP on the Sagemcom modem. I can't remember. can I manually configure an IP on the IPTV? What should I set?

Szia! I have configured PPPoE passthrough on my Telekom Sagemcom 5655v2 modem. I connect my gateway to the modem and Internet is working. See attached diagram. I cannot get the Telekom IPTV STB to work. What do I need to do?

@btz @zoli62 What't I'm trying to say about IPTV not working when PPPoE is enabled is that on the Sagemcom I have to remove PPPoE credentials (only one device can use PPPoE credentials at a time). I assume the Sagemcom will not route Internet traffic for devices (such as the IPTV STB) connected directly to one of the Sagemcom LAN ports. I never tested this.

@btz I agree, PPPoE passthrough is independent of IPTV. The issue appears to be IGMP support on my switch. When I return I need to do some more performance testing... 1. I'll do more testing with Unifi Security Gateway (USG). Possibly connecting my computer directly to the USG and avoid my switch. I believe the issue is that I need to set MTU on my USG to 1300 and re-do the speed tests. 2. I will confirm performance of USG when PPPoE passthrough is disabled (i.e. using a double NAT configuration). 3. If possible, I will even connect my computer directly to the Sagemcom and configure PPPoE on my computer and test performance. Thank you again for all the help. I wont be back until February to test.

@zoli62 With PPPoE Enabled, I connected the IPTV STB directly to the Sagemcom router. It did not appear to work. I should do more testing. I may have turned off DHCP server on the Sagemcom as well. Are you saying that the STB will continue to work when connected to the Sagemcom and PPPoE is enabled?

@btz I'm continuing to research IGMP support... I'm not able to test it until I return. I have noticed a difference in speed tests since configuring as PPPoE passthrough. Prior to configuring PPPoE passthrough, my speed test was about 913/928 Mbps (down/up). After configuring PPPoE passthrough, my speed test is about 400/900 Mbps (down/up). Perhaps I need to do testing over a longer period of time. I do not believe this is an issue with my Unifi Security Gateway... others report 1000 Mbps performance. When I can, I'll do more performance testing. Any thoughts? Is this a limitation of the Sagemcom router when using PPPoE passthrough? I'm looking into pros/cons of disabling PPPoE passthrough and configuring my firewall behind the Sagemcom (i.e. double NAT configuration).

@btz I have Unifi PoE switch. I'll check out if it supports IGMP.

Updates.. All went very smoothly. I reset the password on the Telekom PPPoE service and successfully enabled PPPoE Passthrough on the Sagemcom device. I configured my Unifi USG router/firewall and all is good. I connected the Telekom STB to my switch, however, it does not appear to be working. All other devices connected to my switch and wifi are working. Suggestions?

@BTZ You're amazing. Thank you for all the help!

@abit @BTZ Thank you for the tips and screenshots. I'm at the house next week and will try this. Not sure if Telekom provided a sheet with the PPOE credentials. Will this affect IPTV in anyway? Can I plug the IPTV STB into my own switch? Is it possible to get IPTV credentials and use an IPTV app on my Apple TV or computer?

@ abit I have the Sagemcom F@st 5655v2.

Thank you for the quick response. I'm unsure what PPOE passthrough mode gets me or how it's configured. I would like to use my own firewall (Unifi USG) and it obtaining an Internet address (not a private IP address due to double NAT). Do I need to request a different fiber modem?