@Kevin_Z 

 

Thanks for a reply. 

Ok, I'll try to explain my whole situation....

 

ISP plan is 300mbps. 

 

To begin with, I am using archer c6 as my secondary router. 

I live in a house and router provided by my ISP is located in one of the storage rooms together with all other communication cables in a metal storage box. Due to poor wifi coverage and no possibilities to move ISP router because of LAN ports going to every room in the house I came up with the solution to get another router (archer c6) and set it up in my living room behind my TV. 

 

So I used my lan cable that goes from my ISP router to the living room and connected it to wlan port of archer c6. Archer's lan port4 is connected to my TV box (Arris). 

 

Archer c6 is in router mode, IGM snooping OFF, IGM proxy ON, IPTV set on LAN4 as bridge mode. QoS is OFF as it says that it cannot be activated at the same time with IPTV. 

 

Internet speeds on lan 300mbps as ISP provide. 5Ghz same 300mbps, 2.4Ghz max out at 100mbps. 

I have no problems with internet connection, coverage, etc. Everything is as expected, however things go bad once someone in the house start to download something.

 

It does not matter at what speeds, whether it is 2.4 or 5 Ghz. I have tried to reduce download speed to 50mbps and still no effect. My TV just become a frame moving photo book. Everything comes back to normal when downloads are not active. Browsing, watching YT, conf calls does not affect IPTV operation. 

 

I am no expert by any means so it might be that I am missing something, just not sure where to start to fix it. 

 

P.S By using router from ISP only I have no problems at all, it is even possible to utilize full speed for downloads and TV won't lag at all.