Monday, September 20, 2021

Comcast business cable modem replacement that will provide QoS?

Helping out with a friend's church. They're doing live streaming of Sunday services and want to provision enough upstream bandwidth that the stream does not suffer in quality.

Current modem is a Technicolor CGA4131COM, and the setup looks like this;

[Cable Modem (1GB down, 35 up)] <---> [Ubiquiti Dream Machine Pro] <---> [Unifi Switches] / [Unifi APs] / Streaming Computer 

Now 35mbps *should* be plenty without worrying about QoS, but when you get hundreds of people in the building (including staff) there are a lot of question marks.

Unfortunately the DMP isn't able to provide any traffic shaping. At least not on the wired ports. So it seems like the easiest thing to do would be to find a cable modem capable of QoS and then hang the streaming computer off of one port and the DMP off the other. This might end up with the cable modem being the DHCP server (or just going double-NAT) but it is what it is.

First I'm just curious if there is a compatible modem that can give me QoS features.



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