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Author Topic: QoS on the internet itself  (Read 638 times)

Weaver

  • Kitizen
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  • Posts: 4004
  • Retd sw dev; A&A; 3 7km ADSL2; IPv6; Firebrick
QoS on the internet itself
« on: December 19, 2016, 07:14:18 AM »

Does anyone know anything about the level of support for QoS in routers and BRAS devices on the internet itself?

I read some encouraging things in various docs from BT. I'm not at all sure about my ISP though, and my router doesn't speak QoS, afaik.

Second question: Check my brain, which has completely failed temporarily: Where does QoS really need to live in terms of which routers in the path? Where the bottlenecks are? Or will it help just deploying it  upstream of a bottleneck, or what?
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aesmith

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  • Posts: 655
Re: QoS on the internet itself
« Reply #1 on: December 19, 2016, 04:26:38 PM »

It's most effect at bottleneck, because that's where the devices need to decide which packets to forward and which to drop.  Hence ISP's like A&A and Plusnet setting their profiles slightly lower than the BT Wholesale profile, so that they get to make the drop decisions and BTW can forward everything without further drops.
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