[Make-wifi-fast] Status of the industry on over buffering at the WiFi air interface

Jonathan Morton chromatix99 at gmail.com
Thu Feb 13 17:36:35 EST 2020

> On 14 Feb, 2020, at 12:23 am, David P. Reed <dpreed at deepplum.com> wrote:
> The modem clearly is capable of giving congestion control signals to a directly connected Ethernet path (non-wireless), by dropping packets.

No - by sending Pause frames back.  It's an increasingly-used method of applying back pressure on an Ethernet link, in preference to dropping packets.  If it *did* drop packets, you wouldn't get an F grade for bloat.

So the Nighthawk is correctly halting Ethernet output in response to those frames (it's probably a function of the NIC hardware or driver), but exercises absolutely no control over the queue that builds up as a result.

 - Jonathan Morton

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