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References: <tohojo/sqm-scripts/issues/125/729370708@github.com>
 <97b63035-262c-f000-9107-1c9f2f2d6049@sewingwitch.com>
From: Sam <shorewall@net153.net>
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Date: Fri, 20 Nov 2020 15:21:29 -0600
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Subject: Re: [Bloat] What is the ifb4 interface?
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While on the subject... I'm more interested in the packet flow. Like 
where does iptables fit at between the ifb and eth0?

--Sam


On 11/18/20 7:53 AM, Kenneth Porter wrote:
> I'd never understood what the ifb4 interface was for. Here's a nice 
> diagram from an sqm-scripts GitHub issue.
> 
> Ken
> 
> 
> -------- Forwarded Message --------
> Subject: 	Re: [tohojo/sqm-scripts] diagram needed (#125)
> Date: 	Tue, 17 Nov 2020 19:36:47 -0800
> From: 	taggart <notifications@github.com>
> Reply-To: 	tohojo/sqm-scripts 
> <reply+AANBO2FKVLZPL3BOBMDNBLV5YB345EVBNHHCY2DTJA@reply.github.com>
> To: 	tohojo/sqm-scripts <sqm-scripts@noreply.github.com>
> CC: 	Subscribed <subscribed@noreply.github.com>
> 
> 
> 
> Well it's not great, maybe something like this
> example 
> <https://user-images.githubusercontent.com/476401/99479609-5ad1a580-290b-11eb-8a36-e8e0757431c2.png> 
> Here's the dia file (gzip'd cause github)
> example.dia.gz 
> <https://github.com/tohojo/sqm-scripts/files/5557551/example.dia.gz>
> 
> I was trying to wrap my head around why ifb4 existed and how it worked. 
> Maybe it could somehow explain that qdisc's can only work on packets 
> leaving a device and that's the reason for the ifb4.
> 
> —
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