[Bloat] What is the ifb4 interface?

[Bloat] What is the ifb4 interface?

[Kenneth Porter]

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I'd never understood what the ifb4 interface was for. Here's a nice 
diagram from an sqm-scripts GitHub issue.

Ken


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Subject: 	Re: [tohojo/sqm-scripts] diagram needed (#125)
Date: 	Tue, 17 Nov 2020 19:36:47 -0800
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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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Re: [Bloat] What is the ifb4 interface?

[Sam]

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.
> 
> —
> You are receiving this because you are subscribed to this thread.
> Reply to this email directly, view it on GitHub 
> <https://github.com/tohojo/sqm-scripts/issues/125#issuecomment-729370708>, 
> or unsubscribe 
> <https://github.com/notifications/unsubscribe-auth/AANBO2DSP3T2M2XU42J3TFDSQM6M7ANCNFSM4TZAZ6JQ>.
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