DSA Mini-tutorial

Arınç ÜNAL arinc.unal at arinc9.com
Wed Sep 7 11:59:10 PDT 2022

On 07/09/2022 21:32, Rich Brown wrote:
>> On Sep 6, 2022, at 5:33 PM, Florian Fainelli <f.fainelli at gmail.com> wrote:
>>> I don't see much content to document DSA. All DSA does is creating a network interface for each switch port. What I think should be properly documented is the Bridge VLAN filtering feature. I have made some efforts to do that on my playground here:
>>> https://openwrt.org/playground/arinc9/start
>>> ...
>> Maybe this is enough to reference since it contains basic use cases, and not so basic ones, too:
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/dsa/configuration.rst
>> -- 
> I have the sense that the terminology surrounding DSA is very murky. But in the DSA Mini-tutorial, (https://openwrt.org/docs/guide-user/network/dsa/dsa-mini-tutorial) I made a distinction between "Devices" and "Interfaces in the Terminology section.
> - Devices are things that 'send bits' without regard for IP address or subnets
> - Interfaces correspond to IP subnet ranges, and the routing function within the router moves packets between interfaces.
> I wrote this mostly because the LuCI interface itself makes a distinction between the "Devices" tab and the "Interfaces" tab. But maybe this isn't the best way to describe what goes there.

I agree that there are inconsistencies in LuCI. The only place I see the 
terminology correctly stated is on the wireless section:

Network: Lists all entries on the Interfaces section.

 > Choose the network(s) you want to attach to this wireless interface 
or > fill out the custom field to define a new network.

Which correctly states that:

Interfaces section should be called Networks.
Devices section should be called Interfaces.

> Perhaps we could get the designer of the LuCI interface and other networking gurus to weigh in on how to describe this. Thanks.
> Rich
> PS I don't have a dog in this fight. If the entire Mini-tutorial were scrapped, and replaced with a description of what's true and correct, I would be happy. Thanks again


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