netdev - Re: net: dsa: lantiq_gswip: getting the first selftests to pass

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Date:   Thu, 28 Jul 2022 15:30:55 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        netdev@...r.kernel.org, andrew@...n.ch, vivien.didelot@...il.com,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Aleksander Jan Bajkowski <olek2@...pl>
Subject: Re: net: dsa: lantiq_gswip: getting the first selftests to pass

On 7/27/22 17:02, Vladimir Oltean wrote:
> On Wed, Jul 27, 2022 at 02:07:51PM -0700, Florian Fainelli wrote:
>> Since I am in the process of re-designing my test rack at home with
>> DSA devices, how do you run the selftests out of curiosity? Is there a
>> nice diagram that explains how to get a physical connection set-up?
>>
>> I used to have between 2 and 4 Ethernet controllers dedicated to each
>> port of the switch of the DUT so I could run
>> bridge/standalone/bandwidth testing but I feel like this is a tad
>> extreme and am cutting down on the number of Ethernet ports so I can
>> put NVMe drives in the machine instead.
> 
> tools/testing/selftests/net/forwarding/README
> 
>                              br0
>                               +
>                vrf-h1         |           vrf-h2
>                  +        +---+----+        +
>                  |        |        |        |
>     192.0.2.1/24 +        +        +        + 192.0.2.2/24
>                swp1     swp2     swp3     swp4
>                  +        +        +        +
>                  |        |        |        |
>                  +--------+        +--------+
> 
> Most of the tests assume these 4 ports, otherwise the topology is
> mentioned in a drawing for that particular selftest.
> 
> The names used by the tests are actually $h1 and $h2 for the host ports
> (extreme left and extreme right) - these terminate traffic - and $swp1
> and $swp2 (mid left and mid right) - these forward traffic. In the
> drawing from the README, I suppose the names "swp1 ... swp4" were used
> to illustrate that you can use switch net devices as host ports, and
> also as forwarding ports.

Thanks! I will get to that later this week.
-- 
Florian