Re: [net-next PATCH v5 1/4] net: hsr: Provide RedBox support (HSR-SAN)

Paolo Abeni
2024-04-18T08:47:51Z

On Mon, 2024-04-15 at 14:49 +0200, Lukasz Majewski wrote:
> Introduce RedBox support (HSR-SAN to be more precise) for HSR networks.
> Following traffic reduction optimizations have been implemented:
> - Do not send HSR supervisory frames to Port C (interlink)
> - Do not forward to HSR ring frames addressed to Port C
> - Do not forward to Port C frames from HSR ring
> - Do not send duplicate HSR frame to HSR ring when destination is Port C
>
> The corresponding patch to modify iptable2 sources has already been sent:
> https://lore.kernel.org/netdev/20240308145729.490863-1-lukma@denx.de/T/
>
> Testing procedure:
> ------------------
> The EVB-KSZ9477 has been used for testing on net-next branch
> (SHA1: 5fc68320c1fb3c7d456ddcae0b4757326a043e6f).
>
> Ports 4/5 were used for SW managed HSR (hsr1) as first hsr0 for ports 1/2
> (with HW offloading for ksz9477) was created. Port 3 has been used as
> interlink port (single USB-ETH dongle).
>
> Configuration - RedBox (EVB-KSZ9477):
> if link set lan1 down;ip link set lan2 down
> ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45 version 1
> ip link add name hsr1 type hsr slave1 lan4 slave2 lan5 interlink lan3 supervision 45 version 1
> ip link set lan4 up;ip link set lan5 up
> ip link set lan3 up
> ip addr add 192.168.0.11/24 dev hsr1
> ip link set hsr1 up
>
> Configuration - DAN-H (EVB-KSZ9477):
>
> ip link set lan1 down;ip link set lan2 down
> ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45 version 1
> ip link add name hsr1 type hsr slave1 lan4 slave2 lan5 supervision 45 version 1
> ip link set lan4 up;ip link set lan5 up
> ip addr add 192.168.0.12/24 dev hsr1
> ip link set hsr1 up
>
> This approach uses only SW based HSR devices (hsr1).
>
> -------------- ----------------- ------------
> DAN-H Port5 | <------> | Port5 | |
> Port4 | <------> | Port4 Port3 | <---> | PC
> | | (RedBox) | | (USB-ETH)
> EVB-KSZ9477 | | EVB-KSZ9477 | |
> -------------- ----------------- ------------

The above description is obsoleted by follow-up tests, right?

Thanks,

Paolo