Thread (39 messages) 39 messages, 6 authors, 2021-04-04

Re: [PATCH net-next v1 2/9] net: dsa: tag_ar9331: detect IGMP and MLD packets

From: Oleksij Rempel <o.rempel@pengutronix.de>
Date: 2021-04-03 13:26:53
Also in: linux-mips, lkml

On Sat, Apr 03, 2021 at 04:03:18PM +0300, Vladimir Oltean wrote:
Hi Oleksij,

On Sat, Apr 03, 2021 at 01:48:41PM +0200, Oleksij Rempel wrote:
quoted
The ar9331 switch is not forwarding IGMP and MLD packets if IGMP
snooping is enabled. This patch is trying to mimic the HW heuristic to take
same decisions as this switch would do to be able to tell the linux
bridge if some packet was prabably forwarded or not.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
I am not familiar with IGMP/MLD, therefore I don't really understand
what problem you are trying to solve.

Your switch has packet traps for IGMP and MLD, ok. So it doesn't forward
them. Must the IGMP/MLD packets be forwarded by an IGMP/MLD snooping
bridge? Which ones and under what circumstances?
I'll better refer to the rfc:
https://tools.ietf.org/html/rfc4541

Regards,
Oleksij
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