Switches which use Linux bridge IGMP/MLD snooping?

["Linus Lüssing" <linus.luessing@c0d3.blue>]

Hi,

I would like to get our hackspace more multicast ready. Especially
to do some multicast routing between our hackspace and our
Freifunk wireless mesh network, which thanks to batman-adv and the Linux
bridge is now multicast aware. We do have several donated, older switches
that others outsourced. But I don't trust them to do IGMP/MLD snooping
correctly.

Therefore I'm looking for something that does the multicast
forwarding in hardware but uses the IGMP/MLD snooping from the
Linux bridge in kernelspace and runs on OpenWrt. So I guess I'm
looking for something DSA + switchdev capable, but I guess not
all of them support using IGMP/MLD snooping in kernelspace?
I see some drivers which use DSA's port_mdb_add (b53, bcm_sf2,
lan9303, microchip ksz, mt7530, mv88e6xxx, ocelot felix, qca8k-8xxx,
sja1105) and/or switchdev's switchdev_obj_port_mdb (same as for
DSA plus ksz9477, freescale dpaa2, marvell prestera,
mellanox mlx5/mlxsw, lan966x, sparx5, ti am65-cpsw/icssg).

Does anyone know of specific devices/products which should work for us
and might have some recommendations?

Regards, Linus

PS: Minimum spec would be 8 ports, managed, 1Gbit, ideally with
at least 4 PoE ports. (The hackspace in total also has 46x RJ45
network sockets distributed over three rooms. But I don't think we
need full multicast capabilities on all of them to start with.
especially as that would probably considerably bump the price.)