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[lwip-users] Multicast MAC address filtering

From: Ivan Warren
Subject: [lwip-users] Multicast MAC address filtering
Date: Tue, 22 Jan 2019 18:36:04 +0100
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Lwip friends,

Is there a way for LWIP to register MAC addresses related to IPV4 or IPV6 multicast addresses to assist in multicast address filtering by the MAC (or possibly by upstream switches when supported - without using IGMP snooping - or whatever is used when MLD is used).

The NIC I use has the capability to filter Multicast Mac addresses (which can possibly reduce the load). I also have another NIC that is a virtualization NIC and can inform upstream switch(es) about the filtering.

Without this, a Multicast MAC destination is basically a broadcast ! (Of course, the filtering is probably done in LWIP at this point anyway).

(Or am I just on a wild goose chase ?)


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