Re: Comments on draft-ietf-mboned-ieee802-mcast-problems

-----Original Message-----
From: MBONED <[email protected]> On Behalf Of Mikael Abrahamsson

> On Mon, 25 Mar 2019, Holland, Jake wrote:
>>
>> Hi mboned,
>>
>> After the hackathon yesterday (in which I worked on AMT service
>> discovery via DNS-SD for a home network) David Lamparter came
>> to introduce himself and credibly inform me that the multicast
>> WiFi problems we see are largely an implementation problem with
>> the Linux bridge code, rather than an inherent problem with WiFi.
>
> I'd like to know more about this. Since even the IEEE has admitted to this 
multicast problem I doubt it's implementation specific like that.

Me too. Are we talking about successfully implementing WiFi multicasting *without* having to resort to layer 2 retries? Are many of the missed multicast packets in WiFi caused by something other than dropped packets at the radio layer? That would be very interesting indeed.

Otherwise, implementing multicast retries at layer 2 has its own drawbacks. Seems less than a great idea, especially at the high packet rates used in streaming. IMO.

Bert

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