Re: RFC 5771 - Global Multicast Addresses

[Niels Bakker <niels=nanog () bakker net>]

* brandon () brandonsjames com (Brandon James) [Mon 05 Aug 2019, 17:17 CEST]:
> As a young network engineer (no historic perspective) and only SMB 
> and enterprise experience. It seems like the intention was to allow 
> these to be publicly routed, but it would be a nightmare to 
> implement so it never was.

Multicast was never popular with operators because it had the 
potential to create a lot of state across every router in a network, 
as well as lead to uncontrolled explosions of traffic, especially in 
network designs that relied on virtual circuits for significant 
portions of last-mile infrastructure.

Some of these problems were addressed with SSM, IP DSLAMs, and having 
consumer connection speeds be significantly faster than what a Full HD 
video stream requires, but given that major network providers already 
don't have the in-house clue to implement IPv6, multicast will be very 
low priority.


        -- Niels.

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