Confirming source-routed multicast is dead on the public Internet
sean at donelan.com
Tue Jul 31 21:28:31 UTC 2018
Its tought to prove a negative. I'm extremely confident the answer is yes,
public internet multicast is not viable. I did all the google searches,
check all the usual CAIDA and ISP sites. IP Multicast is used on private
enterprise networks, and some ISPs use it for some closed services.
I got sent back with a random comment from a senior official saying "but
I heard different." I bit my tongue, and said I would double (now
If any ISPs have working IP source-routed multicast on the public
Internet that I missed, or what I got wrong. That's what content
distribution networks (cdn's) are for instead.
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