nanog mailing list archives
Re: Confirming source-routed multicast is dead on the public Internet
From: Miles Fidelman <mfidelman () meetinghouse net>
Date: Wed, 1 Aug 2018 13:38:56 -0400
On 8/1/18 12:24 PM, Saku Ytti wrote:
Personally, I think the use case is a lot stronger for multi-person video conferencing.Hey Mankamana,other than billing problem, is there any other reasons why multicast would not be viable for public internet ?Imagine someone like youtube or netflix would like to use multicast, instead of caches. They'd need to start new multicast stream for every content with small delay (to get more viewers on given stream), how much delay would consumer tolerate before content starts? 1min? 5min? So every minute or every 5 minute new stream of movie would be sent, except it would need to be sent many times, for each bitrate supported. Each of these streams is wide (wider than unicast) HW state that needs to be stored on every device on path, for unicast we only store 1 narrow HW state per destination, for multicast we store 1 wide HW state per flow/stream, we don't have the hardware to do that, if there would be any significant demand for multicast. It only works when there is no use-case for it, and even then, it's insecure DoS vector.
Miles Fidelman -- In theory, there is no difference between theory and practice. In practice, there is. .... Yogi Berra
Current thread:
- Re: Confirming source-routed multicast is dead on the public Internet Aaron Gould (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Steve Meuse (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Sean Donelan (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Hunter Fuller (Aug 01)
- <Possible follow-ups>
- Re: Confirming source-routed multicast is dead on the public Internet Mankamana Mishra (mankamis) via NANOG (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Dale W. Carder (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Saku Ytti (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Michael Crapse (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Tarko Tikan (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Mark Tinka (Aug 02)
- Re: Confirming source-routed multicast is dead on the public Internet Miles Fidelman (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Saku Ytti (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet Saku Ytti (Aug 01)
- Re: Confirming source-routed multicast is dead on the public Internet John Levine (Aug 02)
- Re: Confirming source-routed multicast is dead on the public Internet Sean Donelan (Aug 02)