Re: Multicast traffic % in enterprise network ?

[James Bensley <jwbensley () gmail com>]

On 9 August 2018 at 13:57, Saku Ytti <saku () ytti fi> wrote:
> On Thu, 9 Aug 2018 at 15:27, James Bensley <jwbensley () gmail com> wrote:
>
> > A recent customer uses multicast to have the same packet arrive at
> > multiple destinations at the same time for resilience (their own
> > internal systems, not IPTV or media etc). Having just refreshed their
> > network for the next 5-10 years it's not going away anytime soon.
>
> I believe the same time delivery is motivation for stock exchanges
> too. One of the larger exchanges used MX and multicast, which of
> course does btree or utree (in this  case utree) replication, which
> makes delivery times are very much variant.
> So it is very much implementation detail what type of delivery time
> differences to expect in different ports and it is not by design
> superior to unicast.


I'm definately not saying it was a good idea / good design :)

I'm just saying that it's another example of multicast in use that is
not the usual IPTV or financial trading (aeronautical in this case).

Cheers,
James.