Multicast traffic % in enterprise network ?

Thu Aug 9 15:54:37 UTC 2018

On 9 August 2018 at 13:57, Saku Ytti <saku at ytti.fi> wrote:
> On Thu, 9 Aug 2018 at 15:27, James Bensley <jwbensley at 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.