[ofiwg] Multicast issues

Christoph Lameter christoph at graphe.net
Wed Jun 11 13:18:46 PDT 2014

Maybe it's a bit much to ask. I was looking for a standard way of forwarding multicast between different fabric. F.e. Infiniband to Ethernet or infiniband to cray interconnect or whatever.

christoph at lameter.com (202)596-5598

> On Jun 11, 2014, at 2:36 PM, "Hefty, Sean" <sean.hefty at intel.com> wrote:
> I added these comments to the requirement doc, except for this one:
>>>> 3. Transition of multicast traffic between fabrics.
>>>> ----------------------------------------------------------
>>>> The conversion of multicast traffic to and from Ethernet has been
>>>> problematic in the past since a mapping needs to occur between different
>>>> fabrics. IPoIB requires a subscription on the Ethernet level and on the
>>>> Infiniband level which caused race conditions that took a long time to
>> get
>>>> under control. Semantics for transitioning between fabrics could be
>> useful.
>>>> Preferably one transaction only should cause a multicast group
>>>> subscription.
> I can't say that I understand what you're looking for here.
> - Sean

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