[openib-general] IP addressing on InfiniBand networks

[James Lentini]

On Tue, 28 Jun 2005, Roland Dreier wrote:

>    James> First off, here [are the] requirement we are trying to satisfy:
>
>    James>    On the passive side of a connection, a InfiniBand kDAPL
>    James> provider must determine a source IB address for an
>    James> InfiniBand connection request.  This information can be
>    James> obtain by a kDAPL consumer either in the
>    James> DAT_CONNECTION_REQUEST_EVENT's dat_cr_arrival_event_data or
>    James> dat_cr_query()'s dat_cr_param structure.
>
>    James>    By interoperable, we mean that the solution must not
>    James> introduce a non-standard protocol or force ULPs using kDAPL
>    James> to perform special operations when using an InfiniBand
>    James> network.
>
> Since these two points are mutually contradictory

Which two points? The ability to determine a source IB address for an 
InfiniBand connection request and interoperability?

I don't think those two are contradictory by definition.

>  -- the IB communication management protocol does not carry enough 
> information for a connection request to be mapped uniquely back to a 
> source address -- we need to figure out which one to drop.
>
> I would argue in favor of the solution selected by SDP: when defining
> the binding of an abstract protocol to the IB transport, put the
> source and destination IP addresses in the IB-specific connection
> setup messages.
>
> - R.
>