[openib-general] [PATCH] IPOIB: Use a GRH when appropriate for unicast packets

[Jason Gunthorpe]

On Wed, Feb 07, 2007 at 01:35:25PM -0800, Roland Dreier wrote:
> Hmm, why is that?  Shouldn't IPoIB work through a router, and
> correctly get the GID of the final destination via ARP just fine?

Basically, if IB routers are used, and the IPoIB feature of *not*
spanning a subnet is used (for scalabililty?) then you need an
alternate way to specify addresses to rdma cm.

I agree that special casing some IPv6 addresses is a bad idea. It
needs to be integrated correctly with NET and the routing table/etc

Jason