On Wed, 2007-02-07 at 16:31, Jason Gunthorpe wrote: > On Wed, Feb 07, 2007 at 12:24:08PM -0800, Sean Hefty wrote: > > >I didn't get too far on getting CMA to work. Beyond the bad HopLimit > > >feild I was seeing Hal pointed out a number of problems in IBA that > > >would prevent it from working as is :< > > > > I've started thinking about what it would take to get the rdma cm to work > > across a router. I think the rdma cm may need to treat IPv6 addresses as a > > GID for this to work across subnets, versus trying to map an ipoib IP > > address to a GID based on ARP. > > I don't think that is the main problem - though clearly the way things > are now (for better or worse) rdma cm requires the IPoIB subnet to > span all of the IB subnets.. The main problem with the protocol is in > the LID selection for routed paths on the passive side. It can't rely > on the active side to identify the lids if a router is involved. > > One feature I've thought has been underused in IBA is the raw IPv6 > packet feature.
I thought raw support (including IPv6 header) although still in the spec was largely deprecated as the CRC protection was deemed too weak. -- Hal > It would be nice to have a linux netdev interface to > be able to do IPv6 traffic using GID addressing. That would seem to me > to be the natural way to bolt native GID addressing into rdma > cm.. > > Jason > > _______________________________________________ > openib-general mailing list > openib-general@openib.org > http://openib.org/mailman/listinfo/openib-general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general > _______________________________________________ openib-general mailing list openib-general@openib.org http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general