[openib-general] IPv6 and IPoIB scalability issue

[Jason Gunthorpe]

On Sat, Dec 02, 2006 at 07:27:37AM -0500, Hal Rosenstock wrote:

> > I don't know if this is worth persuing.. Certainly if the main issue
> > is just MLID usage then option 2 is much simpler. Something like this
> > might be part of improving IPv6 ND scalability but that is a different
> > problem entirely (and does anyone care?)..
> 
> Is that only an IPoIB issue though or is it more generic and apply to
> other networks ?

If the IB router spec goes down the path of pushing alot of the
responsability onto the routers then routers will have similar
problems with joining/tracking a large number of gorups. A prefix join
concept might be part of improving that.

I'm not sure what other protocols use extensive multicast like IPv6,
but multicast use on local segments is definately becoming more common.

Is anyone worried about IPv4 broadcast ARP scalability? With RDMA CM
and MPI all-to-all is that going to be a problem? IPv6 SN is a
solution to that ..

Jason