On Thu, 29 May 2008 17:00:27 -0600 Jason Gunthorpe <[EMAIL PROTECTED]> wrote:
> On Thu, May 29, 2008 at 02:35:35PM -0700, Ira Weiny wrote: > > > But that begs the question: Can a node issue an SNM request to a node in > > another IB subnet? (I think the answer is yes if the IP subnet spans more > > than > > one IB subnet) In that case, the SNM address would be in the range > > ff02::1:ff00:0/104 but what MGID would that map onto in IB? I think the > > current mapping results in an IB link-local scope. So would a router have > > to > > forward it even though the IB scope is link-local? > > IP (v4 and v6) 'link local' traffic (ie IPv4 broadcasts and IPv6 link > local multicast) use MGID scope bits that are dependent on the > configuration of the IPoIB stack. Today linux and everyone else uses > link local MGID scope. There are patches floating about to make this > configurable like pkey so that you can have a global IB scope IPoIB > subnet. We used that patch set at SC07 to demonstrate IPoIB running > single subnet across IB routers. > So, in that case if one is having issues with MLID space and wants to use my hack it should consolidate all the scopes. BTW, I still have on the back burner plans to implement a "real" fix to this problem... If only there were say -- 100 hours in a day? ;-) Ira _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
