Hi, On Wed, 2007-02-14 at 11:12, Batwara, Ashish wrote: > Hi, > I am referring to Section 4.1.1 of IB Spec which talks about "GID Usage > AND Properties". Does anyone know whether or not SM uses item # 3 below > for the address assignment and who are all the vendor supports # 3?
> Can anybody points me to the appropriate driver documentation in this area? OpenSM supports setting either the default GID prefix or a configured GID prefix and GIDs are comprised of this prefix and the endport EUI-64 (at index 0 of GUIDInfo). OpenSM does not currently support configuring GUIDInfo indices above 0. I'm also not sure how the stack would deal with this either. Is this a requirement for some reason ? If so, can you elaborate/explain ? -- Hal > Thanks > Ashish > > > GID USAGE AND PROPERTIES > 1) Each endport shall be assigned at least one unicast GID. The first > unicast GID assigned shall be created using the manufacturer assigned > EUI-64 identifier. This GID is referred to as GID index 0 and is > formed by techniques 3(a) and 3(b) described below. > 2) The default GID prefix shall be (0xFE80::0). A packet using the > default > GID prefix and either a manufacturer assigned or SM assigned > EUI-64 must always be accepted by an endnode. A packet containing > a GRH with a destination GID with this prefix must never be > forwarded by a router, i.e. it is restricted to the local subnet. > 3) A unicast GID shall be created using one or more of the following > mechanisms: > a) Concatenation of the default GID prefix with the manufacturer > assigned > EUI-64 identifier associated with an endport. This GID is > referred to as the default GID. > b) Concatenation of a subnet manager assigned 64-bit GID prefix > and the manufacturer assigned EUI-64 identifier associated with > an endport. > c) Assignment of a GID by the subnet manager. The subnet manager > creates a GID by concatenating the GID prefix (default or assigned) > with a set of locally assigned EUI-64 values (at GID index > 1 or above). Each endport must be assigned at least one unicast GID > using (a). Additional GIDs may be assigned using (b) and/or (c). Note: A > subnet > shall only have one assigned GID prefix (non default) at any given > time. > > _______________________________________________ > 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