On Tue, Dec 15, 2015 at 10:30:22AM -0700, Jason Gunthorpe wrote: > On Tue, Dec 15, 2015 at 05:38:34PM +0100, Michael Wang wrote: > > The hop_limit is only suggest that the package allowed to be > > routed, not have to, correct? > > If the hop limit is >= 2 (?) then the GRH is mandatory. Yes >= 2. "Setting this value to 0 or 1 will ensure that the packet will not be forwarded beyond the local subnet." -- IBTA 8.3.6 Hop Limit Ira > The > SM will return this information in the PathRecord if it determines a > GRH is required. The whole stack follows this protocol. > > The GRH is optional for in-subnet communications. > > Jason > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
