Messages in this thread | | | Date | Tue, 15 Dec 2015 10:30:22 -0700 | From | Jason Gunthorpe <> | Subject | Re: [PATCH RESEND] infiniband:core:Add needed error path in cm_init_av_by_path |
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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. 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
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