[openib-general] question regarding GRH flag in ib_ah_attr

[Hal Rosenstock]

On Wed, 2006-05-10 at 19:35, Sean Hefty wrote:
> For context, I'm trying to work backwards from send a message on a UD QP to
> determine what information is needed and how it is obtained.
> 
> Does anyone know how the user determines if the grh flag should be set in the
> ib_ah_attr when allocating an ib_ah?  Do they do this by examining the GIDs in a
> path record?

Anytime the send is off the local subnet (as well as multicast), a GRH
is required. Also, there is a management response rule for responding
when the request contained a GRH that require a GRH (13.5.4.4 p. 769).

-- Hal

> 
> - Sean
> _______________________________________________
> openib-general mailing list
> openib-general at openib.org
> http://openib.org/mailman/listinfo/openib-general
> 
> To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general