[openib-general] multicast

[Andrew Friedley]

I'm trying to understand how the ibverbs multicast API works, but I'm 
not sure how multicast groups are created.  I understand that 
ibv_attach_mcast() and ibv_detach_mcast() are used to leave/join a 
particular multicast group, but IB architecture spec indicates a group 
must be created first.  How do I do this?

Actually, is there any multicast sample code anywhere?

Thanks,

Andrew