> Most of the IB protocols used by MPI target a LID. There is no
> existing notification path I know of that can replace LID-xyz with
> LID-123. The subnet manager might be able to do this but begs
> security issues.
> Interesting problem.....
It is not exactly correct. For migration between ports
on the same HCA you may use IB APM feature. It is already implemented
in Open MPI 1.3.X
In case of port migration between different HCA we need to do it in
software. And I guess it is
what Sylvain is doing.