[openib-general] Re: IBM eHCA testing..

[Fab Tillier]

> From: Troy Benjegerdes [mailto:troy at scl.ameslab.gov]
> Sent: Friday, October 14, 2005 9:09 AM
> 
> I just discovered another problem.. We have been running pfvs2 over
> IPoIB on the same subnet, and in debugging this, I restarted opensm
> several times, and somewhere in the stack a PVFS2 write failed. I
> wouldn't think that a short downtime of the SM from restarting it would
> cause any IPoIB TCP sessions to fall over..

If the path has already been resolved, traffic (even multicast) between existing
nodes will survive the SM going down.  You run into issues if you try to talk to
a new node and attempt to contact the SM for a path record, or if you try to
bring up a new interface.

- Fab