[Beowulf] IB + 10G eth integrated switches?

[Mark Hahn]

> of IB to L2 of Eth. Those gateways have been installed in many places
> and work great.

thanks, but that's not what I'm asking for.  I am interested in 
actual experience from purchasers and users, not vendor/marketing praise.
for instance, if you stream TCP through such a route, can you saturate
the link?  how well does NFS work through such a network?