[openib-general] Re: Problem configuring ipath_ether

[Michael S. Tsirkin]

Quoting r. Greg Lindahl <lindahl at pathscale.com>:
> ipath_ether uses InfiniBand protocols but is not the same as IPoIB. So
> it's better to ask support at pathscale.com about it. (The reason we ship
> it at all is that it's faster than IPoIB -- this necessitates a
> different wire format -- and it behaves more like an ethernet device
> than IPoIB.)

In what sense is it more like an ethernet device than IPoIB? Since IP over IB
just puts an IP packet inside a UD packet without overhead, what wire protocol
changes can thinkably be done, while still using InfiniBand protocols, to
improve performance?

-- 
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies