[ewg] iWARP WAN test problem

[Paul Grun]

And just to complete the picture:

RoCE runs on top of Ethernet (layer 2)
IB runs on top of IB network, link and phy layers
iWARP runs on top of TCP/IP (as Steve says below).

Both RoCE and IB use the same transport layer.

> -----Original Message-----
> From: ewg-bounces at lists.openfabrics.org [mailto:ewg-
> bounces at lists.openfabrics.org] On Behalf Of Steve Wise
> Sent: Thursday, March 03, 2011 9:54 AM
> To: fanqielee at gmail.com
> Cc: ewg at lists.openfabrics.org
> Subject: Re: [ewg] iWARP WAN test problem
> 
> Unlike Infiniband, iWARP runs on top of TCP/IP and thus is routable.
> 
> 
> On 03/03/2011 07:45 AM, Tanin wrote:
> > Thanks, Richard.
> > So, is that also apply to iWARP? If there is an IP router in between the
> path, iWARP would not work, right?
> >
> > On Thu, Mar 3, 2011 at 4:21 AM, richard at informatix-sol.com
> <mailto:richard at informatix-sol.com>
> > <richard at informatix-sol.com <mailto:richard at informatix-sol.com>> wrote:
> >
> >     RDMA only works over layer2 Ethernet. If you have an IP router in
> path it won't work.
> >     For long haul infiniband we use buffer devices, such as obsidian
> longbows, to sustain throughput over the long haul.
> >
> >     Richard
> >
> >
> >
> >
> > --
> > Best regards,
> > ------------------------------------------------------------------------
> -----------------------
> > Li, Tan
> > PhD Candidate & Research Assistant,
> > Electrical Engineering,
> > Stony Brook University, NY
> >
> > Personal Web Site: https://sites.google.com/site/homepagelitan/Home
> >
> > Email: fanqielee at gmail.com <mailto:fanqielee at gmail.com>
> >
> >
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