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<font size=3>At 11:09 AM 10/20/2005, Roland Dreier wrote:<br>
<blockquote type=cite class=cite cite=""> Fab> I
would personally rather see a reserved bit get used.<br>
Fab> Imagine a system that has two protocols
installed that use IP<br>
Fab> addressing. That system might want to
have different apps<br>
Fab> listening on the same port number over both,
even though the<br>
Fab> protocols are different.<br><br>
I disagree. The port number is part of an IP address, and it
doesn't<br>
make sense to have two different services listening to the same
port.<br>
You can't do it over TCP or iWARP, and I don't see any reason for IB<br>
to support this.</blockquote><br>
This is one of the reasons why there is a SDP port mapper defined for
iWARP. The application listens on a defined service port but based
on policy outside of the protocol, the application instance may be
redirected to different IP address or port to transparently operate over
a RDMA interconnect. So, the application listens on one port while
the RDMA infrastructure transparently listens on a separate port and
potentially IP address.<br><br>
Mike</font></body>
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