Fab> I would personally rather see a reserved bit get used.
Fab> Imagine a system that has two protocols installed that use IP
Fab> addressing. That system might want to have different apps
Fab> listening on the same port number over both, even though the
Fab> protocols are different.
I disagree. The port number is part of an IP address, and it doesn't
make sense to have two different services listening to the same port.
You can't do it over TCP or iWARP, and I don't see any reason for IB
to support this.
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.
Mike
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