[e2e] NDDI & OpenFlow
j.vimal at gmail.com
Thu Apr 28 10:29:58 PDT 2011
On 28 April 2011 09:33, Bob Braden <braden at isi.edu> wrote:
> On 4/27/2011 1:08 PM, A.B. Jr. wrote:
> I think that if end systems become able to dynamically reconfigure the
> network to suit their needs, this can change many of the assumptions made by
> present days e2e protocols, rendering some parts of them unnecessary, and
> other parts insufficient.
> – abj
> What a GREAT idea. I don't know why we never thought of it. As a starter, I
> would like my end system to reconfigure the network to give me all the
> available bandwidth and to drop none of my packets. So, that gets rid of
> the "fairness" assumption of present day E2E protocols and avoids the
> messiness of statistical multiplexing.
:-) I think there's a misconception here. OpenFlow exposes a vendor
agnostic API to control network elements by an end host. It doesn't
mean that every end host gets to choose what it wants.
Also, I am a bit curious about the wordings in the OpenFlow paper,
which starts as: "... a way for researchers to run experimental
protocols in the networks they use everyday..."
It seems like OpenFlow would allow testing experimental *routing*
protocols, or anything that only depends on control path. For any new
protocol that requires datapath support, OpenFlow (at the moment)
cannot support it. Examples of such protocols: XCP, RCP, etc.
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