Hello,
i would like to suggest an extension to the OpenFlow standard for packet
sampling.
I already presented the extension at this years SIGCOMM in the poster
session and now i would like to know how you people think about the idea.
In environments with a high arrival rate of new flows, such as in a data
center, it is not feasible to install one rule for each flow. A doable
approach here is to group flows by wildcard rules. Thus the network is
equipped with a bunch of default routes. This of course makes traffic
engineering very hard because you no longer know which flows are hiding
behind which wildcard rule. So you need some kind of elephant detection
to extract large flows from the wildcard rule and install a custom route
for this flow. One default technique here is packet sampling.
To do packet sampling today one needs a protocol like sFlow or netFlow
to control packet sampling at the switches. Since we already use
OpenFlow to manage our switches for me it makes a lot of sense to
include this into the OpenFlow protocol.
We developed a very simple extension to the OpenFlow standard that can
be found here:
http://conferences.sigcomm.org/sigcomm/2013/papers/sigcomm/p541.pdf
I'm looking forward to your comments.
Best,
Philip
--
Philip Wette, M.Sc. E-Mail: we...@mail.upb.de
University of Paderborn Tel.: 05251 / 60-1716
Department of Computer Science
Computer Networks Group http://wwwcs.upb.de/cs/ag-karl
Warburger Straße 100 Room: O3.152
33098 Paderborn
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