On 2019-02-23 6:33 a.m., Ahmed Al-Utaibi wrote:
even if i make the hard time out very small, there is no grantee that the flow will be matching thousands of packets.

Maybe look at it the other way around:  use a low precedence flow entry to punt packets to your application.  Your application then installs a higher priority more specific flow entry to bypass the default.  Probably more deterministic that way.

On Sat, Feb 23, 2019 at 1:01 AM Artem Gromov <artyomgro...@gmail.com <mailto:artyomgro...@gmail.com>> wrote:

    you can use flow entries with hard_timeout.

    On Tue, Feb 19, 2019, 16:06 Ahmed Al-Utaibi <ahmed...@gmail.com
    <mailto:ahmed...@gmail.com>> wrote:

        Hello everyone

        I am looking for a way to match with a flow but instead of
        sending all matched packets of the flow to the controller, the
        switch only sends one packet (the first to match, maybe the
        first in a fixed time period). After that the table entry can
        be removed (or the fixed time can be reset).


Raymond
https://blog.raymond.burkholder.net
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