Hi,

On Sun, 24 Nov 2013 22:52:18 +0100
Aldas Dise <[email protected]> wrote:

> I am working with Mininet emulation where a cluster of hosts is 
> connected to a single controller controlled by Ryu. When I issue a 
> command pingall, it takes some time for all hosts to ping each other. 
> When I issue pingall again, pinging runs much much faster. How come? I 
> believe this has to do with the amount of time flows are stored in flow 
> tables. By default it is 60 secs. But in Ryu it looks like the timeout 
> is longer.

You use simple_switch.py (or its friends)? If so, when you do pingall,
a controller gets some packet_in, and installs flows to
switches. After that, no packet_in happens since the appropriate flows
are in switches. The controller isn't involved.

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