Hi,

Please refer to "<Reference> Transfer path of the applied packet" at Ryu-Book.
The Port No.3 is required in the case of GroupMod message tests which tests the 
Group actions.
 
https://osrg.github.io/ryu-book/en/html/switch_test_tool.html#reference-transfer-path-of-the-applied-packet

Thanks,
Iwase

On 2015年10月06日 17:22, Sascha Bleidner wrote:
> Hello,
> 
> I want to execute the switch test tool for a OF hardware switch.
> https://osrg.github.io/ryu-book/en/html/switch_test_tool.html
> 
> I currently try to figure out, why I need 3 ports connected between the two 
> switches. Right now I only have 2 connected ports between the two switches. 
> Can I specify this somehow before executing the test? Or why does the test 
> really require 3 ports? 
> 
> Thanks! 
> 
> Kind regards,
> Sascha
> 
> 
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> Ryu-devel@lists.sourceforge.net
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