On Thu, 2 Jan 2014 16:49:16 +0000
Meirbhin O Conaill <[email protected]> wrote:

> Hi all,
> 
> I have followed the Ryu OpenFlow_Tutorial steps using the
> 'OpenFlow_Tutorial_Ryu3.2.ova'
> build.
> All was going great until I ran the command
> "PYTHONPATH=. ./bin/ryu-manager ryu/app/simple_switch.py" which started,
> but seemed to hang on "instantiating app ryu/app/simple_switch.py".
> After leaving it for 3 hours I escaped the process and tried a few more
> times after restarts, through SSH etc to no success.
> 
> I was wondering if this is a common issue or if someone knows what I am
> doing wrong.

What 'hang on' means? The command stalls until a switch connects and
then a packet-in message is delivered. For more details:

https://github.com/osrg/ryu/wiki/OpenFlow_Tutorial#running-ryu

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