Hi Arne,

Thank you for your report!

First, Ryu is implemented to send HELLO message at the "Handshake"
phase before sending any other OpenFlow messages.
Ryu should send HELLO message regardless of the switch sent HELLO
message to Ryu or not.
  https://github.com/osrg/ryu/blob/master/ryu/controller/controller.py#L368

Could you check the packet captures of the sent packet between Ryu
and your switches?
You can use tcpdump and wireshark to capture packets.

Thanks,
Iwase


On 2017年03月29日 13:24, Arne Goetje wrote:
> Hi Devs,
> 
>  
> 
> I’m trying to use ofctl_rest with a switch running OF-DPA 3.0.4.0.
> 
>  
> 
> OF-DPA sends out HELLO messages to the controller and expects a HELLO back. 
> Instead it receives OPF_FEATURE_REQUEST messages from ryu.
> 
> Therefore the connection setup fails and the session gets torn down.
> 
>  
> 
> Which file do I need to hack in order to give OF-DPA what it expects?
> 
>  
> 
> Thanks! J
> 
>  
> 
> Cheers
> 
> Arne
> 
> 
> 
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