Hi,everyone     Today I test the ryu app simple vlan.At first,I only running 
the simple_vlan app use the command on controller:
                ryu-manager --verbose --observe-links ryu.app.simple_vlan.py‍
     But when I pointed the switch(pica8 3297) to this controller,some errors 
occured like this:
        
     But in the file controller.py I find the OFPP_NONE was defined at 
ofproto_v1_0.py,and the value is 0xffff.The switch use the openflow 1.3 ,if I 
should change the controller.py to import ofproto_v1_3?‍
     Is there anyone who know how to solve this problem,or give me some 
suggestions.thank you very much.
     By the way,there is another question,what is the simple_vlan app's 
function? If the simple_vlan app can configure the vlan interface 
(access,trunk,hybride), and how can I configure it.


Thanks,‍
Chengpan

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