This is a minimal change to keep the supplied sample code
working with latest software. The sample code is not compatible
with OFP v1.3+, and if there is no requirement on supported version
Ryu will probably accept latest supported OF switch.

Signed-off-by: Monthadar Al Jaberi <[email protected]>
---
 doc/source/writing_ryu_app.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/source/writing_ryu_app.rst b/doc/source/writing_ryu_app.rst
index 0980ecd..8f8556b 100644
--- a/doc/source/writing_ryu_app.rst
+++ b/doc/source/writing_ryu_app.rst
@@ -53,8 +53,11 @@ the ports.
    from ryu.controller import ofp_event
    from ryu.controller.handler import MAIN_DISPATCHER
    from ryu.controller.handler import set_ev_cls
+   from ryu.ofproto import ofproto_v1_0
    
    class L2Switch(app_manager.RyuApp):
+       OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
+
        def __init__(self, *args, **kwargs):
            super(L2Switch, self).__init__(*args, **kwargs)
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