Hi,
One basic doubt. Most of the simple_switch apps have this part of code
# install a flow to avoid packet_in next time
if out_port != ofproto.OFPP_FLOOD:
match = parser.OFPMatch(in_port=in_port, eth_dst=dst)
# verify if we have a valid buffer_id, if yes avoid to send both
# flow_mod & packet_out
if msg.buffer_id != ofproto.OFP_NO_BUFFER:
self.add_flow(datapath, 1, match, actions, msg.buffer_id)
return
else:
self.add_flow(datapath, 1, match, actions)
data = None
if msg.buffer_id == ofproto.OFP_NO_BUFFER:
data = msg.data
In this they check *msg.bufferid*. When will the value of this be
ofproto.OFP_NO_BUFFER:. What is its significance?
If the message has valid bufferid the packetout message is not sent? why
is it so? Please clarify
Thanks and Regards,
Padma V
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