Hi,
Im having some issues to send a packet out message between 2 ovs. Im have 3
PCs. 2 of them act like an ovs and the third one has the Ryu controller. Im
have a vlan (vid=44) por signal traffic between both ovs and the controller
and a vlan (vid=10) just for transport between both ovs. I also have the 3
PCs physically connected by a Cisco Catalyst 2960 switch. Im figuring out
how to send a packet out from one ovs (172.16.10.10) to the other ovs
(172.16.10.20) without receiving a packet in message first. Now im sending
the packet out in the switch features handler as follows:
Switch features handler:
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
match_miss = parser.OFPMatch()
actions_miss = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
self.add_flow(datapath, 0, match_miss, actions_miss)
match_2 = parser.OFPMatch(in_port=1, eth_type=0x800,
ipv4_dst='172.16.10.20')
actions_out = [parser.OFPActionOutput(port=1)]
self.add_flow(datapath, 1, match_2, actions_out)
#I send the packet out just from one ovs:
if msg.datapath_id == 233669375027733:
p = packet.Packet()
ip = ipv4.ipv4(src='172.16.10.10', dst='172.16.10.20')
p.add_protocol(ip)
p.serialize()
match_out = parser.OFPMatch(in_port=1)
out = parser.OFPPacketOut(datapath=msg.datapath,
buffer_id=ofproto.OFP_NO_BUFFER,
match=match_out, actions=actions_out,
data=p.data)
datapath.send_msg(out)
def add_flow(self, datapath, priority, match, actions):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions)]
mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
match=match, instructions=inst)
datapath.send_msg(mod)
Packet in handler:
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def packet_in_handler(self, ev):
msg = ev.msg
dp = msg.datapath
ofp = dp.ofproto
if msg.reason == ofp.OFPR_TABLE_MISS:
reason = 'TABLE MISS'
elif msg.reason == ofp.OFPR_APPLY_ACTION:
reason = 'APPLY ACTION'
elif msg.reason == ofp.OFPR_INVALID_TTL:
reason = 'INVALID TTL'
elif msg.reason == ofp.OFPR_ACTION_SET:
reason = 'ACTION SET'
elif msg.reason == ofp.OFPR_GROUP:
reason = 'GROUP'
elif msg.reason == ofp.OFPR_PACKET_OUT:
reason = 'PACKET OUT'
else:
reason = 'unknown'
if reason == 'PACKET OUT':
self.logger.debug('OFPPacketIn received: '
'buffer_id=%x total_len=%d reason=%s '
'table_id=%d cookie=%d match=%s ',
msg.buffer_id, msg.total_len, reason,
msg.table_id, msg.cookie, msg.match)
self.logger.debug('DATAPATH ADDRESS:%s', dp.address)
I never recieve a packet in message due o a packet out message. Any
help will be appreciated.
Thanks in advance.
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