Dear sir,
I'm using ryu to generate LLDP packets and send them out of all switch
ports using this code:
> def send_lldp(self, datapath):
> ports = self.dpset.get_ports(datapath.id)
> for port in ports:
> pkt = packet.Packet()
> pkt.add_protocol(ethernet.ethernet(
> ethertype=ethernet.ether.ETH_TYPE_LLDP,
> dst="01:80:C2:00:00:02",
> src=port.hw_addr
> ))
> pkt.add_protocol(lldp.lldp(
> [
>
> lldp.ChassisID(chassis_id=dpid_to_str(datapath.id).encode(),
subtype=lldp.ChassisID.SUB_CHASSIS_COMPONENT),
> lldp.PortID(port_id=port.name,
subtype=lldp.PortID.SUB_INTERFACE_NAME),
> ]
> ))
> try:
> self._send_packet(datapath, port.port_no, pkt)
> except Exception as e:
> print(str(e))
I've added a rule to forward packets to the controller in case of LLDP
match:
> parser.OFPMatch(
> eth_type=ethernet.ether.ETH_TYPE_LLDP
> )
but when the packets are received by the controller as PacketIn messages
I'm unable to get LLDP headers. this is the code I'm using for PacketIn:
> @set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
> def _packet_in_handler(self, ev):
> msg = ev.msg
> datapath = msg.datapath
> port = msg.match['in_port']
> pkt = packet.Packet(msg.data)
> self.logger.info("packet-in %s" % (pkt,))
> pkt_ethernet = pkt.get_protocol(ethernet.ethernet)
> if not pkt_ethernet:
> return
> pkt_lldp = pkt.get_protocol(lldp.lldp)
> if pkt_lldp:
> self._handle_lldp(datapath, port, pkt_ethernet, pkt_lldp)
pkt_lldp is None and the value of pkt.protocols is:
>
[ethernet(dst='01:80:c2:00:00:02',ethertype=35020,src='d2:7d:8f:dd:c8:bd'),
b'\x02\x11\x010000ba8f9ab84c4c\x04\x07\x05p1-sw2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00']
Best Regards,
Maged
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