On Mon, 21 Apr 2014 15:12:56 +1200
Karthik Sharma <[email protected]> wrote:
> I have copied the function send_lldp_packet() from
> *ryu/topology/switches.py.*The only addition that I have done to the
> function is to add a print statement.Now If I were to run the controller
> using
>
> * sudo ryu-manager --observe-links ryu/app/simple_switch.py*
>
> and
>
> make the mininet topology connect to the controller I don't see the print
> *('send_lldp_packet')* coming on the screen.
Just copying send_lldp_packet() doesn't anything. You also need the
caller, etc. If you want to do l2 switch feature with toplogy feature,
I would recommend you to extend ryu/topology/ instead of simple_switch
> I was told that the topology is cached in some structure by RYU.It would be
> great if someone could point me to the structure?
>
> def send_lldp_packet(self, port):
> try:
> port_data = self.ports.lldp_sent(port)
> except KeyError as e:
> # ports can be modified during our sleep in self.lldp_loop()
> # LOG.debug('send_lldp: KeyError %s', e)
> return
> if port_data.is_down:
> return
>
> print('send_lldp_packet')
> dp = self.dps.get(port.dpid, None)
> if dp is None:
> # datapath was already deleted
> return
>
> # LOG.debug('lldp sent dpid=%s, port_no=%d', dp.id, port.port_no)
> # TODO:XXX
> if dp.ofproto.OFP_VERSION == ofproto_v1_0.OFP_VERSION:
> actions = [dp.ofproto_parser.OFPActionOutput(port.port_no)]
> dp.send_packet_out(actions=actions, data=port_data.lldp_data)
> elif dp.ofproto.OFP_VERSION >= ofproto_v1_2.OFP_VERSION:
> actions = [dp.ofproto_parser.OFPActionOutput(port.port_no)]
> out = dp.ofproto_parser.OFPPacketOut(
> datapath=dp, in_port=dp.ofproto.OFPP_CONTROLLER,
> buffer_id=dp.ofproto.OFP_NO_BUFFER, actions=actions,
> data=port_data.lldp_data)
> dp.send_msg(out)
> else:
> LOG.error('cannot send lldp packet. unsupported version. %x',
> dp.ofproto.OFP_VERSION)
>
> Regards,
> Karthik.
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