Good point. I was thinking I had a check for that. But your point is dead on, as soon as I broke the loop, all was fine.
Guess I need a spanning tree. Thanks. Brian > On Oct 21, 2014, at 8:18 PM, Murphy McCauley <murphy.mccau...@gmail.com> > wrote: > > If they're in a ring and you therefore have a loop... if you're not careful, > you'll get looping packets, which can certainly overwhelm the network and > switches, exhaust buffers, and starve the control channel if it's on the same > network. > > -- Murphy > >> On Oct 21, 2014, at 5:15 PM, Brian Krisler <bkris...@bbn.com> wrote: >> >> I started to remove switches and discovered one was causing issues. I have >> not yet investigated why. >> >> What I am trying to accomplish is a proof of concept with 4 switches in a >> ring topology. Two of the four switches are connected to different subnets. >> So 192.168.0.x is connected to switch1 and 192.168.1.x is connected to >> switch3. >> >> All switches are controlled by a single controller, and the goal is to be >> able to dynamically reroute traffic between the subnets within the ring >> based on higher-level rules passed into the controller. >> >> So in normal traffic flows from switch1 to switch3, a rule can tell the >> controller to route switch1 to switch2 to switch4, for example. >> >> I basically have it working, I am now trying to get statistics setup to >> report on existing traffic flows. >> >> Brian >> >> >> >>> On Oct 21, 2014, at 5:40 PM, Murphy McCauley <murphy.mccau...@gmail.com> >>> wrote: >>> >>> Maybe you could start off by describing your setup a bit. What is your >>> network like, what POX components are you running, what are you trying to >>> accomplish, etc.? >>> >>> -- Murphy >>> >>>> On Oct 21, 2014, at 11:16 AM, Brian Krisler <bkris...@bbn.com> wrote: >>>> >>>> Hi, >>>> >>>> In my controller, I keep getting the error messages below, >>>> or I get a stream of “DEBUG:openflow.of_01:deferred sender is sending!” >>>> messages. >>>> >>>> I have now reduced my handle_PacketIn method to be: >>>> >>>> def handle_PacketIn(self, event): >>>> packet = event.parsed >>>> msg = of.ofp_packet_out(data = event.ofp) >>>> msg.actions.append(of.ofp_action_output(port = of.OFPP_NORMAL)) >>>> event.connection.send(msg) >>>> return None >>>> >>>> And I still get this issues. How do I figure out the cause? >>>> >>>> Thanks >>>> >>>> Brian >>>> >>>> >>>> >>>> ERROR:openflow.of_01:[08-00-27-21-24-cc 6] OpenFlow Error: >>>> [08-00-27-21-24-cc 6] Error: header: >>>> [08-00-27-21-24-cc 6] Error: version: 1 >>>> [08-00-27-21-24-cc 6] Error: type: 1 (OFPT_ERROR) >>>> [08-00-27-21-24-cc 6] Error: length: 36 >>>> [08-00-27-21-24-cc 6] Error: xid: 53974 >>>> [08-00-27-21-24-cc 6] Error: type: OFPET_BAD_REQUEST (1) >>>> [08-00-27-21-24-cc 6] Error: code: OFPBRC_BUFFER_UNKNOWN (8) >>>> [08-00-27-21-24-cc 6] Error: datalen: 24 >>>> [08-00-27-21-24-cc 6] Error: 0000: 01 0d 00 18 00 00 d2 d6 00 00 05 2a 00 >>>> 01 00 08 |...........*....| >>>> [08-00-27-21-24-cc 6] Error: 0010: 00 00 00 08 ff fa 00 00 >>>> |........ | >>>> ERROR:openflow.of_01:[08-00-27-21-24-cc 6] OpenFlow Error: >>>> [08-00-27-21-24-cc 6] Error: header: >>>> [08-00-27-21-24-cc 6] Error: version: 1 >>>> [08-00-27-21-24-cc 6] Error: type: 1 (OFPT_ERROR) >>>> [08-00-27-21-24-cc 6] Error: length: 36 >>>> [08-00-27-21-24-cc 6] Error: xid: 53975 >>>> [08-00-27-21-24-cc 6] Error: type: OFPET_BAD_REQUEST (1) >>>> [08-00-27-21-24-cc 6] Error: code: OFPBRC_BUFFER_UNKNOWN (8) >>>> [08-00-27-21-24-cc 6] Error: datalen: 24 >>>> [08-00-27-21-24-cc 6] Error: 0000: 01 0d 00 18 00 00 d2 d7 00 00 05 2b 00 >>>> 03 00 08 |...........+....| >>>> [08-00-27-21-24-cc 6] Error: 0010: 00 00 00 08 ff fa 00 00 >>>> |........ | >>>> ERROR:openflow.of_01:[08-00-27-21-24-cc 6] OpenFlow Error: >>>> [08-00-27-21-24-cc 6] Error: header: >>>> [08-00-27-21-24-cc 6] Error: version: 1 >>>> [08-00-27-21-24-cc 6] Error: type: 1 (OFPT_ERROR) >>>> [08-00-27-21-24-cc 6] Error: length: 36 >>>> [08-00-27-21-24-cc 6] Error: xid: 53976 >>>> [08-00-27-21-24-cc 6] Error: type: OFPET_BAD_REQUEST (1) >>>> [08-00-27-21-24-cc 6] Error: code: OFPBRC_BUFFER_UNKNOWN (8) >>>> [08-00-27-21-24-cc 6] Error: datalen: 24 >>>> [08-00-27-21-24-cc 6] Error: 0000: 01 0d 00 18 00 00 d2 d8 00 00 05 2c 00 >>>> 01 00 08 |...........,....| >>>> [08-00-27-21-24-cc 6] Error: 0010: 00 00 00 08 ff fa 00 00 >>>> |........ | >
