Hy… The links were useful but still I am getting this same buffer error.. I tried to change buffer id to 0XFFF…
but no luck in my controller I am creating separate object for every switch … I know this error might have some reason for this.. but now I cannot change my initial logic so any ideas to resolve this error… ?? Thanks MuhammAd On Nov 13, 2013, at 3:15 PM, Amer <amer7...@hotmail.com> wrote: > Hello, > > You can use: > 1. Broadcast something as following > If match.dl_type = packet.ARP : > match.src=Packet.src > match.dst=packet.dst > action = FLOOD > > 2. Set the ARP in each for each hosts using new version of mininet > check this post in mininet archive > https://mailman.stanford.edu/pipermail/mininet-discuss/2013-October/003258.html > > > 3. Read MAC addresses from a file > > http://pieknywidok.blogspot.com/2012/08/arp-and-ping-in-pox-building-pox-based.html?m=1 > > 4. Learn ARP/MAC address > this how to learn MAC and can be used to respond to ARP if coupled with > previous code > > http://lists.noxrepo.org/pipermail/pox-dev-noxrepo.org/2013-November/001190.html > > I hope this is helpful > > Thanks regards, > Amer > Sent from my iPhone > > On ١٣/١١/٢٠١٣, at ١١:١٣ م, Muhammad Furqan Gagan <furqan.ga...@gmail.com> > wrote: > >> After implementing my this ARP code in my controller I am recieving this >> error: >> >> ERROR:openflow.of_01:[00-00-00-00-00-03 4] OpenFlow Error: >> [00-00-00-00-00-03 4] Error: header: >> [00-00-00-00-00-03 4] Error: version: 1 >> [00-00-00-00-00-03 4] Error: type: 1 (OFPT_ERROR) >> [00-00-00-00-00-03 4] Error: length: 76 >> [00-00-00-00-00-03 4] Error: xid: 117 >> [00-00-00-00-00-03 4] Error: type: OFPET_BAD_REQUEST (1) >> [00-00-00-00-00-03 4] Error: code: OFPBRC_BUFFER_EMPTY (7) >> [00-00-00-00-00-03 4] Error: datalen: 64 >> [00-00-00-00-00-03 4] Error: 0000: 01 0e 00 58 00 00 00 75 00 00 00 00 00 >> 03 00 00 ...X...u........ >> [00-00-00-00-00-03 4] Error: 0010: 00 00 00 02 00 00 00 00 00 01 ff ff 00 >> 00 08 06 ................ >> [00-00-00-00-00-03 4] Error: 0020: 00 01 00 00 0a 00 00 02 0a 00 00 01 00 >> 00 00 00 ................ >> [00-00-00-00-00-03 4] Error: 0030: 00 00 00 00 00 00 00 00 00 00 00 0a 00 >> 1e 80 00 ……………. >> >> Any ideas how to overcome? >> >> Thanks >> >> Muhammad >> >> On Nov 13, 2013, at 1:03 PM, Muhammad Furqan Gagan <furqan.ga...@gmail.com> >> wrote: >> >>> I have implemented this code to handle ARP.. is it ok ? I am not sure about >>> that.. need your comments please >>> >>> a= packet.find('arp') >>> if a: >>> if a.prototype == arp.PROTO_TYPE_IP: >>> if a.hwtype == arp.HW_TYPE_ETHERNET: >>> if a.protosrc != 0: >>> if a.protosrc in arp_tale: >>> if a.hwsrc == True: >>> Mac = EthAddr(a.hwsrc) >>> arp_table[a.protosrc] = Mac: >>> >>> >>> if a.opcode == arp.REQUEST: >>> # Maybe we can answer >>> >>> if a.protodst in arp_table: >>> r = arp() >>> r.hwtype = a.hwtype >>> r.prototype = a.prototype >>> r.hwlen = a.hwlen >>> r.protolen = a.protolen >>> r.opcode = arp.REPLY >>> r.hwdst = a.hwsrc >>> r.protodst = a.protosrc >>> r.protosrc = a.protodst >>> Mac = arp_table[a.protodst] >>> >>> Mac = _dpid_to_mac(dpid) >>> r.hwsrc = Mac >>> e = ethernet(type=packet.type, src=_dpid_to_mac(dpid), >>> dst=a.hwsrc) >>> e.payload = r >>> log.info("%s answering ARP for %s" % (dpid_to_str(dpid), >>> str(r.protosrc))) >>> msg = of.ofp_packet_out() >>> msg.data = e.pack() >>> msg.actions.append(of.ofp_action_output(port = >>> of.OFPP_IN_PORT)) >>> msg.in_port = inport >>> event.connection.send(msg) >>> >>> else: >>> msg = of.ofp_packet_out() >>> msg.actions.append(of.ofp_action_output(port = >>> of.OFPP_FLOOD)) >>> msg.data = event.ofp >>> event.connection.send(msg.pack()) >>> >>> Thanks >>> >>> Muhammad >>> >>> On Nov 13, 2013, at 12:56 PM, Murphy McCauley <murphy.mccau...@gmail.com> >>> wrote: >>> >>>> Durga is spot on, but I'll throw in another couple things you might look >>>> at: >>>> forwarding.l3_learning handles ARP >>>> proto.arp_helper attempts to make it easier to work with ARP >>>> >>>> (Oh, and misc.arp_responder has moved to proto.arp_responder in newer >>>> versions.) >>>> >>>> -- Murphy >>>> >>>> On Nov 13, 2013, at 2:06 AM, durga <c.vijaya.du...@gmail.com> wrote: >>>> >>>>> >>>>> hello, >>>>> Seems pox supports packet type as arp, can be found here (pox / pox / lib >>>>> / packet / arp.py ), as well as may be you can get some help by refering >>>>> to the below example. >>>>> pox / pox / misc / arp_responder.py >>>>> >>>>> Cheers! >>>>> Durga >>>>> >>>>> >>>>> >>>>> On Wed, Nov 13, 2013 at 8:35 PM, Muhammad Furqan Gagan >>>>> <furqan.ga...@gmail.com> wrote: >>>>> Hello, >>>>> >>>>> Any one know how to handle ARP request in controller? >>>>> >>>>> Thanks >>>>> >>>>> Muhammad >>>>> >>>> >>> >>
