Unfortunately, no. OpenFlow 1.0 doesn't specify this, and I don't think 1.1 does other. A switch vendor may as an extension, but I don't know anything about that.
Sorry to not be of any help there! -- Murphy On Mar 27, 2012, at 8:21 PM, 星言 墨虚 wrote: > Thank you very much. I solved this problem by your way. > > But I have another question. I have written nox module which used as a > router. And I want to create a queue for each port and monitor it. > When the length of the queue is more than a certain limit, the router will > change another way to forward the packet. > So I must let NOX know the status of queue in each port. > I ask ovs dev this question and they said OVS doesn't provide a way to > monitor the length of a queue. > Do you have any good idea to do this? > > Thanks again. > > -- Zhigang Chen > 发件人： Murphy McCauley <[email protected]> > 收件人： 星言 墨虚 <[email protected]> > 抄送： "[email protected]" <[email protected]> > 发送日期： 2012年3月28日, 星期三, 上午 10:51 > 主题: Re: [nox-dev] Some problems about add flow entry to flow table in > openvswitch > > Looking at the wireshark trace, it looks as if the in_port on the match is > getting byte reversed. This is quite possibly a bug in the packing library; > byte ordering in NOX Classic is problematic. > > Try flipping it: > > ofm.match = flow.get_exact_match(); > ofm.match.in_port = htons(ofm.match.in_port); // Swap bytes > > > You might also try turning up the verbosity for Open vSwitch and looking for > messages from it. I won't swear to it, but I'd think there's a decent chance > it would log something if it got a command with an invalid port number. > > -- Murphy > > On Mar 26, 2012, at 11:12 PM, 星言 墨虚 wrote: > >> Dear all, >> >> Sorry to bother you. >> >> I am writing a NOX module whose name is router. It can be use as a router. >> But there are some questions that NOX cannot add flow entry to flow table in >> openvswitch through send_openflow_command. >> >> This is part of my code. >> // set up a new flow >> ofp_action_list act_list; >> ofp_action *act; >> >> act = new ofp_action(); >> act->set_action_dl_addr( OFPAT_SET_DL_DST, ARPTable[RouteEntry. NextIPAddr]); >> act_list.action_list.push_ back(*act); >> act = new ofp_action(); >> act->set_action_output( RouteEntry.outPort, 0); >> act_list.action_list.push_ back(*act); >> >> // set up new flow >> boost::shared_array<uint8_t> of_raw; >> size_t size = sizeof(ofp_flow_mod)+act_list. mem_size(); >> of_raw.reset(new uint8_t[size]); >> >> of_flow_mod ofm; >> ofm.header = openflow_pack::header(OFPT_ FLOW_MOD, size); >> ofm.match = flow.get_exact_match(); >> >> ofm.cookie = htonl(0); >> ofm.command = htons(OFPFC_ADD); >> ofm.flags = htons(0); >> ofm.priority = htons(OFP_DEFAULT_PRIORITY); >> ofm.idle_timeout = htons(120); >> ofm.hard_timeout = htons(0); >> ofm.buffer_id = buffer_id; >> >> ofm.pack((ofp_flow_mod*) openflow_pack::get_pointer(of_ raw)); >> act_list.pack(openflow_pack:: get_pointer(of_raw,sizeof(ofp_ flow_mod))); >> >> lg.dbg("Install flow entry %s with %zu actions", >> flow.to_string().c_str(), act_list.action_list.size()); >> >> send_openflow_command( datapath_id, of_raw, false); >> >> I run this code in nox(ip: 192.168.0.1) and send packet from host(ip: >> 192.168.57.1) to terminal(ip: 10.0.0.1), then nox show that flow has been >> installed successfully, packet has also been sent to terminal successfully >> and wiresharek can capture the OFP packet too, but openvswitch cannot add >> this flow to flow table. >> >> The attachment is capture file from wireshark. >> >> Thanks! >> >> >> <packet> > > >
