Hi, On 2014年11月12日 08:51, lbo.xidian wrote: > Hi, > I want to modify the dscp field of each TCP flow at first and forward it > base on the dscp field, and I try to use openflow pipeline processing to > realize this idea. The related program which I used in below: > //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// > # for TCP flows, modify dscp field > table_id = 1 > priority = 43 > match = parser.OFPMatch(eth_type=0x0800, > in_port=inpot, ipv4_dst=dstip, ip_proto=6) > actions = [] > actions.append(parser.OFPActionSetField(ip_dscp=1)) > instructions = [] > > instructions.append(parser.OFPInstructionActions(ofproto.OFPIT_WRITE_ACTIONS, > actions)) > instructions.append(parser.OFPInstructionGotoTable(2)) > self.add_flow(datapath,table_id, priority, match, > instructions)
Which OpenFlow switch do you use? If you use OVS, OFPIT_WRITE_ACTIONS is NOT supported in OVS. So you need to use OFPIT_APPLY_ACTIONS instead. For more details, please refer to the Ryu-Book. http://osrg.github.io/ryu-book/en/html/openflow_protocol.html#instruction > > # forwarding > table_id2 = 2 > priority2 = 42 > match1 = parser.OFPMatch(eth_type=0x0800, > in_port=inpot, ipv4_dst=dstip) > actions1 = [parser.OFPActionOutput(outpot)] > instructions1 = > [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions1)] > self.add_flow(datapath, table_id2, priority2, > match1, instructions1) > > def add_flow(self, datapath, table_id, priority, match, instructions, > buffer_id=None): > datapath = datapath > ofproto = datapath.ofproto > parser = datapath.ofproto_parser > cookie = cookie_mask = 0 > table_id = table_id > idle_timeout = 60 > hard_timeout = 120 > priority = priority > instructions = instructions > buffer_id = ofproto.OFP_NO_BUFFER > match = match > if buffer_id: > mod = parser.OFPFlowMod(datapath = datapath, > cookie = cookie, > cookie_mask = cookie_mask, > table_id = table_id, > command = ofproto.OFPFC_ADD, > idle_timeout = idle_timeout, > hard_timeout = hard_timeout, > priority = priority, > buffer_id = buffer_id, > match = match, > instructions = instructions) > else: > mod = parser.OFPFlowMod(datapath = datapath, > cookie = cookie, > cookie_mask = cookie_mask, > table_id = table_id, > command = ofproto.OFPFC_ADD, > idle_timeout = idle_timeout, > hard_timeout = hard_timeout, > priority = priority, > match = match, > instructions = instructions) > datapath.send_msg(mod) > ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// > I find that the flow table with 'priority = 43' (modify dscp field > action) can't install successful, but the flow table with 'priority = 42' > (forward action) install successful. However, there is no packets received > in testing ping reachability for each host pair. When I just use the forward > function, all the packets in testing ping reachability are received. I don't > know how to deal with this issue, can you give me some help? > Any help would be appreciated! Thank you very much. > Regards, > Bo Liu > > > > > > > ------------------------------------------------------------------------------ > Comprehensive Server Monitoring with Site24x7. > Monitor 10 servers for $9/Month. > Get alerted through email, SMS, voice calls or mobile push notifications. > Take corrective actions from your mobile device. > http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk > > > > _______________________________________________ > Ryu-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ryu-devel > ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk _______________________________________________ Ryu-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ryu-devel
