Hi, Allen On 2014年12月24日 21:04, Allen wrote: > Hello, > > > > I encountered a problem that the DSCP_REMARK of Meter_Band_Type doesn’t work. > > > > I was set the rate=1M and prec_level=3 in OFPMeterBandDscpRemark of bands and > test by iperfdup 2M src dst in Mininet .However,when I am parsing the packets > by wireshark,I found the dscp still keep the original value(ip_dscp=11).I > can’t see any change.
OFspec 1.3.4 says: The prec_level field indicates by which amount the drop precedence of the packet should be increased if the band is exceeded. This band increases the encoded drop precedence by this amount, not the raw DSCP value ; it always result in a valid DSCP value, and DSCP values that do not encode a drop precedence are not modified. I think that there is a need to modify the setting of prec_level(now 3) and DSCP value of the test packet(now 11). For example, if you set these values as follows, bands = [parser.OFPMeterBandDscpRemark(rate=1000, burst_size=10, prec_level=1)] DSCP value of the test packet: 18 (AF21) Then,if the band is exceeded, DSCP values will remark to 20(AF22). thanks > > > > Partial code: > > 1: > > bands = [parser.OFPMeterBandDscpRemark(rate=1000, burst_size=10, > prec_level=3)] > > meter_mod= parser.OFPMeterMod(datapath=datapath, command=ofproto.OFPMC_ADD, > > flags=ofproto.OFPMF_KBPS, meter_id=1, > bands=bands) > > datapath.send_msg(meter_mod) > > 2: > > actions= [parser.OFPActionOutput(out_port)] > > match = parser.OFPMatch(in_port=in_port, > eth_dst=dst,ip_proto=17,eth_type=0x0800) > > self.modify_meter(datapath, match,actions) > > 3: > > def modify_meter(self, datapath, match,actions): > > ofproto = datapath.ofproto > > parser = datapath.ofproto_parser > > inst = [parser.OFPInstructionMeter(meter_id=1), > > parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,actions)] > > mod = parser.OFPFlowMod(datapath=datapath, command=ofproto.OFPFC_ADD, > > match=match, instructions=inst) > > datapath.send_msg(mod) > > > > Environment:Ubuntu 12.04+Ryu+Mininet+Ofsoftswitch13 > > > > Thanks > > > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming! The Go Parallel Website, > sponsored by Intel and developed in partnership with Slashdot Media, is your > hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials and more. Take a > look and join the conversation now. http://goparallel.sourceforge.net > > > > _______________________________________________ > Ryu-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ryu-devel > ------------------------------------------------------------------------------ Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net _______________________________________________ Ryu-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ryu-devel
