Hi guys again :) Sorry for too much questions :)
When I tried to add the scenario above ( broadcasting + cbr traffic flow) the dst_addr_ -1 didn't work anymore, the simulation finishes but the trace file ends incomplete. For my luck, i tried, i don't know why, to set dst_addr_ -2 and works! In the trace shown n1 sends a broadcast, n2 sends its cbr traffic and n3 receive both flows. But when i tried to add a forthy node to receive the broadcasting, it didn't appears in the trace file. i'm trying to solve this problem. So, why dst_addr_ -2 work? 2012/5/2 Paulo Robson S. F. <robson.paulo...@gmail.com> > Hi, > > I forgot to show this page: > http://www.math.unipd.it/~cpalazzi/fastbroadcast.html > what do you think of this broadcast agent? > > Att > > > 2012/5/2 Paulo Robson S. F. <robson.paulo...@gmail.com> > > Hi guys, thanks for the feedback. >> >> Alysson, >> >> >> The Agent PBC is a broadcast but is only ping, I tested it before and is >> no good for me. >> >> I dont understand this agent Flooding at all, I need to use it? >> >> Are you saying the only way to broadcast is to use one of those agents? >> My way is wrong? >> >> Another question, >> Is possible the follow scenario? : one node(n1) broadcasting and two >> another(n2 and n3) nodes as a cbr traffic flow like n2 ---> n3 and n3 >> receiving the broadcasting packets of n1 and the traffic of n2? >> >> Thank you! >> >> >> >> 2012/5/2 Alysson Oliveira <lssn.olive...@gmail.com> >> >>> Hi, >>> >>> You can see it on ns-2.34/tcl/ex/wireless-flooding.tcl and >>> ns-2.34/tcl/ex/802.11/broadcast_validation.tcl witch uses a specific >>> broadcast agent. >>> >>> Further details in ns-2.34/common/packet.h on lines 676 and 677: >>> init(p); // Initialize bits_[] >>> (HDR_CMN(p))->next_hop_ = -2; // -1 reserved for IP_BROADCAST >>> (HDR_CMN(p))->last_hop_ = -2; // -1 reserved for IP_BROADCAST >>> >>> Regards, >>> Alysson Oliveira >>> >>> >>> 2012/5/2, Frank Wetzels <frank.wetz...@cwi.nl>: >>> > >>> > Hi, >>> > >>> > I have no solution for you in NS2. However, I have a remark on your >>> > address/port choice. >>> > I guess that by choosing -1, you fill the address field with >>> 255.255.255.255 >>> > as IP address >>> > in dotted decimal notation? The port number choice of 0 is a bit >>> strange. >>> > Although you are using IP broadcast >>> > you - strictly speaking - still need a legitimate port number. Indeed, >>> you >>> > choose a particular protocol by choosing >>> > the port address. As an example, DHCP uses IP broadcast initially >>> based on >>> > UDP67 / UDP68. >>> > >>> > Regards, >>> > Frank >>> > >>> > On May 1, 2012, at 5:36 AM, Paulo Robson S. F. wrote: >>> > >>> >> >>> >> Hi, >>> >> >>> >> I want to broadcast a packet using an udp agent. I found some >>> solutions >>> >> at >>> >> this maillist but >>> >> neither satisfactory. >>> >> >>> >> I just want to send broadcast packet from 1 node to another 2 nodes in >>> >> his >>> >> range. My idea was >>> >> change the dst ip to -1 and dst port to 0 because i saw somewhere >>> that is >>> >> the way to broadcast. >>> >> >>> >> I'm using the 802.11Ext model of MAC, the new module of the NS 2.34 >>> >> >>> >> Well, I made this way: >>> >> >>> >> set udp0 [new Agent/UDP] >>> >> $ns attach-agent $node $udp0 >>> >> set cbr2 [new Application/Traffic/CBR] >>> >> >>> >> $cbr2 set packetSize_ 128 >>> >> $cbr2 set interval_ 0.015 >>> >> $cbr2 set random_ 1 >>> >> $cbr2 set maxpkts_ 1000 >>> >> >>> >> $cbr2 attach-agent $udp0 >>> >> >>> >> #to broadcast i used this: >>> >> $udp0 set dst_addr_ -1 >>> >> $udp0 set dst_port_ 0 >>> >> >>> >> In the trace file seems to be right, but i dont know if only this >>> change >>> >> of >>> >> address and port of destination >>> >> is indeed a broadcast to all neighbors. >>> >> >>> >> First lines of trace file: >>> >> s 0.500000000 _2_ AGT --- 0 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 0] >>> >> [0] >>> >> 0 0 >>> >> r 0.500000000 _2_ RTR --- 0 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 >>> 0] >>> >> [0] >>> >> 0 0 >>> >> s 0.500000000 _2_ RTR --- 0 cbr 148 [0 0 0 0] ------- [2:0 -1:0 32 0] >>> >> [0] >>> >> 0 0 >>> >> s 0.500025000 _2_ MAC --- 0 cbr 176 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [0] 0 0 >>> >> r 0.500546664 _1_ MAC --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [0] 1 0 >>> >> r 0.500546841 _0_ MAC --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [0] 1 0 >>> >> r 0.500571664 _1_ RTR --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [0] 1 0 >>> >> r 0.500571664 _1_ AGT --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 31 >>> >> 0] [0] 1 0 >>> >> r 0.500571841 _0_ RTR --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [0] 1 0 >>> >> r 0.500571841 _0_ AGT --- 0 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 31 >>> >> 0] [0] 1 0 >>> >> s 0.507505094 _2_ AGT --- 1 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 0] >>> >> [1] >>> >> 0 0 >>> >> r 0.507505094 _2_ RTR --- 1 cbr 128 [0 0 0 0] ------- [2:0 -1:0 32 >>> 0] >>> >> [1] >>> >> 0 0 >>> >> s 0.507505094 _2_ RTR --- 1 cbr 148 [0 0 0 0] ------- [2:0 -1:0 32 0] >>> >> [1] >>> >> 0 0 >>> >> s 0.507530094 _2_ MAC --- 1 cbr 176 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [1] 0 0 >>> >> r 0.508051758 _1_ MAC --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [1] 1 0 >>> >> r 0.508051934 _0_ MAC --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [1] 1 0 >>> >> r 0.508076758 _1_ RTR --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [1] 1 0 >>> >> r 0.508076758 _1_ AGT --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 31 >>> >> 0] [1] 1 0 >>> >> r 0.508076934 _0_ RTR --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 32 >>> >> 0] [1] 1 0 >>> >> r 0.508076934 _0_ AGT --- 1 cbr 148 [0 ffffffff 2 0] ------- [2:0 >>> -1:0 >>> >> 31 >>> >> 0] [1] 1 0 >>> >> >>> >> >>> >> Thanks guys >>> >> >>> >> >>> >> Att, >>> >> >>> >> -- >>> >> Paulo Robson SF >>> >> Computação UFC >>> >> Semestre VII >>> > >>> > >>> > >>> >>> >>> -- >>> Alysson Oliveira >>> >> >> >> >> -- >> Paulo Robson SF >> Computação UFC >> Semestre VII >> > > > > -- > Paulo Robson SF > Computação UFC > Semestre VII > -- Paulo Robson SF Computação UFC Semestre VII
