Hello,
I simulated the exactly same scenario with two routing protocols (AOMDV and a modification of AOMDV). When using the modified protocol there is a TCP packet dropped. After the "Retransmission Timeout" of 3 seconds, the packet is send again (time 8.000000000). My problem/question is, why TCP sends the data packet two times (time 8.00382380 and 8.008261611) and not only one time as specified in the simulation script. The standard AOMDV only sends the packet one time. I think this behaviour has something to do with the dropped packet, but I don't understand why. Here are the lines from the trace files: AOMDV ----- s -t 5.000000000 -Hs 0 -Hd -2 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 0.0 -Id 3.0 -It tcp -Il 40 -If 0 -Ii 4 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0 -Po 0 r -t 5.009845349 -Hs 3 -Hd 3 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 3 -Ms 2 -Mt 800 -Is 0.0 -Id 3.0 -It tcp -Il 60 -If 0 -Ii 4 -Iv 28 -Pn tcp -Ps 0 -Pa 0 -Pf 3 -Po 0 s -t 5.009845349 -Hs 3 -Hd -2 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 3.0 -Id 0.0 -It ack -Il 40 -If 0 -Ii 5 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0 -Po 0 r -t 5.011312029 -Hs 0 -Hd 0 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 0 -Ms 1 -Mt 800 -Is 3.0 -Id 0.0 -It ack -Il 60 -If 0 -Ii 5 -Iv 28 -Pn tcp -Ps 0 -Pa 0 -Pf 3 -Po 0 s -t 5.011312029 -Hs 0 -Hd -2 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 0.0 -Id 3.0 -It tcp -Il 1040 -If 0 -Ii 6 -Iv 32 -Pn tcp -Ps 1 -Pa 0 -Pf 0 -Po 0 r -t 5.013263154 -Hs 3 -Hd 3 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 3 -Ms 2 -Mt 800 -Is 0.0 -Id 3.0 -It tcp -Il 1060 -If 0 -Ii 6 -Iv 28 -Pn tcp -Ps 1 -Pa 0 -Pf 3 -Po 0 s -t 5.013263154 -Hs 3 -Hd -2 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 3.0 -Id 0.0 -It ack -Il 40 -If 0 -Ii 7 -Iv 32 -Pn tcp -Ps 1 -Pa 0 -Pf 0 -Po 0 r -t 5.015109835 -Hs 0 -Hd 0 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 0 -Ms 1 -Mt 800 -Is 3.0 -Id 0.0 -It ack -Il 60 -If 0 -Ii 7 -Iv 28 -Pn tcp -Ps 1 -Pa 0 -Pf 3 -Po 0 AOMDV mod. ------------ s -t 5.000000000 -Hs 0 -Hd -2 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 0.0 -Id 3.0 -It tcp -Il 40 -If 0 -Ii 4 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0 -Po 0 The first packet is dropped here !!! s -t 8.000000000 -Hs 0 -Hd -2 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 0.0 -Id 3.0 -It tcp -Il 40 -If 0 -Ii 5 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0 -Po 0 r -t 8.001757125 -Hs 3 -Hd 3 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 3 -Ms 2 -Mt 800 -Is 0.0 -Id 3.0 -It tcp -Il 60 -If 0 -Ii 5 -Iv 28 -Pn tcp -Ps 0 -Pa 0 -Pf 3 -Po 0 s -t 8.001757125 -Hs 3 -Hd -2 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 3.0 -Id 0.0 -It ack -Il 40 -If 0 -Ii 6 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0 -Po 0 r -t 8.003823805 -Hs 0 -Hd 0 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 0 -Ms 1 -Mt 800 -Is 3.0 -Id 0.0 -It ack -Il 60 -If 0 -Ii 6 -Iv 28 -Pn tcp -Ps 0 -Pa 0 -Pf 3 -Po 0 s -t 8.003823805 -Hs 0 -Hd -2 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 0.0 -Id 3.0 -It tcp -Il 1040 -If 0 -Ii 7 -Iv 32 -Pn tcp -Ps 1 -Pa 0 -Pf 0 -Po 0 r -t 8.006174930 -Hs 3 -Hd 3 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 3 -Ms 2 -Mt 800 -Is 0.0 -Id 3.0 -It tcp -Il 1060 -If 0 -Ii 7 -Iv 28 -Pn tcp -Ps 1 -Pa 0 -Pf 3 -Po 0 s -t 8.006174930 -Hs 3 -Hd -2 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 3.0 -Id 0.0 -It ack -Il 40 -If 0 -Ii 8 -Iv 32 -Pn tcp -Ps 1 -Pa 0 -Pf 0 -Po 0 r -t 8.008261611 -Hs 0 -Hd 0 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 0 -Ms 1 -Mt 800 -Is 3.0 -Id 0.0 -It ack -Il 60 -If 0 -Ii 8 -Iv 28 -Pn tcp -Ps 1 -Pa 0 -Pf 3 -Po 0 s -t 8.008261611 -Hs 0 -Hd -2 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 0.0 -Id 3.0 -It tcp -Il 1040 -If 0 -Ii 9 -Iv 32 -Pn tcp -Ps 2 -Pa 0 -Pf 0 -Po 0 r -t 8.010212736 -Hs 3 -Hd 3 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 3 -Ms 2 -Mt 800 -Is 0.0 -Id 3.0 -It tcp -Il 1060 -If 0 -Ii 9 -Iv 28 -Pn tcp -Ps 2 -Pa 0 -Pf 3 -Po 0 s -t 8.010212736 -Hs 3 -Hd -2 -Ni 3 -Nx 1000.00 -Ny 600.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 0 -Ma 0 -Md 0 -Ms 0 -Mt 0 -Is 3.0 -Id 0.0 -It ack -Il 40 -If 0 -Ii 10 -Iv 32 -Pn tcp -Ps 2 -Pa 0 -Pf 0 -Po 0 r -t 8.011879416 -Hs 0 -Hd 0 -Ni 0 -Nx 500.00 -Ny 400.00 -Nz 0.00 -Ne -1.000000 -Nl AGT -Nw --- -CHhops 3 -Ma 46 -Md 0 -Ms 1 -Mt 800 -Is 3.0 -Id 0.0 -It ack -Il 60 -If 0 -Ii 10 -Iv 28 -Pn tcp -Ps 2 -Pa 0 -Pf 3 -Po 0 -- View this message in context: http://old.nabble.com/TCP-send-sduplicate-packet-%21--tp31717056p31717056.html Sent from the ns-users mailing list archive at Nabble.com.
