[ns] DCCP increasing the delay instead of decreasing - Please help..

[maddythedude madan]

Hi All,

I am facing a strange problem with DCCP when I used it over ns2. I have a
setup with two nodes(src and cam) connected to router1(rtr1). rtr1 is
connected to router2(rtr2). Router2(rtr2) connects two other nodes(dst and
cs).

dst -> destination for src
cs -> destination for cam

In my first test(cam.tcl), I used two UDP flows(CBR), one from src and
another cam in order to create congestion and the data is received to dst
and cs. Packet latency from src to dst is is small in this case.

In my Second test(dccp.tcl), I used one UDP flow(CBR) and another DCCP
flow(CBR) from src and cam respectively. I expected the packet latency from
src to dst to go down as the congestion throttling is done by DCCP and the
traffic from cam is throttled to give more space for src-> dst traffic. But
in reverse, the delay is increasing. It could be issue with my code or
understanding too.

Could you please help in this regard?