[ns] Is FTP traffic over TCP connection uses always the same route?

[Dr. Mohamed Ben Othman]

Dear all,

 

I have a topology of 6 nodes: a src, dst and 4 connected routers:

Src connected to r1

Dst connected to r4

 

r1 connected to r2 and r3

r2 connected to r4

r3 connected to r4

 

            Src ---- r1 --------r2

                       |           |

                       R3-------r4-------dst

 

I sent traffic from src to dst and monitored the different queues. The
problem is that the traffic always passes through r1, r2 and then r4.

The queue of r3 is always empty.

I tried to modify the queues sizes, the delay etc but I didn't succeed.

I thought that TCP connection may take more than one route and the traffic
passes via all possible routes.

Can anyone help me.

Thank you.

Mohamed ben Othman