network interface wrong!

[Massimo O. <ono...@vi...>]

Hi all !

I am  using Iperf measurement tool in my network, it is like this:


                                                                                                                          |
                                            |                                        |                                  eth3                                                                         
                                  -----NODE1 eth1----------------------- NODE2 ---------------- eth2 NODE3-----
                                            |                                        |                                    |                            

                            
 and each router has four network interrfaces. I want to send UDP traffic from node1 to node3 through node2.

I start Iperf_server in node3:

node3 > Iperf -s -u

and then Iperf_client in node1:

node1 > Iperf  -c eth2_IP_address -u

In node1 Iperf tells me :

[3]  local  eth1_IP_address connected with local  eth2_IP_address 

instead in node3 Iperf tells me:

[3]  local eth3_IP_address connected with local eth1_IP_address but  Iperf_server does not receive  

datagrams !!

Why  does Iperf_server listen on eth3 network interface ?

Thanks in advance !