Network Performance test - server and client on same computer

[tmaimon]

Hello All,

I'm trying to do network testing using iperf or netperf tools, and I'd like to be able to run both the client and server on the same computer.

The problem is that the packets sent internally route (in the kernel) and not going out to the out side world (physical layer).

Does some one have an example how to work with iperf or netperf tools with the same computer with two Ethernet device that connecting to device i need to test?

Thanks in advance!!!

[Rubberman]

You will need dual network adapters (cards/nics) and set up your routing tables accordingly so that packets are sent outside to the network router back to the other nic. You might be able to do this with one nic with a virtual nic, but otherwise the issues are the same.

[Lazydog]

First question is what is your goal? What are you trying to prove or dis-prove?

[tmaimon]

Thanks a lot for the answers,

i need it to test a Gigabit Ethernet Switch (with 24 Ethernet ports) the way i do it now is to connect from "computer 1 (run netserver)" to the first Ethernet port in the switch the other ports are connected one to each other and the last Ethernet port connected to "computer 2 (run netperf)".

i will like to do the same test only with one computer (with two Ethernet ports), the problem is when i have using Netperf/iperf (even if i do ping before) probably in the kernel there is a routing between the two ports and no packets going out to the real world.

"You will need dual network adapters (cards/nics) and set up your routing tables accordingly so that packets are sent outside to the network router back to the other nic. You might be able to do this with one nic with a virtual nic, but otherwise the issues are the same."

i have two nics, but i cat send outside packets from one nic to the other by using Netperf/iperf, i have already configure different subnet to each of the nic's and also try to use VLAN's the result was the same.

do you have example how to do it?

Thanks in advance

and HAPPY NEW YEAR!!!

[Lazydog]

Look at the following and let me know if this is helpful.

Force local ip traffic to an external interface

[Rubberman]

Look at the following and let me know if this is helpful.

Force local ip traffic to an external interface

Good link LD. I knew the general methods, but not specifically how to do it. Thanks.

[Lazydog]

Same here that is why I went on the search after I understood more what the OP was looking for.