Test ethernet connection

TroelsSmit · 02-08-2006, 04:19 AM

Hi all,

I'm developing an embedded product running linux.
The product has two ethernet netcards and two switches on the main board.

During production the ethernet connection should be tested, so I would like to connect the two switches with a patch cable and send traffic from one ethernet card to the other.

To do this I tried to do the following:

Code:

ifconfig eth0 10.2.0.3 netmask 255.255.255.0
ifconfig eth1 10.2.0.4 netmask 255.255.255.0

route delete (all)

route add -host 10.2.0.4 eth0
route add -host 10.2.0.3 eth1

then I restart inetd.

then I start "tcpdump" on eth0 on a terminal

on a different terminal I try:

telnet 10.2.0.4

-> then it just says "trying ..." and nothing happens
-> on the tcpdump I can see that no packages are generated (it is in promiscius mode)

Does anyone know how to send ethernet traffic from one internal ethernet card to another?

Thanks

halvy · 02-08-2006, 09:13 PM

maybe use a crossover cable, but that is what hubs/routers do.

or am i missing something obvious (it's getting late

TroelsSmit · 02-09-2006, 02:10 AM

Connecting two switches is normally done with a patch cable.