Hi, i'm trying to make speed tests on linux with two gigabit ethernet interfaces and with the iperf program. actually i want to manage those tests with only one machine. the linux box has two gigabit interfaces, which is connected to a switch. the actual network settings is the follows: eth0: 10.0.0.1 netmask 255.255.255.0 eth1: 10.0.1.1 netmask 255.255.255.0 the route table is the follows: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.0.0 * 255.255.255.0 U 0 0 0 eth0 10.0.1.0 * 255.255.255.0 U 0 0 0 eth1 loopback * 255.0.0.0 U 0 0 0 lo i can ping the two ip from an another machine, works well. but i cant use another pc for my tests, i must use only one (with two iface). with the following commands i try to run the speed tests: # start the iperf server iperf -B 10.0.0.1 -D -s # start the iperf client iperf -B 10.0.1.1 -c 10.0.0.1 if you are not familiar with the iperf, that is for testing network's speeds. iperf can be used in two modes: client and server. the server accepts connections from the client, and the data will go through the network (if you use two computers) to test the network's speed. my iperf start parameter meanings the follows: create a listen socket on ip 10.0.0.1 for the server and for the client: use the 10.0.1.1 ip address as the src ip and conncet to the 10.0.0.1 every time i run this program, i got 4.5g/s bandwith, which is too fast for my gigabit ether card :) unfortunately the packets go through the loopback interface (checked with tcpdump). i think that is not a iperf related problem, just a routing mistake. how can i manage to the packets go through the ethernet interfaces? thanks, Gyorgy Kovacs __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
