Loading the ‘pktgen’ module on Ubuntu Server

kernel-modules

I would like to enable and use the pktgen module on Ubuntu Server. I have enabed the module by adding a line containing 'pktgen' to the /etc/modules file. After rebooting it seems that the module is successfully loaded because the directory /proc/net/pktgen exists.

However when trying to run the first sample I get these errors:

root@ubuntu:~# bash ./pktgen.conf-1-1 
Removing all devices
Adding eth4
Setting max_before_softirq 10000
Configuring /proc/net/pktgen/eth4
./pktgen.conf-1-1: line 9: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
./pktgen.conf-1-1: line 9: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
./pktgen.conf-1-1: line 9: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
./pktgen.conf-1-1: line 9: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
./pktgen.conf-1-1: line 9: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
./pktgen.conf-1-1: line 9: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
cat: /proc/net/pktgen/eth4: No such file or directory
Running... ctrl^C to stop
Done

It turns out the script simply unable to write a file to the /proc/net/pktgen directory. When I try this manually it fails as well:

root@ubuntu:~# cd /proc/net/pktgen/
root@ubuntu:/proc/net/pktgen# touch eth4 
touch: cannot touch `eth4': No such file or directory

Can anyone help me make it work?

I'm using Ubuntu version: 2.6.32-21-server.

Fixed
I apologize for keeping this post not up to date. I was able to fix it. If I remember well the cause of the error was that eth4 did not exist, or did not have the 'online' status.

Anyway, it is fixed now.

Best Answer

Does eth4 exist? pktgen doesn't create interfaces.