Hi everybody! Hope you going well. I need a little information and I think you are those who can answer it easily. First heres are my setup.

Data serveur running on CentOS using a Gigabit LAN to a Gigabit switch. The switch has another Oracle Linux server connected to him but it don't matters.

At the moment, if my father downloads a movie from his computer from the data server, he'll receive a rate of 100mb/s but if I start downloading a movie at the same time, we'll both have 50mb/s

My question is, if i install another gigabit lan in the server, how do i configure it to do load balancing between the two cards (i know it's possible)

So thank you so much for your answer, I hope you'll be able to help !

You can bond the two interfaces, however your Gb switch also needs to cope with bonding and "consumer grade" home switches generally don't do it.

The switch is http://www.amer.com/products/180-sgrd24.aspx however it's not manageable some of people a know told me that it's possible inside the Linux without caring about the switch only with some configurations

Well you've nothing to lose by trying the regular bonding within CentOS and seeing if it works. Just remember to make copies of your existing network configs before playing. http://www.howtoforge.com/network_card_bonding_centos

I would strongly suggest only trying this if you have physical access to the server, just incase!

Thank you for your answer, my both server de data server and the poweredge are connected to a kvm switch so i can monitor them directly. I'll I try it as soon as I'm home, and only to know, what do you think of my switch (for a home use) ? was it a good move ?

And also, which mode you suggest (I only want to get a better bandwidth when 2 computer are downloading files from the server)

Seems like a nice bit of kit, assuming you've that many machines that need wired connections