How to change Port speed OR Network Interface Speed?
To set a specific speed limit on a Network Interface say 10mbps, edit the file network interface file and set the limit which will make the changes permanent even after a reboot.
Edit the file:
root@server [~]# pico /etc/sysconfig/network-scripts/ifcfg-eth0
Add the following line at the end of the file:
ETHTOOL_OPTS=”speed 10 duplex full autoneg off”
Save the file and restart the network service.
root@server [~]# service network restart
This way you can set the duplex or auto negotiation as well. Once done, you can check the network speed using the ethtool command
root@server [~]# ethtool eth0
Tags: change 100mbps connection to 10mbps, ethtool command to check network speed, how to change Network Interface Speed?, how to change speed on a port?, how to check network interface speed?, how to set 10mbps connection in linux, Network Interface Speed on linux, to set full duplex connection
November 22nd, 2009 at 3:59 am
Hi. I am a long time reader. I wanted to say that I like your blog and the layout.
Peter Quinn
December 23rd, 2011 at 2:46 pm
Thanks for support!
But what’s wrong if I don’t have the file
/etc/sysconfig/network-scripts/ifcfg-eth0 ?
and if i made new one it’s useless
Greg
December 24th, 2011 at 10:26 am
If ifcfg-eth0 isn’t there, then check if the network interface is something else i.e. eth1 in which case the file would be ifcfg-eth1. If the “network-scripts” directory doesn’t exist at all, then you surely should be on Debian OR Ubuntu system in which case, the interface file is /etc/network/interfaces
December 27th, 2011 at 6:42 am
actually I am on Dabian,
the ethtool_opt didn’t work in my interfaces,
so i put ethtool in rc.local, now it works.
thanks a lot.