how to find out duplex mode..?

[mw_4]

Hi,
how can I find out it ?
and what am i supposed to do to set full duplex mode at interfaces next linux reboot?

[I_M · Accepted solution]

Hi

if you are using mii supported NIC, you can use mii-tool to check and set the duplex.

For example, Intel Pro/100 ,there are 2 drivers, eepro100 & e100.
Both driver has option to set the connection speed and duplex.

http://www.scyld.com/network/eepro100.html
or
ftp://aiedownload.intel.com/df-support/2896/ENG/e100.txt

Other NIC has their own way to set the speed/duplex by driver.
Check the developer's page of the driver or inside of the source for more information.

And make sure you set your HUB/Switch port negtiation properly.

Good luck

[U.SivaKumar_2]

Hi,
download ethtool from this link. it will change the speed settings .
http://sourceforge.net/project/showfiles.php?group_id=3242&release_id=95787

regards,
U.SivaKumar

[mw_4]

this tool can change speed setting automatically?
just install and execute?
that is fit for linux?
can you describe that how it is performed..?

[oiram]

Hi,

To set up the speed of yout target you should add the options to the module in the file /etc/modules.conf. For example, to force 100MB full-duplex on an eepro100MB driver, make sure that the following lines have been added to /etc/modules.conf

Alias eth0 eepro100
Options eepro100 options=48


Check the driver's documentation for how to set up the options

Regards.

[U.SivaKumar_2]

Hi,
please look at this link.
http://linuxcommand.org/man_pages/ethtool8.html

regards,
U.SivaKumar