LINUX LAN COMMANDS

[Chris Chaoman]

I am trying to change lan speeds on a linux server.

dmesg to ascertain the current speed settings

ethtool -s eth0 speed 100 duplex full

The ethtool command did work. Can anyone advise on what else I need to do please?

Thanks
Chris Chapman
chris.chapman@lexisnexis.co.uk

[Ivan Ferreira]

You can use ethtool to check the speed and duplex of the interface also:

ethtool eth0

If this is a Red Hat/Fedora or some clone, ro make the changes permament, edit:

/etc/sysconfig/network-scripts/ifcfg-eth0

and add:

ETHTOOL_OPTS="speed 100 duplex full autoneg off"

[Steven E. Protter]

Shalom Chris,

If these commands fail to help:
1) There could be a wiring problem that forces speed downb.
2) A switch port could be configured for 100 BaseT half duplex or the hub may not be capable of better speeds than this.
3) The LAN card itself could have a hardware problem.

Note that most of these problems are not with your system, but external. It may be time to talk to your networking group.

SEP

[V S Chakravarthi]

you can also try
mii-tool

http://linux.softpedia.com/get/System/Networking/mii-tool-2929.shtml

[Raimo Lesonen_1]

Put 100MB full fuplex for eth0:

mii-tool -F 100baseTx-FD eth0