topic Re: LINUX AS 3 R4 DUPLEX SETTING in Operating System - Linux

LINUX AS 3 R4 DUPLEX SETTING

John Ketron — Tue, 17 May 2005 14:13:21 GMT

how can I force the duplex setting to 100 full or even see what it is at right now. I cannot use mii-tool or ethtool, both do not work

Re: LINUX AS 3 R4 DUPLEX SETTING

Stuart Browne — Tue, 17 May 2005 17:50:48 GMT

What network card is in the server?

Those two tools work on 90% of the drivers Linux provides.

The output of 'lsmod' and 'lspci' will probably be of help there.

In any case, your info will hopefully be in the 'dmesg' buffer, or in '/var/log/dmesg'.

Re: LINUX AS 3 R4 DUPLEX SETTING

Gopi Sekar — Wed, 18 May 2005 01:16:14 GMT

when the driver is loaded and ip address configured most of the drivers will give what is the speed at which they are working. these messages are generally sent to kernel messages (dmesg) and /var/log/messages.

Gopi

Re: LINUX AS 3 R4 DUPLEX SETTING

Ross Minkov — Wed, 18 May 2005 09:26:13 GMT

Add options directive in /etc/modules.conf to set the speed and the duplex. For example here is /etc/modules.conf from one of my servers:

# cat /etc/modules.conf
alias eth0 e1000
alias eth1 e1000
alias eth2 e1000
alias eth3 e1000
options e1000 Speed=100,100,100,100 Duplex=2,2,2,2
alias eth4 tg3
alias scsi_hostadapter cciss
alias usb-controller usb-ohci

HTH,
Ross

Re: LINUX AS 3 R4 DUPLEX SETTING

Steven E. Protter — Wed, 18 May 2005 09:42:44 GMT

If the switch is programmed for autonegotiate and is a full duplex switch/hub.

And the card is modern, you should not have to do anything to go full duplex.

The preferred methodology is autonegotiate.

I would stop trying to force full duplex and investigate the wiring,switch and other infrastructure to figure out why you are not getting full duplex with auto negotiate.

SEP