How to set AUTONEG OFF on RedHat WS 4 update 5
 

We run Redhat Workstation 4 update 5 (64-bit) and tried to set the autoneg off using the following command and received errors:

#ethtool -s ethx autoneg off speed 1000 duplex full

Cannot set new settings: Invalid argument
not setting speed
not setting duplex
not setting autoneg

Secondly,

editted the file /etc/sysconfig/network-scripts/ifcfg-ethx to include the following line:

ETHTOOL_OPTS="autoneg off speed 1000 duplex full"

and run the command: #service network restart

This action disabled the interface. We have rebooted and the interface is still disabled. We have chenged the ifcfg-ethx file back to the original form and rebooted, still the same problem.

Please help out with some advise.

Can you bring it up with ifconfig?

If you are forcing the speed and duplex settings of the interface, I don't think you need to specify Autoneg off.. That's sorta redundant.
ethtool -s eth0 speed 1000 duplex full

and remember if you are forcing speed and duplex on a NIC you MUST do the same to the switchport the device is connected to, or you will cause a duplex mismatch.


not sure why your nic didn't come back up.. is there anything in your logs ?
cat /var/log/dmesg | grep -i eth

I don't think that will work.

OP,do you have Realtek PCI/PCcard/s and what driver do you use for it,if so?

Entries in /var/log/dmesg
divert: not allocating divert_blk for non-ethernet device lo
forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.42-rh.
divert: allocating divert_blk for eth0
eth0: forcedeth.c: subsystem: 0103c:12fe bound to 0000:00:08.0
divert: allocating divert_blk for eth1
eth1: forcedeth.c: subsystem: 0103c:12fe bound to 0000:00:09.0


# lspci |grep -ethernet
00:08.0 Ethernet controller: nVidia Corporation MCP55 Ethernet (rev a3)
00:09.0 Ethernet controller: nVidia Corporation MCP55 Ethernet (rev a3)

System is HPxw 9400.


Entries in /var/log/dmesg relating to ethernet: