Hi All,

I have an ASUS P5QL-EM with Q9550, 4GB OCZ Ram.
CentOS 5.2 x86_64
All is working great.

The network card is the onboard card and when I run: ethtool eth0 I get the following:

Settings for eth0:
Supported ports: [ FIBRE ]
Supported link modes: 1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: Not reported
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: FIBRE
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
Link detected: yes


I need to downgrade the speed to hard setup of 10Mb/s or 100Mb/s
Also, I want to disable auto-negotiation and set duplex to Full.

I type:

ethtool -s eth0 speed 100 duplex full autoneg off

And nothing happens.
This command is disregarded / ignored entirely.

How do I force the downgrade or specifics on this card?

lspci shows:
...
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)

If I add another card, an old 8139C 10/100 and apply the command above, it obeys it immediatly.

lspci shows:

...
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
02:00.0 IDE interface: Marvell Technology Group Ltd. 88SE6121 SATA II Controller (rev b2)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)


[root@localhost ~]# ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes
[root@localhost ~]# ethtool -s eth1 speed 100 duplex full autoneg off
[root@localhost ~]# ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: No
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes
[root@localhost ~]#

[root@localhost ~]# mii-tool

eth1: 100 Mbit, full duplex, link ok
[root@localhost ~]# ethtool -s eth1 speed 10 duplex full autoneg off
[root@localhost ~]# mii-tool
eth1: 10 Mbit, full duplex, link ok
[root@localhost ~]# ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: No
Speed: 10Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes



Is it hopeless? can I not have

Any pointers on how to set the Gigbit card to lower speed?

EDIT:
====


When the link is down (cable disconnected) the values that I see are:

[root@localhost ~]# ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: Unknown! (0)
Duplex: Half
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
Link detected: no

So,. now I see the supported link modes,. and they clearly show the 100BaseT/Full option.
But how do I force it to be working when I connect the network cable?
Notice the Supported ports [ TP ], it changes to [ FIBRE ] instead of [ TP MII ]

Also, I can't run mii-tool for the Giganet Card, only ethtool, whereas with the 8139C card the utility works well.

thanks for any input.




=================================================================

In CentOS Support forums I recieved information that helped me resolve this issue:



1. as I'm using CentOS 5.2 x86_64 I downloaded the following file from the link you provided.

wget http://www.pperry.f2s.com/linux/ajb/r8168/kmod-r8168-8.008.00-2.x86_64.rpm [^]

2. I used an editor (my favorite is vi):

vi /etc/sysconfig/modules/local.modules (this file did not exists before)

3. Pasted the following into the file:

#!/bin/sh

#
# Load the r8168 module (after the r8169 is unloaded).
#
/sbin/modinfo -F filename r8168 >/dev/null 2>&1
if [ $? -eq 0 ]
then
        modprobe -r r8169 >/dev/null 2>&1
        modprobe r8168 >/dev/null 2>&1
fi




4. chmod 755 /etc/sysconfig/modules/local.modules

5. rpm -i kmod-r8168-8.008.00-2.x86_64.rpm

6. reboot the server.

Done!

Now,. I can manage:

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

and Append at the end of the file:

ETHTOOL_OPTS="speed 10 duplex full autoneg off"

and it works fine.