Help setting NIC speed

Rustylinux · 07-08-2006, 06:38 PM

Hey,

I got a 1Gigabit nic card in the system and Ubuntu recgonises it just fine but it seems everytime the system gets reset it drops the nic back down to 10mb half duplex. So I have to consantly do a 'sudo ethtool -s eth0 speed 1000 full duplex autoneg off' command. Is there any way to permiently set it to 1gigabit?

DrOzz · 07-08-2006, 07:54 PM

You can add it to your NIC's configuration. Typically the file is :
/etc/sysconfig/network-script/ifcfg-eth0

You made no mention of what distro your using, so I'll assume this is where you'll set your settings. The below is an example of this file with the last line being what your interested in.

Code:

#
# File: /etc/sysconfig/network-script/ifcfg-eth0
#
DEVICE=eth0
IPADDR=192.168.1.3
NETMASK=255.255.255.0
BOOTPROTO=static
ONBOOT=yes
ETHTOOL_OPTS="speed 1000 duplex full autoneg off"

Rustylinux · 07-09-2006, 01:12 PM

Hey,

I have a 3com NIC that Ubuntu 5.10 dectecs just fine that is a 1gigabit NIC. When I do a sudo ethtool eth0 i get this information.

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: 10Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: g
Wake-on: d
Current message level: 0x00000037 (55)
Link detected: yes

I can set it to 100mb/s full duplex and its fine but when I set it to 1000mb/s it doesn't communicate with the network at alL???? any help would be greatly appricated as I would like to use the nic to its full potentinal.

DrOzz · 07-09-2006, 05:16 PM

d00d, your still going to be using your nic to its full potential with it set to 100, let alone a 1000.

I have no idea what your connected to, but I can guaruntee your not connected to an ISP provided you a gigabit internet connection.

Your not going to have any change by setting it to 1000

Rustylinux · 07-09-2006, 10:14 PM

I'm not concerned about the speed to the nic as my ISP is only 10megabit pipe. What i'm concerned about is my backups are not going the speed they should and its becuase that box is on a gigabit network and only running at 100mb/s. Where I want the nic to be utalized the most is during the backup process