Gigabit lan problem??

**lawi** · June 6th, 2008

Hi everybody, I have a ASUS M2N-MX K8M890 SOCKET AM2 MICRO-ATX mother board which is stated to have gigabit lan.

I don't feel I get that speed on my gigabit lan at home and need help to verify which driver is used.

lspci gives me 00:07.0 Bridge: nVidia Corporation MCP61 Ethernet (rev a2) but I don't know what to do with this info.

What I was thinking is that maybe it has loaded a 100Mb driver instead of a 1000Mb??

/lawi

**chili555** · June 7th, 2008

Is every part of your network gigabit capable? The machine to or from which you are transferring data? The router or switch? If not, then you will get the speed of the weakest link. May we please see which driver is loaded in:

Code:

sudo lshw -C network

Also, we can gain some clues in:

Code:

sudo ethtool eth0

Finally, as far as I know, there is no 100Mb/s driver separate from a 1000Mb/s driver; there is simply a driver. The driver is supposed to, but doesn't always, support whatever capabilities the device is capable of.

**lawi** · June 7th, 2008

lshw -C didn't say anything, even tried with output as HTML

ethtool ->

Settings for eth0:
Supported ports: [ MII ]
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
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: external
Auto-negotiation: on
Supports Wake-on: g
Wake-on: d
Link detected: yes

Any ideas?

/lawi

**chili555** · June 7th, 2008

Code:

sudo lshw -C network

lshw -C didn't say anything

It takes a few moments to collect all that information; did you give it a few moments? Also, the first letter is lower case L. Is that what you typed?

---snip---
Speed: 100Mb/s
---snip---
Auto-negotiation: on
---snip---

It is running at 100Mb/s, not 1000Mb/s, either in error, or because it has negotiated the rate as the maximum rate at which it can reliably transfer data with another device on the network. You can try:

Code:

sudo ethtool eth0 speed 1000

However, if another device on the network has reported it's only able to do 100Mb/s, then you may get errors or other issues. I'd think it's better to troubleshoot the other devices on the network to see why a gigabit device is not operating correctly.

**lawi** · June 13th, 2008

Ok, thanx I try that

**ModelM** · June 13th, 2008

If you look at your output from ethtool you'll see that the adapter is indeed capable of gigabit, but it's not advertising that capability...

Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full

So, other devices are connecting at 100, the fastest speed it advertises. I don't know how to fix this, but it might be a place to begin...