100mbps rather than gigabit LAN (problem with e1000e)

[julien-dal-col]

Hi,

I have a Dell optiplex 755 running Ubuntu 13.04.

The integrated NIC is "Intel 82566DM Gigabit LAN"

"Connection Informations" gives me:
- "Driver: e1000e"
- "Speed: 100 Mb/s"

I guess there is a problem, It should say "1000Mb/s"... There is no 10/100 port in my whole LAN, only gigabit ones.

I don't know how to test wether my connection is actually limited to 100mbps or not...
I don't know how to fix this if the connection is endeed limited to 100mbps.

Any advice anyone?
Thank you very much in advance for your help.
Best,
-J-

[praseodym]

Also the switches (if any) and all cables support gigabit? Please show

sudo apt-get install ethtool
sudo ethtool eth0

[The Cog]

lshw -C network

should give useful information too.

[julien-dal-col]

Everything 100% gigabit...

user@ubuntu:~$ sudo ethtool eth0
[sudo] password for user:
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes

_____________________________________

user@ubuntu:~$ sudo lshw -C network
*-network
description: Ethernet interface
product: 82566DM-2 Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eth0
version: 02
serial: xxxxxxx
size: 100Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=2.1.4-k duplex=full firmware=1.4-0 ip=192.168.xxx.xxx latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:43 memory:febe0000-febfffff memory:febdb000-febdbfff ioport:ecc0(size=32)


Useful?

[sanderj]

The lshw output in line "configuration" says "speed=100Mbit/s". So there you have it.

My own output says: "speed=1Gbit/s"

So: check your cables and switch. Bad cables/connectors are a cause of throttling down to 100 or even 10 Mbps.

[julien-dal-col]

I did... :S
The NIC is connected to a brand new Linksys WUMC710 and the Ethernet cable was bundled with it (it's written "Cat5E patch cable" on the cable)...

I get a gigabit connection with the same device (linksys) and the same cable plugged into a different machine (running Win7 pro x64)...

[sanderj]

Is there Windows on you Dell optiplex 755? If so: is gigabit working under Windows?

Furthermore, you could do this:

# List current settings
sudo ethtool eth0
# are 1000baseT link modes listed?

# at your own risk (if 1000baseT is listed !):
# Re-negotiate speed
sudo ethtool -r eth0
# Force speed manually to gigabit
sudo ethtool -s eth0 speed 1000

HTH

[julien-dal-col]

no windows on the optiplex

user@ubuntu:~$ sudo ethtool eth0
[sudo] password for user:
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes



What is the risk of forcing gigabit transfer rate?

Tx
-J-

[julien-dal-col]

One more info:

When I installed 13.04 the network card would not work ("device not managed"). I solved this following this tread:
http://www.techishare.com/linux/ubun...problemsolved/

Could it be linked to my current problem?
Best,
-J-

[praseodym]

Check:

sudo ethtool -s eth0 speed 1000 duplex full
sudo ethtool eth0