Is it 100 Mbps or 1000 Mbps?

webking · 02-01-2014, 01:08 AM

Hi. I have a dedicated server with 1000 Mbp link. I am not 100% sure why it's only downloading at only 11Mb/s. It looks like it's only using 100Mbp link and not 1000Mbp according to dmesg below. Can someone help to explain this part here. TIA.

Quote:

[29906.085497] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[29906.085502] e1000e 0000:00:19.0: eth0: 10/100 speed: disabling TSO

Quote:

dmesg | grep eth0
[ 4.749457] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:25:90:55:38:f1
[ 4.749462] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
[ 4.749515] e1000e 0000:00:19.0: eth0: MAC: 10, PHY: 11, PBA No: FFFFFF-0FF
[ 10.531074] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[29868.098709] e1000e: eth0 NIC Link is Down
[29871.021365] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[29884.974470] e1000e: eth0 NIC Link is Down
[29906.085497] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[29906.085502] e1000e 0000:00:19.0: eth0: 10/100 speed: disabling TSO

myatthu · 02-01-2014, 02:15 AM

Can you check your interface output as below?

Code:

ethtool ethX

webking · 02-01-2014, 02:36 AM

Is this it?

Quote:

Speed: 100Mb/s

$ ethtool eth0
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: 2
Transceiver: internal
Auto-negotiation: on
MDI-X: off
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes

myatthu · 02-01-2014, 02:40 AM

Yes. It is only 100Mb based on the output. You may want to take a look physical cable or switch port config. You can also directly connect to any gigabit port.
For example, your laptop. Now most of notebook come with gigabit port.

webking · 02-01-2014, 02:48 AM

Well, I didn't configure this box. It's one of my dedicated servers setup by a hosting company. May be they neglected to put it on a high speed switch. Thanks for your help. It helps alot.

myatthu · 02-01-2014, 03:49 AM

That is my favourite link state utils.

andy78 · 02-01-2014, 12:41 PM

According to you logs it was up on 1000 and then went down and up again on 100 most likely this is negotiated from the switch at your hosting service.