Slow ethernet bandwith Centos 7

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amartina
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Joined: 2018/07/12 21:57:18

Slow ethernet bandwith Centos 7

Post by amartina » 2018/07/12 22:03:06

Hi everyone, we have a Supmermicro X10SRA-F, with a Intel I210 Ethernet controller, gigabit interface, switch and router.
We are using kernel 3.10.0-862.6.3.el7.x86_64, and detected really slow bandwidth (25~12 Mbit/s), but with a debian live usb in the same server we have 610 Mbit/s.
We manually updated to latest Intel driver (igb-5.3.5.18), and nothing changed.
Any thoughts? we are lost.

Thank you

Agu

hunter86_bg
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Re: Slow ethernet bandwith Centos 7

Post by hunter86_bg » 2018/07/13 04:46:57

Paste ethtool's output. Maybe, there is a problem with the negotiation between NIC and the other side.

amartina
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Re: Slow ethernet bandwith Centos 7

Post by amartina » 2018/07/13 16:55:09

Hi @hunter86_bg my ethtool output is:
Settings for eno1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: off (auto)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes

As far as I can see, everything looks ok.

hunter86_bg
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Re: Slow ethernet bandwith Centos 7

Post by hunter86_bg » 2018/07/13 17:38:52

Seems ok. Is there anything in the statistics (-S)?
Also run 'ethtool -i'.
Also run 'ethtool -i' under the debian live media to crosscheck which module is used.

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TrevorH
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Re: Slow ethernet bandwith Centos 7

Post by TrevorH » 2018/07/13 17:56:47

What are you using to measure the bandwidth?
CentOS 5 died in March 2017 - migrate NOW!
Full time Geek, part time moderator. Use the FAQ Luke

amartina
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Re: Slow ethernet bandwith Centos 7

Post by amartina » 2018/07/16 13:34:30

Hi everyone, thank you for your responses.
I installed CentOS 7.4, CentOS 6.5, Fedora Server 28, Ubuntu 18.04 and Debian 9.4, and checked that I had slow bandwidth in CentOS's and fedora, but good bandwidth in Debian and Ubuntu.
Ethtoot statistics looks fine in every installation, drivers were the same... so I decided to chance the method to measure bandwidth.
For some strange reason sppedtest-cli [1] shows slow bandwidth in CentOS and Fedora (RH family?) but works fine on Debian's family, using scp from other computer in the network I had 1 gbps with all systems.

Sorry for the inconvenience.
Thank you all for your time

[1] https://pypi.org/project/speedtest-cli/

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