Slow gigabit ethernet

Discussion in 'MacBook Pro' started by Renecek, May 21, 2018.

  1. Renecek macrumors regular

    Joined:
    Jun 1, 2011
    #1
    Hello,
    MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports) without TB
    2 GHz Intel Core i5
    8 GB 1867 MHz LPDDR3

    and my problem is slow ethernet. Have gigabit connection at home and at work. Using USB-C Dock LMP (https://www.amazon.co.uk/LMP-USB-C-mini-Dock-Ethernet-grey/dp/B01MZFK9S1) but speedtest still shows me max 300mbps. Used the same FTP cat5e cable with another laptop (lenovo with Windows 10) and there is 650 - 900mbps.

    Any idea what is bad? I think it's because of USB-C dock?

    Thank you

    Macbook test:
    [​IMG]

    Lenovo test with the same cable, same port in switch
    [​IMG]
     
  2. Dominat0r macrumors 6502a

    Dominat0r

    Joined:
    Jul 25, 2009
    #2
    I noticed something similar with my 2013 and TB to NIC dongle. If I am on my Mac mini, I get about 2x the speed as I do with the same line and my TB->NIC dongle in my MBP.

    I have not been able to figure this one out.
     
  3. Renecek thread starter macrumors regular

    Joined:
    Jun 1, 2011
    #3
    just tried another test. I put macbook into safe mode and tried to run speedtest. It shows me about 700mbps so I think MacOS has some limitations in ethernet? Any way to fix that?
     
  4. Dominat0r macrumors 6502a

    Dominat0r

    Joined:
    Jul 25, 2009
    #4
    Firewall set? I will test it on my end.
    --- Post Merged, May 21, 2018 ---
    Firewall enable or disabled, gave me the same results.
     
  5. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #5
    Safe mode stops all launch and startup items from running, so it may be that you have some utility of some sort launching during a normal boot that is slowing you down.
     
  6. Renecek thread starter macrumors regular

    Joined:
    Jun 1, 2011
    #6
    Yes I know about that but I want to find what slow down my ethernet speed. Tried to turn off ESET Cyber Security and Adguard, didn't help it.
     
  7. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #7
    You might try looking in these folders for launch items also. It may be something lingering in there you forgot you even installed. That really is a big clue to the issue that it is much better in safe mode.

    ~/Library/LaunchAgents (~ is your users folder)
    /Library/LaunchAgents
    /Library/LaunchDaemons
    /Library/StartupItems
    /System/Library/Extensions/
     
  8. Renecek thread starter macrumors regular

    Joined:
    Jun 1, 2011
    #8
    Thank you. Can you try to check this?

    ~/Library/LaunchAgents
    Snímka obrazovky 2018-05-21 o 21.39.56.png

    /Library/LaunchAgents
    Snímka obrazovky 2018-05-21 o 21.40.06.png

    /Library/LaunchDaemons
    Snímka obrazovky 2018-05-21 o 21.40.18.png

    /Library/StartupItems - no files there
    /System/Library/Extensions/ - no files there
     
  9. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #9
    I would ditch the Eset and Teamviewer stuff to start then test. Unfortunately, there is no easy way to troubleshoot this other than trial and error.
     
  10. Dominat0r macrumors 6502a

    Dominat0r

    Joined:
    Jul 25, 2009
    #10
    I use TeamViewer as well for work, hmmm, Ill try without it.
     
  11. duervo macrumors 68020

    duervo

    Joined:
    Feb 5, 2011
    #11
    If you can try that LMP device in the Lenovo system, that would be a better test of that adapter. It’s possible that LMP might be limiting the bandwidth of the RJ45 port, either on purpose, or it’s shared with the remaining 7 ports. ie: The HDMI 1.4 port has a max bandwidth that’s close to that of the single USB-C 3.1 port that provides bandwidth for the entire 8 ports. So, LMP may be setting a lower limit for some of the other ports in order to maintain quality of the HDMI port.

    I doubt it though. I think it’s probably either just a limitation of the chipset they used in that 8-port adapter, or it (chipset) is getting too hot and throttling to a degree. You’re not the first to have performance issues with the RJ45 ports on these multi-port USB-C “docks”. It’s rather common. In fact, I’d probably suspect that all the adapters that have this issue probably use the same chipset.
     

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