Slow gigabit ethernet

Renecek

macrumors regular
Original poster
Jun 1, 2011
105
4
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:


Lenovo test with the same cable, same port in switch
 

Dominat0r

macrumors 6502a
Jul 25, 2009
710
3
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.
 

Renecek

macrumors regular
Original poster
Jun 1, 2011
105
4
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?
 

Dominat0r

macrumors 6502a
Jul 25, 2009
710
3
Firewall set? I will test it on my end.
[doublepost=1526920218][/doublepost]Firewall enable or disabled, gave me the same results.
 

Weaselboy

Moderator
Staff member
Jan 23, 2005
30,610
10,401
California
I put macbook into safe mode and tried to run speedtest. It shows me about 700mbps
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.
 
  • Like
Reactions: kohlson

Renecek

macrumors regular
Original poster
Jun 1, 2011
105
4
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.
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.
 

Weaselboy

Moderator
Staff member
Jan 23, 2005
30,610
10,401
California
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.
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/
 

Renecek

macrumors regular
Original poster
Jun 1, 2011
105
4
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
 
  • Like
Reactions: Weaselboy

duervo

macrumors 68020
Feb 5, 2011
2,330
1,095
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:


Lenovo test with the same cable, same port in switch
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.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.