WAN Speeds slower than windows

Support Network
1

I have recently managed to upgrade my home network to 400Mbps down (sweet) unfortunately my desktop does not seem to be achieving the full speeds (about only 150Mbps) the same desktop running Windows will achieve 400Mbps no problem on the same ethernet port

At first I believed this was a driver issue but I eventually set up an Iperf3 server internally and was able to achieve Gigabit speeds in both directions. This problem seems to be only affecting the WAN side not the LAN.

For refrence:
Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 26)

**~ >>> ethtool enp6s0**                                                           
netlink error: No such file or directory
Settings for enp6s0:
	Supported ports: [ TP MII ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Supported pause frame use: Symmetric Receive-only
	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 Receive-only
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Link partner advertised link modes:  10baseT/Half 10baseT/Full 
	                                     100baseT/Half 100baseT/Full 
	                                     1000baseT/Full 
	Link partner advertised pause frame use: Symmetric
	Link partner advertised auto-negotiation: Yes
	Link partner advertised FEC modes: Not reported
	Speed: 1000Mb/s
	Duplex: Full
	Port: MII
	PHYAD: 0
	Transceiver: external
	Auto-negotiation: on
Cannot get wake-on-lan settings: Operation not permitted
	Current message level: 0x00000033 (51)
			       drv probe ifdown ifup
	Link detected: yes
2

What do you mean by that?

And how did you measure speeds? Please run inxi --network -za and sudo mhwd -li.

3

Hi!
Check in your network config if is set to 1000 and full duplex

4

It seems so.

5

WAN as internet, LAN as in internal network.
ive used speedtest-cli, iperf3, wget and Steam to test download speeds.
~ >>> inxi --network [255]
Network: Device-1: Intel Wireless-AC 9260 driver: iwlwifi
Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169
Device-3: Intel Wireless-AC 9260 Bluetooth Adapter type: USB driver: btusb
~ >>> sudo mhwd -li
[sudo] password for taurion:

Installed PCI configs:

              NAME               VERSION          FREEDRIVER           TYPE

video-nvidia-450xx            2019.10.25               false            PCI
       video-linux            2018.05.04                true            PCI

Warning: No installed USB configs!

6

So what you mean is that you can communicate with other devices in the LAN at ~1Gb/s, but cannot achieve the expected ~400Mb/s when reaching the internet?

7

That is correct. and to clarify when using Windows on the same machine I can achieve the expected ~400Mb/s

8

also of note, Ive attempted to install the driver through manjaro-settings-manager with no change to performance

9