NSA320 - fast LAN, slow WAN - download speed problem

Hello,

I pulled my Zyxel NSA320 out of the closet, updated the soft to the newest possible one, which was old anyway, and started doing download speed tests. Unfortunately, while samba can reach 50 MB / s, download speeds from the net reached max 12 MB / s - definitely not enough. Of course connected to a gigabit router (asus ac58u), NIC 1000 / full duplex - no changes.

I have a 300 mbit connection and I can easily reach such speeds on laptop.

I thought maybe the error is in the original software. I install Debian, but the situation has not improved much, now the speed reaches 16 MB / s download from the internet.

CPU load when downloading max 30%.

Where to look for a solution?

I tested the speed through both

wget -O / dev / null http://speedtest.wdc01.softlayer.com/downloads/test1000.zip

as well as downloading ubuntu via transmission



Edited 1 time(s). Last edit at 12/03/2019 05:09AM by rookpl.

Theres a lot to look at here.

first being what is the connected speed of your internet facing router - does it utilise a proper switch in its make up or is it a hub - yes some devices still operate with hubs!

https://www.gbmb.org/mbit-to-mb

i know the difference between MB and Mb ;) and all values in my previous post are correct.

router is asus ac68u, and speed are good from it.

NSA320 - router - PC - speeds are 40-50 MB/s write to NSA

.......................... ............../ PC - full speed 35 MB/s
Internet 300 Mb/s- router/ -- WIFI - full speed 35 MB/s
........................................\
...................................... \NSA320 - speed are 12 MB/s on stock firmware, 16 MB/s on Debian



Edited 4 time(s). Last edit at 12/04/2019 03:17AM by rookpl.

in that case, I would be looking to tune the TCP/IP stack

http://www.linux-admins.net/2010/09/linux-tcp-tuning.html

https://linux2me.wordpress.com/2018/06/03/tuning-the-tcp-stack-system-administrator

Thank you for reply. i'll check that links and try. I also borrow ethernet-usb adapter, but i need compile drivers first