Hi Paul,

As a main router I am using Mikrotik CCR1036-12G-4S, BGP with full tables, two esxi servers connected to it directly and few other servers, also company network and few gigabit microwave links, one to my home so I can work remotely .  Over the microwave links I can achieve full speed for both upload and download (inside my network) using iperf3. I can also utilize full upload. But same with download. To be honest I have 1Gb leased line in different location from different carrier and I do not have such problem with bandwidth speed. I am really surprised as I just did an upgrade from 500Mbit to 1Gb.

Regards,

Wojciech



Paul Bone wrote on 28/05/2020 15:54:
Hi,

Have you tried using UDP over TCP on iperf?

This could also be caused by the device you are using unable to process the speeds - have you tried a back to back iperf test directly between two devices before putting them over the leased line?

Paul

On Thu, 28 May 2020 at 15:46, Wojciech Lesiak <[email protected] <mailto:[email protected]>> wrote:

    Hi all,

    I have 1Gb lease line from BT Net and I have an issue with
    download speed for one thread download, I can't achieve more than
    500Mbit over it, but upload with one thread is going full speed.
    To do my test I am using iperf3 also perfsonar with same results.
    I have reported it as a fault but they said if I want to utilize
    full speed I have to use multi thread download. I do not believe
    that is right. What can I do about it?

    Regards,

    Wojciech Lesiak

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Paul Bone
Network Consultant

PMB Technology

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