1Gbps test issues

RouterOS General
1

My ISP provides a symmetrical 1Gbps line and I am unable to utilize the full speed. I know there can be a number of causes for such an issue, but I feel like I should be seeing different results based on the tests I’ve done.

All of tests below have been tested individually on MikroTik gear, the ISP provided modem and a media converter (ISP uses SFP cable, which can be plugged into a media converter for a direct RJ-45 connection with no internal routing) and all results are nearly identical.

List of tests:

1.) iPerf3 tests (run on several different systems using wired connections) to several of my own external web servers with known 1Gbps lines burt at ~300Mbps and within seconds drops to ~100Mbps and stays there. I did test this web server from several other locations and do see approximate 1Gbps speeds. All servers are on different hosting providers.
2.) iPerf3 to AWS instance with 10Gbps network, setup specifically for debuging this issue, shows exact same results as above (burst to 300, drop to 100)
3.) Downloading a single ISO file from a debian mirror shows between ~100Mbps. If I download the same ISO from several different hosts at the same time I can achieve the full 1Gbps speed.
4.) Speed tests at fast.com and speedtest.net (using the ISPs own test server) show 1Gbps.

It seems that no matter the speed of the host I connect to, the maximum speed will be ~100mbps.

I realize this is not specifically a MikroTik issue, as I’ve removed it and still see the same results, but I am really hoping that someone may have some input here. I’ve contacted the ISP and their technitions point to the speedtest results being fine.

2

Reading this I think the ISP is throtteling except for the sites where you can test speeds.

Check if fasttrack is enabled for UDP and TCP and used ports.

3

Modern speedtest runs multiple streams in parallel … which helps in quite many cases to achieve higger/maximum speed (and not only when there’s a MT router on the way). So you might want to switch speedtest into single-stream mode to verify if this is your problem.

4

Thanks for all the replies!

Tested with single stream on a few speed tests, in all cases is was above ~500mbps and in one it was full speed at 920mbps

I will continue doing some tests but I suspect my ISP is throttling, but getting anywhere with this is difficult. I understand an ISP not wanting to admit to throttling, but this one in particular goes out of its way to say they do not (Bell Canada).