Hi, everyone,

i just host CHR on GCP, i don't know what the problem with my CHR, my home connection is dedicated 100M Down & 100M Up, i use wireguard for VPN to my CHR and the result is below my expectation, it really take long time to load any website (30-90 seconds to open website and picture sometimes won't load), when i open youtube, it take time to load the site, but when the video start playing the connection is normal (i test play some 4k videos and connection reach to 90mbps for stream the video), but when i try to speedtest result always show below 2M sometimes 0.3M, but no problem with upload speed.

i tried to reset factory / fresh install the CHR but the problem still there.

some said it's because missmatch MTU, that make sense because at the first time i can't connect to mikrotik server license (handshake error), and then mikrotik team tell me to change MSS after change mss to 1000 and it works,

does anyone here host CHR on GCP and facing the same problem like this? or i just got the bad luck?
should I move to AWS or another cloud services?

english is not my first language, but I hope you got my point
thank you

Right.

Interestingly, I was just tracking down the same issue.

I could track it to having packets reaching RouterOS that are bigger than the MTU. As far as I can see, this is probably caused by GSO. I think it is GSO because (1) this is a documented behavior of Linux with GSO and (2) it does *not* happen with UDP, which is why all my connections going in *and* out of the router via wireguard work nicely. Things start to fail if a part of the connection is not wireguard-based.

I don't have a fix apart from using wireguard for all connections (not nice). I did not find a way to disable GSO, neither on the Google Cloud side, nor on the Mikrotik side.

If you do not mind me asking, how did you contact the mikrotik team ? I'd very much like to talk to them about it ...

Regards,
Sylvain

I'm having the exact same issue, unfortunately I've already tried changing MTU, MSS, another VM Instance in Google Cloud, the CHR changed to P-Unlimited, site to site vpn, road warrior, and nothing help to fix the slow download speed.

check Your license status on:

System -> License

Hi,

I have the same problem, its not license or MTU or MSS issue

It's a mystery!

Hi

November 2023 - still have the same issue
My download speed at region Warsaw is 500 kbps max. (300 avg)

Upload is working fine.

GCP Issue stale from July.
https://issuetracker.google.com/issues/291524051?pli=1

Hi,

Same issue ....

Regards,

Same issue here. The default MTU 1500 would prevent me from downloading anything at all. Setting it to 1360 allows me to download.. albeit very slowly

The same issue persists. With the default MTU set to 1500, changing it to 1460 results in the following: UDP performance is normal, TCP outbound (sending) is normal, but TCP inbound (receiving) is very slow, only a few Mbps. chr 7.14.3

Hi,

Many people have already reported this issue, and as we can see, the thread keeps growing.

The slow download speed on CHR hosted on GCP is a serious problem affecting a core function of the device - stable network traffic.

Can MikroTik finally comment on the cause?
This is very important for many of us, especially since the problem seems to have been identified for quite some time now.
We are hoping for an official response or some guidance towards a solution.