Packet Loss on all central european servers

[dornhoeschen 0]

Since a while I experience Packet Loss on the AirVPN Network. Lately it has gotten worse.

What happens?
I have approximately 5-20% packet loss on all
- Frankfurt
- Berlin
- Swiss
and partially also on Netherlands servers.

This packet loss is constant and reproduceable from my end.

When I connect to Norway packet loss is gone and I have a stable connection with an very acceptable packet loss of 0.00-0.02% - which I deem normal.

Logs
Connected to Camelopardalis Norway (all good)





Connected to Ogma Germany





Conclusio
I write you here, because from my end it looks like AirVPN is the problem. If I choose a different exit node the packet loss is completely gone. Those servers close to my location all have this problem.

Do I have outdated configs?
Do some settings missmatch?
How do i check this?

Is there a way to narrow down the problem?
When does the Packet loss occur - on the way to the exit node or behind the exit node?

Edited ... by dornhoeschen

[dornhoeschen 0]

I did some more advanced tests:

I used Frankfurt Adhara for this.

The problem persists on:
- Wireguard and OpenVPN
- On all Ports 3 with Wireguard
- Without MTU (=0) and with lowerd MTU (=1000) (=1320 is the default) 

I could "eliminate" the problem when i use OpenVPN TCP instead of UDP. BUT... I do not see any more lost packages in the ping, but every 5. packet requires the double amount of time. So the TCP just masks the problem and there is another round-trip for every 10th to 5th packet.

Here the screenshot of OpenVPN with TCP - 2 packets (10%) have been lost (actually shown on the tool)


Any advice?

Edited ... by dornhoeschen

[dornhoeschen 0]

I figured it out. It is the AirVPN Server being over bandwidth limit.

After choosing Fuyue Germany the packet loss is normal.
This server has higher bandwidth capacity.

My guess what happens:
The server reaches its bandwidth limit on traffic peaks, which causes the excess bandwidth to be dropped. Since some servers are quite full this happens with a predictable chance. Lost packets are every 20th to every 5th.

While fixable by the user with some knowledge, I think AirVPN should investigate this because its a very arbitrary phenomenon and hard to understand. Maybe some reserved bandwidth not able to be assigned could help?

[Fenix_Inc 1]

I got the same issues with packet loss of 5-20% last couple of weeks on Dalim and Menket servers.
Generally, I don't have any packet loss on my WAN.
According to AirVPN statistics, these servers are relatively underutilized.  
Is it the AirVPN problem itself? Or servers?