LTE connection - high packet loss

#1

Hi,

I’ve got LTE modem here (Huawei B310) and I’m experiencing lot of packet losses when I’m trying to pull images from production.cloudflare.docker.com hosts. Loss rate fluctuates between 10 - 50%.

I’ve got 0% packet loss with other services like Google, AWS, … The only problem is CloudFlare. I’m located in the Czech Republic and I’m routed to Poland …

raceroute 104.18.125.25
traceroute to 104.18.125.25 (104.18.125.25), 64 hops max, 52 byte packets
 1  192.168.1.1 (192.168.1.1)  0.727 ms  0.576 ms  0.537 ms
 2  194.212.194.26 (194.212.194.26)  18.601 ms  19.749 ms  20.010 ms
 3  * * *
 4  * * *
 5  cloudflare.thinx.pl (212.91.0.28)  83.037 ms  82.832 ms  74.784 ms
 6  104.18.125.25 (104.18.125.25)  79.188 ms  94.792 ms  72.336 ms

Last tests …

 2  194.212.194.26 (194.212.194.26)  18.601 ms  19.749 ms  20.010 ms

--- 194.212.194.26 ping statistics ---
10 packets transmitted, 10 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 36.518/44.311/57.542/6.578 ms
 5  cloudflare.thinx.pl (212.91.0.28)  83.037 ms  82.832 ms  74.784 ms

--- 212.91.0.28 ping statistics ---
10 packets transmitted, 8 packets received, 20.0% packet loss
round-trip min/avg/max/stddev = 88.748/103.502/128.890/11.494 ms
 6  104.18.125.25 (104.18.125.25)  79.188 ms  94.792 ms  72.336 ms

--- 104.18.125.25 ping statistics ---
21 packets transmitted, 12 packets received, 42.9% packet loss
round-trip min/avg/max/stddev = 87.279/95.447/108.486/5.733 ms

There’s something bad going on between 194.212.194.26 (T-Mobile) & 212.91.0.28 (cloudflare.thinx.pl).

When I test other Poland servers, they do work.

--- pl61.nordvpn.com ping statistics ---
14 packets transmitted, 14 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 77.299/81.647/87.665/3.599 ms

--- www.wroclaw.pl ping statistics ---
12 packets transmitted, 12 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 61.088/71.812/102.901/11.385 ms

Any idea what I can try or how to precisely analyse where the problem is? I’m not a networking guy, but have some knowledge. Clearly this problem is out of my expertise.

Thanks!

#2

Probably congestion but we cannot do more than guess.

#3

Seems, still not sure, it’s a T-Mobile issue. Got a response from atman.pl (CloudFlare data centrum in Poland) that they don’t have any networking issues. They tried ping/traceroute other way around and there’s no packet data loss in this direction. Weird.