Playback issues over internet

Hi all,

I hope that you can help me troubleshoot this issue:

Using Infuse together with Plex. On my local network everything works without issues. When I try to stream movies from my home to my mother’s house I have playback issues (buffering / stutter).
Plex server is running on a Synology DS 920+. I don’t see any resource issues
Movies direct play so transcoding should not be a factor
The router at my house is Ubiquiti UXG Pro. I can’t see that I’m throttling traffic
The router at my mother’s house is a Google one that has very few settings that I can change. Seems fast enough though

The internet connection at my house is 1000 / 500 Mb/s. The connection at my mother’s is 600 / 60 Mb/s

Server and clients are hardwired

I have tested with speedtest.net and I get the expected download and upload speeds

When I test the connection with Infuse I get around 40 Mbps average

I have also tested with iperf3 between a PC at my mother’s house and my NAS. I get:

[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 9.00 MBytes 75.4 Mbits/sec 488 540 KBytes
[ 5] 1.00-2.00 sec 7.38 MBytes 61.9 Mbits/sec 10 413 KBytes
[ 5] 2.00-3.00 sec 6.75 MBytes 56.6 Mbits/sec 0 441 KBytes
[ 5] 3.00-4.00 sec 8.38 MBytes 70.2 Mbits/sec 0 455 KBytes
[ 5] 4.00-5.00 sec 6.88 MBytes 57.7 Mbits/sec 0 461 KBytes
[ 5] 5.00-6.00 sec 4.12 MBytes 34.6 Mbits/sec 0 462 KBytes
[ 5] 6.00-7.00 sec 6.88 MBytes 57.7 Mbits/sec 0 462 KBytes
[ 5] 7.00-8.00 sec 8.25 MBytes 69.2 Mbits/sec 0 464 KBytes
[ 5] 8.00-9.00 sec 7.00 MBytes 58.7 Mbits/sec 0 471 KBytes
[ 5] 9.00-10.00 sec 7.00 MBytes 58.7 Mbits/sec 0 488 KBytes


[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 71.6 MBytes 60.1 Mbits/sec 498 sender
[ 5] 0.00-10.06 sec 69.1 MBytes 57.6 Mbits/sec receiver

The PC I test with is on Wifi. I forgot my USB-C to Ethernet adapter so can’t test it with a cabled connection. I’m wondering why there are so many retries…?

I have also tested with a direct SMB connection using Tailscale as VPN to access my network at home (Tailscale running on my NAS). Same issue

I am at a loss at this point so any ideas are more than welcome!

I rebooted my mother’s router (Google) and now I get 400 Mbps. So problem solved. Very strange!

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