Throughput Issues RPi & Starlink

Installing and Using OpenWrt
1

Hello,

I'm hoping this is the right section of the forum for this question.

I'm moving from using a 4G dongle to Starlink for internet access. My current setup uses a Pi4 Connected over Ethernet to a TPLink TL-SG608E switch. With the 4G I was using a USB dongle connected to the Pi with the Interface for the dongle being in the WAN zone.

For Starlink I have set up a VLAN on the single ethernet port on the Pi (Eth0.20) and am using VLAN 1 for my LAN network. I've set up the VLANs on the switch and everything works fine connectivity wise. However I am only getting 30-50mbps speedtests over the network vs 150 - 250mbps direct on the Starlink WiFi/Ethernet.

Is this a hardware throughput issue with the Pi or Switch handling the VLANing? I've tested the ethernet cables I'm using with a direct connection from the starlink router to my laptop the both achieve full speeds. I've also tried putting the starlink router into bypass mode but it makes only 5-10mbps of difference.

Anyone have any thoughts where the issue might be and how to resolve it? Happy to post configs if needed, just let me know.

Cheers,
David

2

For anyone else hitting the same issue it was an ethernet cable issue. Replaced the last part of the trunk cable to the switch and all of a sudden I was getting equivalent speeds to direct connection to Starlink.

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