Packet loss starting at ~8 Mbps upload via Starlink + Peplink / SpeedFusion — has anyone seen this?

Specialized Market Starlink
1

Hello community,

I’m facing an issue that I haven’t been able to solve despite several tests, and I’d like to know if anyone has experienced the same thing with Starlink + Peplink.

:mag: Context

  • I have a Starlink connection (direct upload on PC ~ 40 Mbps).
  • I connect Starlink on Peplink WAN 1.
  • When I stream with OBS at ~ 8 Mbps upload via the Peplink LAN, I notice significant packet loss…

:question: What I’m trying to understand / feedback I’m looking for

  • Have other Starlink + Peplink users noticed the same issue when streaming via Starlink — unstable connection (packet loss / jitter)?
  • Could this be related to Starlink not providing stable reserved upload bandwidth, or due to latency spikes / packet loss during satellite handover / constellation changes?
  • What SpeedFusion, WAN Smoothing, FEC, WAN priority, etc., configurations have you used to get a stable stream at this bitrate?
  • For now, streaming at 8 Mbps is only stable when using 2× Starlink in Bonding + WAN Smoothing.
  • If anyone here has managed to achieve a stable stream (OBS or similar) with ~ 8–10 Mbps upload via Starlink + Peplink, it would be great if you could share your exact settings: Peplink model, firmware, SpeedFusion / WAN Smoothing / tunnel configuration, MTU/MSS, etc.

Stats
Stats1378×877 76.6 KB

Config
Config624×958 52.4 KB

*Peplink Balance 310X
*8.5.3

Thanks in advance for your feedback!

2

Hi…
Looking old messages…
Have you try to install a dumb switch between the Peplink and the Starlink? (just try it)

1 Like
3

Hello,

I’m running on 230V with Starlink and Peplink. I also tried connecting a switch and a router behind the Starlink router, same result.

Thanks

4

Blockquote
Have you try to install a dumb switch between the Peplink and the Starlink? (just try it)

This only applied to the old Starlink V2 dishes that required the Starlink Ethernet adapter. There was something with the Starlink Ethernet Adapter that would drop every 4th Ethernet frame when connected directly to a router like a Cisco or a Peplink, and a dumb Ethernet switch in the middle fixed the issue. Something with a firmware update on the Starlink Ethernet adapter caused this, because early versions of the Starlink Ethernet adapter did not have this 4th dropped frame problem.

1 Like
5

Hello everyone,
I’m still seeing the same issue and would really appreciate more insight.

Quick recap : with Starlink as WAN on my Peplink (SpeedFusion enabled), I start getting packet loss once upload goes over around 8 Mbps. It’s consistent and reproducible.

I’ve tried different MTU settings and cables, same result. Has anyone found a fix or workaround? Could this be linked to a specific firmware version or a Starlink-side limitation?

If others using Starlink + SpeedFusion could share their experience (upload speed, firmware, setup details), that would really help to narrow it down.

Thanks in advance !

6

Hi everyone,

Just bumping this thread in case it got missed. I’m still experiencing the same issue and haven’t found a solution yet.

If anyone is running Starlink with a Peplink router and SpeedFusion enabled, I’d really appreciate any feedback on your upload performance or configuration (firmware version, MTU, WAN settings, etc.).

Even a confirmation that you do or don’t see similar packet loss above a certain upload rate would be very helpful.

Thanks a lot for your time and insights !

7

Hello, @JC1

Have you try to force mtu to 1500?

1 Like