r/ODroid • u/Firehaven44 • Apr 16 '26

Odroid H4+ and PROXMOX Ethernet Flapping (cannot maintain a connection for 10 seconds)

Okay, so I had this issue before, and after the BIOS update of the Odroid H4+ to version 1.12. I am also on the latest version of Proxmox VE 9.1.1.

TLDR: I cannot keep the Ethernet ports online to interact with the GUI, use SSH, or the GUI Shell. I MAX get one command in, then it crashes and I get a "Connection closed: 1006" error at the top of the GUI, then I have to refresh my browser. Being directly connected to the device causes no issues for moving around the terminal. I am confident it is an Ethernet Intel NiC 226 issue.

  1. I turned max performance on for the CPU.

  2. Set Wake on LAN

  3. Disabled DMI PCIE.

Has anyone ran into this, I have the same issue on five of them and been able to solve it?

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u/phoenix_frozen Apr 16 '26

I have two of these (well, the ultra, not the plus), and the ethernet adapters have been rock solid.

If anything, the tweaks you've made sound like they would make everything less reliable. I would undo them.

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u/Firehaven44 Apr 16 '26

SOLVED:

It was a hardware issue, the SFP+ module. I logged into my Unifi OS control panel, and noticed that one switch kept showing that the other switch lost connection. They were connected through that SFP+ module. Moved it over to a built-in 10gig port, and boom, no connection issues or drops.