Need Help Diagnosing Network Slowdown After OPNsense Update

[Tosch]

Hi,

I've been running OPNsense as the main router for my network, with a separate server running Unraid as my NAS. In between, I have an Omada system, including a switch.

Since the latest OPNsense update, I've noticed a peculiar issue: when copying large files from the NAS to a client machine, the network speed starts at a solid 100mb/s but quickly slows down, eventually hitting zero for a few seconds. After a pause, the speed returns to 100mb/s. Additionally, sending larger files to the LAN printer results in an extended delay before they actually get printed.

I'm a bit lost on how to troubleshoot and isolate the root cause of this problem. Here's a quick overview of my setup:

• OPNsense: Main router for network traffic.


• Unraid NAS: Running on a separate server.


• Omada System: Includes a switch.

What steps should I take to narrow down and identify the issue?
Are there specific logs or diagnostic tools I should be checking on OPNsense, Unraid, or the Omada System? I'd appreciate any guidance or suggestions on how to tackle this. Thanks a bunch in advance for your expertise!

[chemlud]

Hi!

What is a Omada system including a switch?

Are the Unraid and the client copying the large file on the same interface/switch? Then the traffic should not flow through the sense...

Any bridged interfaces on the sense (aka router as a switch)?

[Tosch]

Thanks for the fast reply!

What is a Omada system including a switch?

All of my traffic (WIFI and LAN) runs on the TP-Link Omada system. The switch between opnsense and UNRAID is a TL-SG2218 v1.0

No brigdes.

Are the Unraid and the client copying the large file on the same interface/switch? Then the traffic should not flow through the sense...

Each one is connected directly to that switch mentioned (UNRAID->SWITCH; OPNSENSE->SWITCH; CLIENTS->SWITCH).
Right, that is what I was thinking, too. But my impression is, that the issue came up after the last update.


That is why I was looking for help to find the bottleneck. I'm not a network expert and get all my knowledge from tutorials, etc. Keen to go thorough it, but I don't even know where to start.

[Tosch]

One thing to add:

I do use VLANS, managed by OPNSense.

• All clients and the printer are on my standard LAN: 192.168.1.XXX
• UNRAID, though, has one physicall NIC, but I'm running a VM on it running Home Assistant on three VLANS: 192.168.1.XXX/192.168.80.XXX/192.168.20.XXX

[chemlud]

https://www.tp-link.com/se/omada-sdn/

this sounds absolutely crazy to me, with a Chinese vendor :-D

Sorry, I'm out... ;-)