R4 SFP± DAC recommendations

I’m interested in buying a 2ft passive dac for a R4 in the future. Any recommendations for connecting to a cheap switch? Or anything I should watch out for?

I think in Serve the Home’s video they mention that there can be issues. I bought a switch similar to QNAP QSW-2104-2T-A

I have the QNAP QSW-2104-2S not cheap but works well (uses a Broadcom chip). Since I brought it Realtek has released its own chip and you can now find copy of that switch for about 30-35€ on Aliexpress (link) and they should works as well.

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I’m using this https://www.aliexpress.com/item/1005005780965130.html with my R4 connecting it to my Zyxel xgs1930-28 and it works flawlessly.

I can confirm https://www.aliexpress.com/item/1005006373736990.html works for me