Certainly seems good enough to route 2.5gbe, although the router will be doing things other than just sending traffic (NAT, packet inspection for firewalls, etc

Certainly seems good enough to route 2.5gbe, although the router will be doing things other than just sending traffic (NAT, packet inspection for firewalls, etc.) You need the drivers though. Looks like rtl8125b support landed in Linux 5.9, but as far as I can tell VyOS and OpenWRT are still on 4.x, so you'll likely be in custom land - either upgrading to 5.9, backporting the driver, or using the realtek-provided driver. Looks like people are working on it recently for openwrt: https://forum.openwrt.org/t/setup-an-odroid-h2-with-openwrt/72792/8 https://forum.openwrt.org/t/setup-an-odroid-h2-with-openwrt/... I'm only using gigabit at home, so didn't need 2.5g.