How do I get internet working: SFP28 25Gb/s (Broadcom BCM57414B1KFSBG)?

[fatherboard]

Internet not working with SFP28 25Gb/s (Broadcom BCM57414B1KFSBG), Asus K14PA-U12
I have a server motherboard Asus K14PA-U12, for networking it has: 2 x SFP28 25Gb/s (Broadcom BCM57414B1KFSBG) +1 x Mgmt LAN
I run Ubuntu 24.04.3
I don't see the ethernet connection I'm used to for internet, so I searched for a LAN to SFP28, found something under the name XZSNET 1000BASE-T SFP Transceiver, SFP to RJ45, 1.25G Copper SFP to Ethernet Module.

I connected it to one of the the SFP28 and plugged my internet cable hoping to get access to internet, but it doesn't work.

I have checked in the BIOS if something is disabled under Networking and I enabled:
Network stack
IPv4 PXE Support
IPv4 HTTP support
IPv6 PXE Support
IPv6 HTTP support

I checked under the Advanced menu of the BIOS and saw the 2x Broadcom BCM57414 NetXtreme-E 10Gb/25Gb RDMA Ethernet controller, When I enter in one of these it clearly says Link Status Connected.

But still no internet. In Ubuntu when I go to Networking, I see it says connecting for a while then stops, greyed.

How do I get internet working on this motherboard?

 

[fairydreaming]

I have this exact motherboard, I use Ubiquiti UACC-CM-RJ45-1G RJ45 - 1Gbps SFP module. As far as I remember I didn't have to change anything in the BIOS, it just worked out of the box.

But try pinging your router IP, maybe it's just some configuration issue.

 

[i386]

Try a well known sfp+ to 1/10GBase-T adapter, and not the cheapest you could find on amazon ._.

 

[nexox]

"Connecting..." probably means it's trying to get a DHCP lease (I do hate guessing about what these silly GUIs mean,) use tcpdump on the host to confirm it's sending requests but not receiving responses then check the DHCP server logs on your router, if you have any, if not run tcpdump on another system on the same network segment to see if the requests are making out of the SFP module. There are likely some other useful logs on your host, finding them depends on whether you're running NetworkManager or some other backend service, just look in journalctl for the interface name for a start.