Have you tried connecting a laptop to that ethernet port?
Typically there are only 2 reasons why a wired connection doesn’t work properly -
1 - bad cable (all ready ruled out)
2 - Failure to get a valid IP address (DHCP)
Assuming you have a flat network without any VLANs, DHCP should not fail unless your router has MAC filtering turned on or your bridge is not passing broadcast packets for some reason.
If you do have VLANs, you need to make sure your DHCP server is providing IPs on that VLAN. Generally broadcast packets will not traverse a VLAN or a VRF.
A possible 3rd failure mode is duplicate IP addresses, but that is very rare and any properly configured network should not have that problem.
-Tom