@Joseph-TP Thanks for the answer, I did the tests here, but I didn't get any results, because on the first router, I configured everything correctly, I left it as an access point, and the internet is working, on the second router, I put the network cable in port 4 (lan/wan) and I'm not having success, because the router simply doesn't have communication with the first router, remembering that I have two routers of the same model, the xx230v
Joseph-TP wrote
Hello @Renan-Santos ,
Welcome to our community.
According to Google Translate, your question is that you failed to set up the second router. If there is any discrepancy, please describe it in English.
If you only want to expand the network via Ethernet cable, please connect the cable to the LAN4/WAN Ports of the second router.
For the Internet Connection Type option, please select Dynamic IP.

It is recommended that you can change it to Access Point mode to avoid double NAT. Please refer to BBA GPON_User Guide (from page 44)
But if you want to create an EasyMesh Network, please note that XX230v cannot work as an agent. So you can consider replacing it with another device that supports agent mode in the EasyMesh network.
Best Regards.
Thanks for the answer, I did the tests here, but I didn't get any results, because on the first router, I configured everything correctly, I left it as an access point, and the internet is working, on the second router, I put the network cable in port 4 (lan/wan) and I'm not having success, because the router simply doesn't have communication with the first router, remembering that I have two routers of the same model, the xx230v