Using Fiber Optic Internet on Flint (GL-AX1800) OpenWrt Home Router
Recently switched to CenturyLink for their affordable fiber service, but I don’t want to use the router/modem they provide. Therefore, I figured out how to use fiber with Flint (GL-AX1800) router instead.
When it comes to fiber optic internet, your service provider will install an optical network terminal (ONT) for you. In my case, CenturyLink gave me one ONT and a router, however, I want to use my own router and hook it up using an Ethernet cable capable of fiber-optic speeds. Using your own router might save you money, because many providers charge a monthly fee for supplying rented routers to customers. For me, I prefer the OpenWrt system for online privacy and customization! And, Flint has all I need!
When the CenturyLink technician visits you to set up the service, you should ask the person to write down the PPPoE username and password before he or she leaves. The username is usually firstname.lastname@example.org, and the password is randomly generated.
Step 1: Set up Flint (GL-AX1800) and get into LuCi interface
I could follow the instructions to set up Flint easily. After that, I logged into the web admin panel via its default LAN IP (192.168.8.1) and then go to MORE SETTINGS > Advanced to install LuCi interface. LuCi is the default web interface of OpenWrt. When it’s installed, you can visit LuCi via a link 192.168.8.1/cgi-bin/luci, where you might need to enter your admin password again.
STEP 2: Set up VLAN Tagging on WAN
To use fiber-optic internet, we need to use a feature called VLAN tagging. The ISP technicians usually don’t tell you much details, but I googled it out that CenturyLink uses 201 as VLAN ID. VLAN tagging is located in Network > Interface > WAN, and then click “Edit”.
You will see the General Setup page of WAN, where you need to choose PPPoE protocol and add your PAP/CHAP username and password. The technician told me that the username is just the name part without “@centurylink.com”. I just did what he said and then click “Save & Apply”.
Then we go to the Physical Settings tab to find the option called Custom Interface. If your ISP uses xx as VLAN ID, you just need to input “eth0.xx” and xx is the VLAN ID number. As I mentioned, CenturyLink uses VLAN Tag 201 on WAN, so I input “eth0.201” and then click “Save & Apply”.
These are all the steps. If it doesn’t work right away, you might need to reboot the router to let the new settings take effect.
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