So I have a very similar problem to fbradyirl in this thread:
But have much less knowledge of anything networking related
I heard great things about openWRT, and decided to flash my Archer C7 V5 with it without looking into what kind of knowledge/skill level is needed to use it well.
I can't get a connection to my ISP, despite what I've tried to pick up from Youtube videos and the wiki documentation.
Like fbradyirl, I am using Eir FTTH with the exact same setup on my wall, but my router model differs (TP-Link Archer C7 v5).
After giving up I've done a reset to defaults and am hoping someone has the time to help a dumba** like me out.
Any advice or guidance will be greatly appreciated, and I'll try to get any info you need ASAP.
Ok if we assume you are in exactly the same situation as the previous post... Go to the bottom, click add to add a vlan. In the new vlan number it 10, go to the CPU column and make it tagged, and go to the wan port column, make it OFF in vlan 1 and 2, and tagged in vlan 10. Make vlan 10 off in the lan1-4 ports.
After saving, go to the interfaces page, slect the WAN interface, select the physical settings tab and select eth0.10 as the wan physical port.
After saving and applying you will have internet, if your situation is the same as quoted post.