Can't Connect to CenturyLink Fiber with RAX80

Recently purchased RAX80 and could not connect to CenturyLink Fiber. I believe they have their own modem/router installed in garage that connects to ONT outside.  I have Netgear R8500 that I am trying to replace, it does connect but has wireless issues so that is why I am replacing. When new it just connected up and I saw the internet. I am not sure I can log into their modem/router to put in bridge mode. Centurylink says we are not PPPoE but we are IPOE.  Will it work if I just set my VLAN tag to 201 ?  Or do I have to bypass their router as it exists in my garage now.