This may be a sizable leap in debugging, but for strange networking issues, I’ll usually start Wireshark and monitor whatever traffic is coming from the ISP’s equipment, looking for clues. A really nice clue would be something like VLAN tagged traffic, which would indicate the ISP requires a certain VLAN ID. Or perhaps you could see if your DHCP requests are being answered or not.
I do recognize that this sort of network sleuthing is as much art as it is science, so your mileage will vary.
Thanks! Yeah I’m actually not totally sure my networking skills are up to snuff. But there is some vlan stuff in the admin interface of the isp’s router. So I would just copy the vlan id over to the correct place in the asus router?
If the ISP router has a VLAN ID configured, there’s a possibility that they strip it before passing through to your equipment, so you wouldn’t need to configure it on your end. So while there’s no guarantee copying the VLAN ID will work, it could still be worth a try.
My router doesn’t allow vlan, it’s an asus zenwifi xd8. But I figured it out. I was making it too complicated. I thought I was supposed to put my static IP into the wan configuration, but I just set it to auto configuration and put the isp provided ont/router in bridge mode and I’m good to go! I think I must have fucked something up early on without realizing and went way down the rabbit hole. What’s weird is that a traceroute is still showing that I’m on CGNAT even with a public ip.
I’m getting this entry as the last hop before it hits my isp provided ont: customer-GDL-PUBLIC-CGN Also it is strangely hitting 10 hops for a tracert to google, with about 5 of them being on the 10.3.x.x addresses.
Also, would it make sense for the ont to even have an ip address if it’s in bridge mode?
The ONT can still have an IP address independent of pass-through mode; this is often done so the ONT can be remotely trouble shooted by the ISP, although if they’re burning a public IPv4 address to do this… that’s just wasteful.
As for CGNAT, I think what matters is whether other hosts on the Internet can see the address your router has configured. I like to check wtfismyip.com
Traceroute has some known deficiencies, or rather it is often used for things it wasn’t meant for, so I wouldn’t necessarily put too much concern behind what it reports for the intermediate routers. If you’ve got a pubic IP address and it behaves like one to your applications, then you should be good to go.