No IPv6 with GT-AX11000 Pro - ISP dual stack Spectrum San Diego

[josephwit]

Trying to enable IPv6 on Spectrum San Diego internet with Asus GT-AX11000 Pro router.

Spectrum tells me they have fully dual stack IPv4 and IPv6 available; WAN connection is Automatic IP, for which Asus guides say the IPv6 setting is "Passthrough". I see some intranet IPv6 addresses in my connected devices list, but test-ipv6.com and similar sites say I have no WAN IPv6 address. What settings am I missing?

I started with default ISP DNS servers. I have since switched to assigned servers and DNS over TLS, but the IPv6 issue was occurring BEFORE I changed any of those settings.

My understanding is that "dual stack" and "passthrough" means that the ISP should automatically assign my connection a WAN IPv6 address, same as it does for IPv4, is that right?

 

[dave14305]

Start with Native for IPv6 and see if you get a WAN IPv6 address and a delegated IPv6 prefix for the LAN.

 

[Analog-1]

As Dave said you need Native not passthrough.

 

[josephwit]

Start with Native for IPv6 and see if you get a WAN IPv6 address and a delegated IPv6 prefix for the LAN.

I tried native, that’s what I remember working in the past with my old router. There are a bunch of additional settings with native that I am not familiar with. I started with the default and tried to research and play with them a little bit, but nothing worked.

 

[josephwit]

My setttings now - IPv6 Native, DHCP-PD, stateless, connect to server automatically, enable advertisement all enabled (default). Those are the only available settings on IPv6 tab. I have rebooted cable modem. No WAN IPv6.

WAN connection type Automatic IP (correct for Spectrum). I previously tried these settings with default DNS settings and no WAN IPv6 (Get DNS IP from ISP automatically, privacy protocol none). I have since assigned DNS servers and DNS over TLS privacy, see attachment. No idea what DNS rebind and DNSSEC are, but I didn't change them. Again, I definitely had no WAN IPv6 with the default DNS settings, so I don't think the issue would be here.

Help?

 

[josephwit]

My IPv6 tab settings. See above.

 

[Analog-1]

Did you reboot the modem and then router.

 

[josephwit]

So System Log seems to show that a WAN IPv6 address is assigned by the router. It is not getting through my ISP (Spectrum). Spectrum is saying it has to be my router, which they of course don't support...
??

 

[dave14305]

So System Log seems to show that a WAN IPv6 address is assigned by the router. It is not getting through my ISP (Spectrum). Spectrum is saying it has to be my router, which they of course don't support...
??

This looks correct to me. You have a WAN and LAN IPv6.

What IPv6 routes do you see on the Routing Table page?

 

[josephwit]

attached

 

[dave14305]

attached

Is there an entry for default?

 

[josephwit]

the help for the site test-IPv6.com says:
"If you strongly believe you have IPv6, but we were unable to detect it: it means one of a couple of things. Either your organization is blocking the use of IPv6 to talk to the outside Internet through network policy; or perhaps what you see with IPv6 on your host is not a global address. Any address starting with "::", "fc", "fd", or "fe" are unable to work with the public IPv6 Internet."
Routing table shows fe:. Not public address? don't understand...

 

[josephwit]

Is there an entry for default?

default what?

 

[josephwit]

I'm reading that IPv6 address starting with fe: is a private address - like self-assigned IPv4 starting with 169.x.x.x? Why do I have that?>

 

[dave14305]

I'm reading that IPv6 address starting with fe: is a private address - like self-assigned IPv4 starting with 169.x.x.x? Why do I have that?>

That’s OK. This is my IPv6 routing table. At the end is a default route pointing to my ISP’s link local address of their next hop.

# ip -6 route list
2001:558:dead:2c:beef:4fc8:ea6c:74ba dev eth5 proto kernel metric 256 pref medium
2601:beef:cafe:a86::/64 dev br0 proto kernel metric 256 pref medium
fe80::/64 dev eth1 proto kernel metric 256 pref medium
fe80::/64 dev eth5 proto kernel metric 256 pref medium
fe80::/64 dev spu_us_dummy proto kernel metric 256 pref medium
fe80::/64 dev spu_ds_dummy proto kernel metric 256 pref medium
fe80::/64 dev eth6 proto kernel metric 256 pref medium
fe80::/64 dev eth7 proto kernel metric 256 pref medium
fe80::/64 dev br0 proto kernel metric 256 pref medium
fe80::/64 dev eth0 proto kernel metric 256 linkdown pref medium
fe80::/64 dev eth2 proto kernel metric 256 linkdown pref medium
fe80::/64 dev eth3 proto kernel metric 256 linkdown pref medium
fe80::/64 dev eth4 proto kernel metric 256 linkdown pref medium
default via fe80::232:5cff:feae:babe dev eth5 proto ra metric 1024 expires 1797sec pref medium

 

[josephwit]

Weird. So if I copy what my log shows is my. WAN IPv6 address and do a DNS look up on it, it comes back Charter Spectrum. So the address is out there. Why do all the sites like Test-IPv6.com say I have no IPv6 address?

 

[dave14305]

Weird. So if I copy what my log shows is my. WAN IPv6 address and do a DNS look up on it, it comes back Charter Spectrum. So the address is out there. Why do all the sites like Test-IPv6.com say I have no IPv6 address?

The router needs to know where to forward IPv6 traffic to in your ISP network. That’s why I ask about a default route.

 

[sfx2000]

Give this URL a try...

vsix.us IP Tests

 

[josephwit]

The router needs to know where to forward IPv6 traffic to in your ISP network. That’s why I ask about a default route.

Every setting on the IPv6 tab and WAN tab besides the DNS assignment are default. DNS settings were previously default and it still didn’t work.
What setting tells the ISP where to forward?

 

[dave14305]

Every setting on the IPv6 tab and WAN tab besides the DNS assignment are default. DNS settings were previously default and it still didn’t work.
What setting tells the ISP where to forward?

was this the full output? Nothing else after it?

The router learns the default route from router advertisements sent by the ISP periodically to the WAN interface.

Can you login via ssh to the router and run some commands?

ip -6 route list
cat /tmp/wan0_bound6.env