USG LITE 60AX and IPv6 support

Lohkamp

I have an AVM FRITZ!Box 6890 LTE that worked marvellous with both IPv4 + IPv6 on a German Telekom VDSL incl. port forwarding and am quite shocked that our new USG LITE 60AX does not seem to support IPv6 to the internet or even DNS forwarding.
nslookup anysite.xy
is not answered but ping is working, however only with IPv4.
Was is a real big step back to replace the FRITZ!Box as a router by the USG LITE 60AX?
The FRITZ!Box is without any configuration change (except the IPv4 subnet) connected to the WAN port of the 60AX.

teRceLde

Same here with a Zyxel SCR 50AXE. There is no IPv6, neither in the WAN nor the LAN, no IPv6 Router-Advertisements, no stateless DHCPv6 server, no stateful DHCPv6 server. There are no configuration options regarding IPv6 in the Nebula Control Center (NCC).

Surprisingly, when you reset the Zyxel, it did IPv6 on top of PPPoE for me. Double checked via a switch in Port Mirroring mode. And then there was SLAAC plus stateless DHCPv6 in the LAN. However, all that disappears when first configured via NCC.

Consequently, already IPv6 web surfing does not work. I do not even think about offering a service via a IPv6 firewall, or even IPv6 prefix delegation for router cascading. As of today, Zyxel SCR and USG Lite series are IPv4-only devices. Although at least IPv6 surfing should be a de-facto feature for 13 years now, its lack is nowhere documented?

The FRITZ!Box is […] connected to the WAN port of […].

Not sure I got that.

If you use a router like the Zyxel via WAN/DHCP attached to FRITZ!Box, you have to enable IPv6 Prefix Delegation: fritz.box → Heimnetz → Netzwerk → (Reiter) Netzwerkeinstellungen → (Taste) weitere Einstellungen → (Taste) IPv6-Adressen → DHCPv6-Server in der FRITZ!Box für das Heimnetz aktivieren: DNS-Server und IPv6-Präfix (IA_PD) zuweisen. This is disabled on default.

If you use a router like the Zyxel via WAN/PPPoE attached to a FRITZ!Box, you have to enable PPPoE Passthrough. This is disabled on default. If your Internet Service Provider (ISP) does not allow multiple logins, you have to set „Zugangsdaten“ to „Nein“ which sets the FRITZ!Box itself to WAN/DHCP and allows the attach router do the single PPPoE login.

I am using a pure, simple modem in front of my Zyxel, still no chance for IPv6.