No Ipv6 via PPPoE

Installing and Using OpenWrt Network and Wireless Configuration
1

Hello,

Since approximately one month my home is connected by fiber. In the following I've banned the ISP provided router.
Right for root!
All worked like a charm for about two weeks, but then the wan interface lost it's public IPv6 adress.
After calling the support hotline of the ISP I've tried the provided Fritz!Box (by AVM) and it's got an real IP immediately. So there must be something wrong with the configuration on the wan interface.
The router is attached to the ISPs fibre modem by ethernet and I've got an username and a password from the isp

Hardware:
Cudy WR3000 v1
Software:
OpenWrt 24.10.0 r28427-6df0e3d02a / LuCI openwrt-24.10 branch 25.014.55016~7046a1c

>>> ip a
(..)
3: wan@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue st
ate UP qlen 1000
    link/ether 80:af:..... brd ff:ff:ff:ff:ff:ff
    inet6 fe80::82af:...../64 scope link
       valid_lft forever preferred_lft forever
(..)

39: wan.7@wan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP qlen 1000
    link/ether 80:af:...... brd ff:ff:ff:ff:ff:ff
    inet6 fe80::82af:....../64 scope link
       valid_lft forever preferred_lft forever
42: pppoe-wan: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1492 qdisc
fq_codel state UNKNOWN qlen 3
    link/ppp
    inet 100.66.223.59 peer 100.66.0.1/32 scope global pppoe-wan
       valid_lft forever preferred_lft forever
    inet6 fe80::....../128 scope link flags 02
       valid_lft forever preferred_lft forever

>> /etc/config/network

config interface 'wan'
        option proto 'pppoe'
        option device 'wan.7'
        option username '***@tng-vdsl'
        option password '***'
        option ipv6 'auto'

>>> Firewall
config zone
        option name 'wan'
        option input 'ACCEPT'
        option output 'ACCEPT'
        option forward 'REJECT'
        option masq '1'
        option mtu_fix '1'
        list network 'wan'

I've also tried to set the option ipv6 to '1' "(manual) and created an ipv6 DHCP client interface @wan, @wan.7 or @pppoe-wan. Nothing got an public ipv6 address.

Please help me to get an public accessible address.
Thank you!

Regards,

Olias

2

I lost my IPv6 connection when I changed routers but it was only recently that after watching this I got it back.
It was a simple change to Device name to an Alias Interface that did it as per the directions starting at 4.40 in the video or in the transcript Special Case PPOE
https://www.onemarcfifty.com/blog/video/IPv6_with_OpenWrt/

3

Which ISP is this? There are some examples in the wiki.

4

Please enable PPP debugging by adding the line debug to /etc/ppp/options and post the logs. The config you posted is correct and should be sufficient.