Zyxel Keenetic Giga II ipv6 routing

Question

I've got a Zyxel Keenetic Giga II router (firmware version 2.15). I'm connecting to the Internet through L2TP (L2TP0) over LTE (UsbLte0). LTE interface has no IPv6 address attached, so my goal is to obtain IPv6 address over L2TP. Here are the relevant parts of my config:

(config)> show running-config 
! $$$ Model: ZyXEL Keenetic Giga II
! $$$ Version: 2.06.1
! $$$ Agent: http/rci
! $$$ Last change: Tue, 16 Jul 2019 06:32:07 GMT
! $$$ Md5 checksum: 446f15b38e231ae9075d9db684ae20bd
system
    ...
    set net.ipv6.conf.all.forwarding 1
    set net.ipv6.conf.all.accept_ra 1
!
...
interface UsbLte0
    description "USB LTE"
    usb device-id 12d1 1506
    usb apn internet
    security-level public
    ip address dhcp
    ip dhcp client dns-routes
    ip dhcp client name-servers
    ip global 16908
    up
!
interface Bridge0
    rename Home
    description "Home network"
    inherit GigabitEthernet0/Vlan1
    include AccessPoint
    mac access-list type none
    security-level private
    ip address 192.168.5.1 255.255.255.0
    ip dhcp client dns-routes
    ip dhcp client name-servers
    ipv6 address auto
    up
!
interface L2TP0
    description <hdden>
    role misc
    peer <hidden>
    ipv6cp
    lcp echo 30 3
    ipcp default-route
    ipcp name-servers
    ipcp dns-routes
    no ccp
    security-level public
    authentication identity <hidden>
    authentication password <hidden>
    authentication chap
    ip dhcp client dns-routes
    ip dhcp client name-servers
    ip mtu 1400
    ip global 49325
    ip tcp adjust-mss pmtu
    ipv6 address auto
    ipv6 prefix auto
    ipv6 name-servers auto
    ipv6 force-default
    connect via UsbLte0
    up
    bandwidth-limit 3621
!
...
ipv6 subnet HomeV6
    bind Home
    number 3
    mode slaac
!
ipv6 local-prefix default
ipv6 name-server 2001:4860:4860::8888 ""
ipv6 name-server 2001:4860:4860::8844 ""
ipv6 firewall
...

So far I've got a working IPv6 connection on router itself (I can connect to it via SSH, and there I can execute ping -6 google.com), but it does not work on any of the hosts connected to it.

There's some information about connection from the host:

 ❯ ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 fdb6:e163:9f30:3:e2a6:5615:57de:66a5/64 scope global dynamic noprefixroute 
       valid_lft 4294966395sec preferred_lft 4294966395sec
    inet6 fe80::f23f:9eee:2abf:3cdd/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
 ❯ ip -6 route
::1 dev lo proto kernel metric 256 pref medium
fdb6:e163:9f30:3::/64 dev enp5s0 proto ra metric 100 pref medium
fdb6:e163:9f30::/48 via fe80::ee43:f6ff:fe08:9400 dev enp5s0 proto ra metric 100 pref medium
fe80::/64 dev enp5s0 proto kernel metric 100 pref medium

I've tried typing ip -6 route add default dev enp5s0 manually, does not help. I've also tried to install radvd on router and advertise IPv6 using it, still nothing. What else am I missing?

Zyxel Keenetic Giga II ipv6 routing

0 Answers0