I had this working in the past, but I did not save my full config.
I usually run from live iso. So do not have a config saved.
show version
Version: VyOS 1.4-rolling-202204300743
Release train: sagitta
Built by: autobuild@vyos.net
Built on: Sat 30 Apr 2022 07:43 UTC
Build UUID: 08bb31cf-725e-4cc3-b5c0-b18d2b6a1ef1
Build commit ID: 8d31e8b0891959
Architecture: x86_64
Boot via: livecd
System type: bare metal
My ISP has dhcpv6 pd, and I have /48 available. But of course I want to delegate single /64 to LAN interface.
[edit interfaces]
vyos@vyos# show
ethernet eth0 {
address 10.0.0.1/24
description LAN
hw-id e4:xxxx
}
ethernet eth1 {
address dhcp
address dhcpv6
description WAN
dhcpv6-options {
pd 0 {
interface eth0 {
address 1
sla-id 1
}
length 64
}
}
hw-id e4:xxxxx
ipv6 {
address {
}
}
}
...
[edit service router-advert]
vyos@vyos# show
interface eth0 {
default-lifetime 300
default-preference high
interval {
max 30
}
link-mtu 1500
name-server 2606:4700:4700::1111
name-server 2606:4700:4700::1001
other-config-flag
prefix ::/64 {
preferred-lifetime 300
valid-lifetime 900
}
reachable-time 900000
retrans-timer 0
}
But that does not work.
vyos@vyos:~$ show interfaces
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface IP Address S/L Description
--------- ---------- --- -----------
eth0 10.0.0.1/24 u/u LAN
2a02:yyy:xxxx::1/48
eth1 85.A.B.C/25 u/u WAN
2a02:yyy:zzzz:3::909/128
2a02:yyy:zzzz:3:aaaa:bbbb:cccc:dddd/64
And because /48 is assigned to eth0, the prefix ::/64 for radvd does not pick it.