Vyos 1.3 pppoe server ipv6 not giving prefix to client

hello, I have a problem related to the PPPoE server IPv6 where the client does not get the prefix from the PPPOE server, even though the PPPOE status is already connected. I use vyos version 1.3 epa3 as a pppoe server and ZTE GPON F670L as a pppoe client.

status pppoe server on vyos

najib@02.DR-XXX:~$ show pppoe-server sessions | match najib
ppp2 | najib | | | | 44:59:43:27:36:66 | | active | 00:07:46 | 1.2 KiB | 346 B

pppoe client configuration on ZTE GPON

pppoe client Status on ZTE GPON

Please share your VyOS configuration of PPPoE server and VyOS version nunber

the following is for the vyos configuration and version I’m using.

set service pppoe-server authentication mode ‘radius’
set service pppoe-server authentication radius server xxxxx.tld key xxxxxx
set service pppoe-server authentication radius server xxxxx.tld key xxxxxx
set service pppoe-server authentication radius source-address ‘xxx.xxx.54.171’
set service pppoe-server client-ip-pool subnet ‘xxx.xxx.0.0/16’
set service pppoe-server client-ipv6-pool delegate xxxx:xxxx:11::/48 delegation-prefix ‘56’
set service pppoe-server client-ipv6-pool prefix xxxx:xxxx:12::/48
set service pppoe-server gateway-address ‘xxx.xxx.251.118’
set service pppoe-server interface eth5.3001 vlan-range ‘2-4000’
set service pppoe-server name-server ‘xxx.xxx.24.10’
set service pppoe-server name-server ‘xxx.xxx.33.254’
set service pppoe-server name-server ‘xxxx:xxxx:4860::8888’
set service pppoe-server ppp-options ipv6 ‘allow’

:~$ show version

Version: VyOS 1.3.0-epa3
Release train: equuleus

Built by: Sentrium S.L.
Built on: Sun 31 Oct 2021 17:38 UTC
Build UUID: 383e45ad-b32a-4359-8183-9baacc8e69d9
Build commit ID: bb511522cc3bb2-dirty

Architecture: x86_64
Boot via: installed image
System type: bare metal

Hardware vendor: Dell Inc.
Hardware model: PowerEdge R630
Hardware S/N: G5LSJ82
Hardware UUID: 4c4c4544-0035-4c10-8053-c7c04f4a3832

Copyright: VyOS maintainers and contributors

hello,
try replacing the pppoe-server options:
set service pppoe-server ppp-options ipv6 prefer