martb@rauter# set interfaces pppoe pppoe0 address 'dhcpv6' 
[edit]
martb@rauter# comp
[interfaces pppoe pppoe0]
+ address "dhcpv6"

vyos@vyos# show interfaces pppoe pppoe0 | strip-private
+address dhcpv6
 authentication {
     password xxxxxx
     username xxxxxx
 }
 dhcpv6-options {
     duid xx:xx:xx:xx:xx:12:xx:xx:xx:xx:xx:b9:xx:xx:xx:xx:xx:94
     pd 0 {
         interface bond0.1 {
             address 1
             sla-id 0
         }
         interface bond0.1001 {
             address 1
             sla-id 1
         }
         interface bond0.1002 {
             address 1
             sla-id 2
         }
         interface bond0.1003 {
             address 1
             sla-id 3
         }
         interface bond0.2001 {
             address 1
             sla-id 257
         }
         interface eth2 {
             address 1
             sla-id 4
         }
         interface eth3 {
             address 1
             sla-id 10
         }
         length 48
     }
 }
 ipv6 {
     address {
         autoconf
     }
 }
 mtu 1500
 no-peer-dns
 source-interface bond0.4002
[edit]
vyos@vyos#

[ interfaces pppoe pppoe0 ]
Traceback (most recent call last):
  File "/usr/libexec/vyos/services/vyos-configd", line 156, in run_
script
    script.apply(c)
  File "/usr/libexec/vyos/conf_mode/interfaces_pppoe.py", line 132,
 in apply
    p.update(pppoe)
  File "/usr/lib/python3/dist-packages/vyos/ifconfig/pppoe.py", lin
e 124, in update
    super().update(config)
  File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py",
 line 1831, in update
    self.add_addr(addr, vrf_changed=vrf_changed)
  File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py",
 line 1286, in add_addr
    elif not is_intf_addr_assigned(self.ifname, addr, netns=netns):
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/vyos/utils/network.py", line
 454, in is_intf_addr_assigned
    if ip_interface(addr) == interface or address == addr:
       ^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/ipaddress.py", line 117, in ip_interfac
e
    raise ValueError(f'{address!r} does not appear to be an IPv4 or
 IPv6 interface')
ValueError: 'd' does not appear to be an IPv4 or IPv6 interface

script
    script.apply(c)
  File "/usr/libexec/vyos/conf_mode/interfaces_pppoe.py", line 132,
 in apply
    p.update(pppoe)
  File "/usr/lib/python3/dist-packages/vyos/ifconfig/pppoe.py", lin
e 124, in update
    super().update(config)
  File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py",
 line 1831, in update
    self.add_addr(addr, vrf_changed=vrf_changed)
  File "/usr/lib/python3/dist-packages/vyos/ifconfig/interface.py",
 line 1286, in add_addr
    elif not is_intf_addr_assigned(self.ifname, addr, netns=netns):
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/vyos/utils/network.py", line
 454, in is_intf_addr_assigned
    if ip_interface(addr) == interface or address == addr:
       ^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/ipaddress.py", line 117, in ip_interfac
e
    raise ValueError(f'{address!r} does not appear to be an IPv4 or
 IPv6 interface')
ValueError: 'd' does not appear to be an IPv4 or IPv6 interface