btw, normally is PPPoE used or just DHCP ?
If DHCP, you can enable a mirror of PON traffic to LAN port.
Something like:
diag mirror set mirroring-port 1 mirrored-port 2 rx-mirror tx-mirror
where:
PON port = 2
LAN port = 1 (in 1x1G version)
LAN port = 0 (in 1x2.5G version)
You will be able to see frames from PON port, but as counter shows, it will be only multicast..
There is some option, that original ONT (router) works in VEIP mode - so requires existance of VEIP interface.
This ONT supports EthernetUNI.
To support VEIP, it is necessary to emulate it, that is possible in dedicated firmware.
Why ?
There is a refence to:
AssociatedMePoint: 0x06
in ExtVlanTag...
And there is no such MePoint in ONT, so probably it is not finished, so no info about vlans and so on.
The only vlan that may work, is 101, but I'am not sure if this is not for management purpose only..
Original ONT you have is from ALU/Nokia (firmware version format points to that vendor).
What is the model ?