I wirite this post as a last resource… In our enterprise, we have an OTN that provides Internet by fiber. We replace the router of the fiber company to a Mikrotik RB750GL (RouterOS 5.24), that it’s placed before a Firewall SonicWall TZ210.
Internet → Mikrotik → SonicWall TZ210 → LAN
We configure a PPoE client into the Mikrotik and receive the public IP address correctly, and we have internet. But we need to configure it to be a transparent/bridged router, and we can’t or dont be capabable to do it… We need opened all the ports, alls the protocols to be managed by the sonicwall. And we need that the public ip adress, go to the sonicwall for the vpn clients, etc..
It’s possible it will be obviously for us, but we can’t make it… When we put the wan and lan interface into a bridge, we stole the internet acces… And we can redirect the wan public ip adress, to the sonicwall ip…
I assume that the SonicWall unit has no PPPoE client?
You may have a difficult combination there. If you simply want all the traffic to go to the SonicWall you could use Netmap to map the public IP to a private IP on the SonicWall - all traffic would flow and the SonicWall would control port access.
OK - so the Sonicwall does have a PPPoE client but can’t be told to have the PPPoE client use a VLAN? If that is the case try this:
Configure the PPPoE client on the Sonicwall
Remove the config from the Routerboard then:
Add a VLAN 6 interface to the port you will use to connect to the ONT
Add a bridge
Add the VLAN 6 interface to the bridge as a port
Add the interface connecting to the Sonicwall to the bridge as a port
That should take your PPPoE request from the Sonicwall and push it to the ONT on VLAN6.