One of a device on LAN side connect to WAN side directly

RouterOS General
1

I have a TV device, it should be connected to the VDSL modem directly.
And my RouterOS WAN side is also connected to the VDSL modem and used the PPPoE to connect the internet.

I want to make the TV device share the internet cable on the LAN side of RouterOS.
So, how can i set up the RouterOS, to make one of device (catched by mac address)

  1. do not get the DHCP IP from RouterOS LAN side.
  2. do not go through PPPoE.
  3. connect to the VDSL modem directly as WAN side of RouterOS.

many thanks.

2

A fairly simple way to do this is bridging. Make the RouterOS device act as a bridge for the port coming from the vDSL modem. Move all of the WAN or ether1 configuration away from the Ethernet interface and up to the bridge.

To keep it simple, let’s focus on just software bridging.

  1. Remove ether1 and ether2 from the master port.
/interface ethernet [ find where default-name=ether1 ] name=eth1 master-port=none
/interface ethernet [ find where default-name=ether2 ] name=eth2 master-port=none
  1. Create a bridge and add eth1 and eth2 to it
/interface bridge add name=br-wan1 protocol-mode=rstp disabled=none
/interface bridge port add bridge=br-wan1 interface=eth1
/interface bridge port add bridge=br-wan1 interface=eth2
  1. Alter your PPPoE and firewall configuration as needed to reflect br-wan1 where you used to have WAN or ether1 from an Internet perspective.