Let me explain the scenario:
1) I have a Linksys router that is connected to the ISP.
2) RB750GL/RB750UP is connected via ethernet to the Linksys router.
3) A modem is connected via ethernet to the RB750GL/RB750UP. (SEE ATTACHMENT)
The internet traffic coming from the Linksys router is untagged.
The modem only receives and transmits TAGGED traffic. (Let us say VLAN 100)
Therefore the intermediate device RB750GL/RB750UP must VLAN tagged 100 the Internet traffic from the Linksys and forward the internet traffic through a port to the modem.
However in order to have a complete and functional modem, i do not know if the VLAN tagged 100 traffic going from the modem to the Linksys must be stripped off of its VLAN ID 100.
Please i am beginner at this. I need all the required, yet detailed, steps for me to achieve a working solution.
I don't know whether we must simply do VLAN tagging for the traffic or even apply an IP for the VLAN.
All help is appreciated!