If you and your bro are in the same house then the simplest way to play together is with a twisted pair LAN cable. Loads of older games use this system and is free from any internet restrictions or recording as you have a Genuine LAN connection between your PC.s. You can get the for about the price of a "Berger" world wide.
But if you are determined to use a VLAN then there are several choices but it will depend on the interest of a given HUB owner most give up after a few weeks or months. Hence your broken links.
Play against your Bro but commit to at leased 10-15 games. The first 5-10 you learn his main strategy then play in a way to defeat it .