vlan0ports="1 2 3 5*"
vlan1ports="0 4 5"

switch has 6 ports. 0-5.
0-4 are external ports
5 is the internal connection to the wrt

All ports on the same vlan are able to talk to eachother as if the vlan were a switch


External ports: 1 2 3       4  0
                | | |       |  |
               ,-------, ,-------,
               | VLAN0 | | VLAN1 |
               '-------' '-------'
                       \ /
Internal port:          5
                        |
                     ,-----,
                     | WRT |
                     '-----'

*port 0 is the "internet" port, otherwise known as the wan