This is what I do for my own LAN :
- Create VLAN Interfaces
Please note you should NOT configure a gateway on those!
Just the IP address and Subnet is enough
- Make sure all running services are bound only to the main non-VLAN Interface to avoid exposure of those in the wrong VLAN's.
- Add the additional VLAN interfaces to FTLDNS a.k.a. DNSmasq like so :
/etc/dnsmasq.d$ cat 101-my.settings
interface=eth0.10
interface=eth0.100
interface=eth0.254
And then restart FTLDNS ofcourse to make sure this actually works 
Any Static IP using Clients or DHCP Server configuration would obviously need some adjusting too on the VLAN's you are using!