Please help! Creating 2nd Subnet for Wifi connected only

[erlinden]

Sure…multiple ways to solve this.
I prefer using VLAN’s (where you can even distinguish corporate and guest network):

http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1

Update:
Looking at your hardware, two things:

• Why?
• http://forum.mikrotik.com/t/how-do-i-connect-two-subnet-in-a-single-router/149158/1