For this to work would I need to assign the Gig0/1 interface an IP address of 11.1.1.2? Since at the moment that address doesn't exist anywhere. 

I thought the guest network switch would be fine if I gave it a different IP address, since the one on the left falls under 11.1.1.1 and the one on the right falls under 11.1.2.1. Is doing that simply not enough to avoid issues?And regarding routing,...

Thanks for the response, I haven't seen the decimal notation before when configuring interfaces, nor the dot1q command, do they function the same as using the 'interface vlan ##' command?Looking at my project again, the multilayer switch that I have ...