I have 4 Cisco 2960 switches in a stack and they are connected to a stack of layer 3 3850's. I want to create a vlan for finance traffic on the LAN. Do I create the vlan on the 2960's and if I do would other computers not in that vlan be able to access the computers in that vlan through the layer 3 switches? Do I also need to create the vlans on the layer 3 switches?
Note trunking between the layer 2 and layer 3 switches is already set up.