Hi Lazaros,
I have attached a network that I recently created and in making the network i decided not to use vtp this time and on sw3 if I had a vlan only on that switch would I still have to add it to the other switches in order to create intervlans via the routers attached to the outside switches and then apply hsrp to each intervlan? for hsrp i need to put the same intervlans on both routers with different ips in the same subnet to make hsrp work with the intervlans correct? (so I would assign for example on RTR1 int gi0/1.12 with 192.168.7.2?)