We will have a new branch office in a building next door which about 400 meters. Between the branch and main office, cables can go through carpark and then up to the riser.
As all internet, phones server and servers are all located in main office and the new branch will have about 150 staff, I am thinking setup a stack of Cisco switches on new branch and connect to the switch in main office with a new fiber without setup VPN. so that the branch staff can access to the main office facility.
In terms of network and redundancy, can I have your comments and idea please?