I currently have a frame relay connection that was between 4 remote locations and our home office. Due to downsizing we will be eliminating the frame and going to a local ISP for the remaining 2 branch locations. I have a Cisco 2610 router that is connected to the internet in our main office. This has 2 fast ethernet ports - 1 connected to the internet, 1 connecting the lan to the internet. I also have a Cisco 3620 that was the backbone to the frame relay which will be eliminated. I want to provide connection to the lan at our main office as well as the lan in the branch office using the internet router(2610). Can the fast ethernet port on the 2610 be configured with subinterfaces for the branch network to be able to connect similar to the frame router?