I have a Cisco 2821 Router that I am setting up to be the default gateway. The router has 2 gigabit ports. Should I:
1. Use only port g0/0, set the gateway IP on this port and create a route of this port to the firewall?
2. Use both ports g0/0 and g0/1 and route g0/0 to g0/1? If I go with option 2, how does that change assigning an IP to g0/1 because I cannot use the same subnet, as well as an IP for the firewall?