Basic router config for R1, R2, R3 and ISP: Password for console=cisco Password for enable mode=ccna Password for vty =class 4. Install OSPF as the routing protocol on R1,R2 and R3. DO NOT advertise all subnets to the ISP router: process number = 10, area number=0 ) 5. Configure the static route on R1,R2 and R3 for the Internet connection