Resolved! HSRP Configure
Base on diagram attached bellow: R1 Configure interface FastEthernet0/0 ip address 172.1.1.1 255.255.255.0 no shutdown duplex half standby version 2 standby 1 ip 172.1.1.254standby 1 track fa0/0 standby 1 track fa1/0 standby 1 preempt interface FastE...