OSPF Vitual link - GNS3
for R1, R2 and R3, we'll use the same setup as previous lab . there's new setting on R3 and new router, R4 check here R3 interface FastEthernet0/1 ip address 172.16.1.3 255.255.255.0 duplex auto speed auto ! router ospf 1 log-adjacency-changes network 3.3.3.3 0.0.0.0 area 0 network 172.16.1.0 0.0.0.255 area 17 network 192.168.3.0 0.0.0.255 area 0 R4 interface Loopback0 ip address 4.4.4.4 255.255.255.255 ! interface Loopback1 ip address 10.1.1.1 255.255.255.0 ! interface Loopback2 ip address 10.2.2.2 255.255.255.0 ! interface FastEthernet0/1 ip address 172.16.1.4 255.255.255.0 duplex auto speed auto ! router ospf 1 router-id 4.4.4.4 log-adjacency-changes network 4.4.4.4 0.0.0.0 area 17 network 10.1.1.0 0.0.0.255 area 10 network 10.2.2.0 0.0.0.255 area 10 network 172.16.1.0 0.0.0.255 area 17 *correction on IP address between R3 and R4, don't use the diagram IP but follow...