OSPF route summarization
we still use same network setup from the previous lab but with a little modification *there's a bit error on the image, L81-84 actually on R5 add 4 new loopbacks on R5, advertise inside area 40 interface Loopback81 ip address 81.1.1.1 255.0.0.0 ! interface Loopback82 ip address 82.1.1.1 255.0.0.0 ! interface Loopback83 ip address 83.1.1.1 255.0.0.0 ! interface Loopback84 ip address 84.1.1.1 255.0.0.0 ! interface Loopback85 ip address 85.1.1.1 255.255.255.0 router ospf 1 log-adjacency-changes .. network 82.0.0.0 0.255.255.255 area 40 network 83.0.0.0 0.255.255.255 area 40 network 84.0.0.0 0.255.255.255 area 40 network 85.1.1.0 0.0.0.255 area 40 on R4, advertise into RIP interface Loopback99 ip address 99.1.1.1 255.0.0.0 ! interface Loopback100 ip address 100.1.1.1 255.0.0.0 ! interface Loopback101 ip address 101.1.1.1 255.0.0.0 ! interface Loopback102 ip address 102.1.1.1 255.0.0.0 ...