OSPF - Routes Filtering
please refer to previous post for details and configuration. before we get started, please take notes that we can only filter routes from being installed into the router's routing table, that means we can only filter inbound routes. We'll filter Could 5 (10.10.5.0/24) on R4, so that Cloud 1 & 2 (192.168.1.0 and 192.168.2.0) could not reach Cloud 5. Before changes, Cloud 1/2 can reach Cloud 5 VPCS[1]> ping 10.10.5.1 10.10.5.1 icmp_seq=1 ttl=61 time=32.803 ms 10.10.5.1 icmp_seq=2 ttl=61 time=39.639 ms 10.10.5.1 icmp_seq=3 ttl=61 time=37.984 ms 10.10.5.1 icmp_seq=4 ttl=61 time=37.612 ms 10.10.5.1 icmp_seq=5 ttl=61 time=34.332 ms Create access list for the interested route, and apply it on OSPF process 1 access-list 1 deny 10.10.5.0 0.0.0.255 access-list 1 permit any router ospf 1 .. distribute-list 1 in FastEthernet0/0 Now Cloud 5 should not be available to Cloud 1 and 2 VPCS[1]> ping 10.10.5.1 *192.168.1.254 icmp_seq=1 ttl=255 ti...
