--------------------------------------- R1#show running-config hostname R1 ! interface Loopback0 ip address 1.1.1.1 255.255.255.255 ip router isis area12 ! interface FastEthernet0/0 ip address 192.168.12.1 255.255.255.0 ip router isis area12 speed auto duplex auto ! router isis area12 net 49.0012.0000.0000.0001.00 is-type level-2-only metric-style wide log-adjacency-changes ---------------------------------------- R2#show running-config ! hostname R2 ! interface Loopback0 ip address 2.2.2.2 255.255.255.255 ip router isis 24 ! interface FastEthernet0/0 ip address 192.168.12.2 255.255.255.0 ip router isis area12 speed auto duplex auto ! interface FastEthernet2/0 ip address 192.168.24.2 255.255.255.0 ip router isis 24 speed auto duplex auto isis network point-to-point ! router isis 24 net 49.0024.0000.0000.0006.00 is-type level-2-only metric-style wide log-adjacency-changes redistribute isis area12 ip metric 20 route-map 12-TAG-TO-24-TAG ! router isis area12 net 49.0012.0000.0000.0002.00 is-type level-2-only metric-style wide log-adjacency-changes redistribute isis 24 ip metric 20 route-map 24-TAG-TO-area12-TAG ! ! ip prefix-list LB-12 seq 10 permit 1.1.1.1/32 ! ip prefix-list LB-24 seq 10 permit 2.2.2.2/32 ip prefix-list LB-24 seq 20 permit 4.4.4.4/32 ! route-map 24-TAG-TO-area12-TAG permit 10 match ip address prefix-list LB-24 set tag 24 ! route-map 24-TAG-TO-area12-TAG permit 20 match tag 34 ! route-map 12-TAG-TO-24-TAG permit 10 match ip address prefix-list LB-12 set tag 12 ! --------------------------------------------- R4#show running-config ! hostname R4 ! interface Loopback0 ip address 4.4.4.4 255.255.255.255 ip router isis 24 ! interface Loopback1 ip address 44.44.44.44 255.255.255.255 ip router isis 24 ! interface FastEthernet0/0 ip address 192.168.34.4 255.255.255.0 ip router isis 34 speed auto duplex auto isis circuit-type level-2-only isis network point-to-point ! interface FastEthernet2/0 ip address 192.168.24.4 255.255.255.0 ip router isis 24 speed auto duplex auto isis circuit-type level-2-only isis network point-to-point ! router isis 24 net 49.0024.0000.0000.0008.00 is-type level-2-only metric-style wide log-adjacency-changes redistribute isis 34 ip metric 20 route-map 34-TAG-TO-24-TAG ! router isis 34 net 49.0034.0000.0000.0004.00 is-type level-2-only metric-style wide log-adjacency-changes redistribute isis 24 ip metric 20 route-map 24-TAG-TO-34-TAG ! ! ip prefix-list LB-24 seq 10 permit 2.2.2.2/32 ip prefix-list LB-24 seq 20 permit 4.4.4.4/32 ip prefix-list LB-24 seq 30 permit 44.44.44.44/32 ! ip prefix-list LB-34 seq 10 permit 3.3.3.3/32 ! route-map 24-TAG-TO-34-TAG permit 10 match ip address prefix-list LB-24 set tag 24 ! route-map 24-TAG-TO-34-TAG permit 20 match tag 12 ! route-map 34-TAG-TO-24-TAG permit 10 match ip address prefix-list LB-34 set tag 34 ! ----------------------------------------------- R3#show running-config ! hostname R3 ! ! interface Loopback0 ip address 3.3.3.3 255.255.255.255 ip router isis 34 ! interface FastEthernet0/0 ip address 192.168.34.3 255.255.255.0 ip router isis 34 speed auto duplex auto isis circuit-type level-2-only isis network point-to-point ! router isis 34 net 49.0034.0000.0000.0003.00 is-type level-2-only metric-style wide log-adjacency-changes ! ------------------------------------------------