This is the answer for Scenario 5: IS-IS routing on Frame Relay Multi-point and Point-to-Point.
Router 1 Configuration.
R1#sh run Building configuration... Current configuration : 870 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R1 ! ! ip subnet-zero ! ! ! ! interface Ethernet0 no ip address shutdown ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 multipoint ip address 20.20.20.1 255.255.255.248 ip router isis frame-relay map clns 222 broadcast frame-relay map clns 333 broadcast frame-relay map ip 20.20.20.2 222 broadcast frame-relay map ip 20.20.20.3 333 broadcast isis circuit-type level-2-only ! interface Serial0.2 point-to-point ip address 30.30.30.1 255.255.255.252 ip router isis frame-relay interface-dlci 444 isis circuit-type level-1 ! interface Serial1 no ip address shutdown ! router isis net 49.0001.0000.0000.000a.00 ! ip classless ip http server ! ! ! line con 0 line aux 0 line vty 0 4 login ! end
Router 1 sh ip route.
Gateway of last resort is not set
50.0.0.0/24 is subnetted, 1 subnets
i L1 50.50.50.0 [115/20] via 30.30.30.2, Serial0.2
70.0.0.0/24 is subnetted, 1 subnets
i L1 70.70.70.0 [115/20] via 30.30.30.2, Serial0.2
20.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
i L2 20.20.20.16/30 [115/20] via 20.20.20.2, Serial0.1
i L2 20.20.20.24/30 [115/20] via 20.20.20.2, Serial0.1
C 20.20.20.0/29 is directly connected, Serial0.1
i L2 20.20.20.8/30 [115/20] via 20.20.20.2, Serial0.1
10.0.0.0/30 is subnetted, 4 subnets
i L2 10.10.10.8 [115/30] via 20.20.20.3, Serial0.1
i L2 10.10.10.12 [115/30] via 20.20.20.3, Serial0.1
i L2 10.10.10.0 [115/20] via 20.20.20.3, Serial0.1
i L2 10.10.10.4 [115/30] via 20.20.20.3, Serial0.1
60.0.0.0/24 is subnetted, 1 subnets
i L1 60.60.60.0 [115/20] via 30.30.30.2, Serial0.2
30.0.0.0/30 is subnetted, 1 subnets
C 30.30.30.0 is directly connected, Serial0.2
Router 2 Configuration.
R2#sh run Building configuration... Current configuration : 983 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R2 ! ! ip subnet-zero ! ! ! ! interface Loopback0 ip address 20.20.20.9 255.255.255.252 ip router isis ! interface Loopback1 ip address 20.20.20.17 255.255.255.252 ip router isis ! interface Loopback2 ip address 20.20.20.25 255.255.255.252 ip router isis ! interface Ethernet0 no ip address shutdown ! interface Serial0 ip address 20.20.20.2 255.255.255.248 ip router isis encapsulation frame-relay frame-relay map clns 111 broadcast frame-relay map clns 333 broadcast frame-relay map ip 20.20.20.1 111 broadcast frame-relay map ip 20.20.20.3 333 broadcast frame-relay lmi-type cisco ! interface Serial1 no ip address shutdown ! interface BRI0 no ip address encapsulation hdlc shutdown ! router isis net 49.0002.0000.0000.000b.00 is-type level-2-only ! ip classless ip http server ! ! ! line con 0 line aux 0 line vty 0 4 login ! end
Router 2 sh ip route.
Gateway of last resort is not set
50.0.0.0/24 is subnetted, 1 subnets
i L2 50.50.50.0 [115/30] via 20.20.20.1, Serial0
70.0.0.0/24 is subnetted, 1 subnets
i L2 70.70.70.0 [115/30] via 20.20.20.1, Serial0
20.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 20.20.20.16/30 is directly connected, Loopback1
C 20.20.20.24/30 is directly connected, Loopback2
C 20.20.20.0/29 is directly connected, Serial0
C 20.20.20.8/30 is directly connected, Loopback0
10.0.0.0/30 is subnetted, 4 subnets
i L2 10.10.10.8 [115/30] via 20.20.20.3, Serial0
i L2 10.10.10.12 [115/30] via 20.20.20.3, Serial0
i L2 10.10.10.0 [115/20] via 20.20.20.3, Serial0
i L2 10.10.10.4 [115/30] via 20.20.20.3, Serial0
60.0.0.0/24 is subnetted, 1 subnets
i L2 60.60.60.0 [115/30] via 20.20.20.1, Serial0
30.0.0.0/30 is subnetted, 1 subnets
i L2 30.30.30.0 [115/20] via 20.20.20.1, Serial0
Router 3 Configuration.
R3#sh run Building configuration... Current configuration : 787 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R3 ! ! ip subnet-zero ! ! ! ! interface Ethernet0 no ip address shutdown ! interface Serial0 ip address 20.20.20.3 255.255.255.248 ip router isis encapsulation frame-relay frame-relay map clns 111 broadcast frame-relay map clns 222 broadcast frame-relay map ip 20.20.20.1 111 broadcast frame-relay map ip 20.20.20.2 222 broadcast isis circuit-type level-2-only ! interface Serial1 ip address 10.10.10.2 255.255.255.252 ip router isis isis circuit-type level-1 ! interface BRI0 no ip address encapsulation hdlc shutdown ! router isis net 49.0003.0000.0000.000c.00 ! ip classless ip http server ! ! ! line con 0 line aux 0 line vty 0 4 login ! end
Router 3 sh ip route.
Gateway of last resort is not set
50.0.0.0/24 is subnetted, 1 subnets
i L2 50.50.50.0 [115/30] via 20.20.20.1, Serial0
70.0.0.0/24 is subnetted, 1 subnets
i L2 70.70.70.0 [115/30] via 20.20.20.1, Serial0
20.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
i L2 20.20.20.16/30 [115/20] via 20.20.20.2, Serial0
i L2 20.20.20.24/30 [115/20] via 20.20.20.2, Serial0
C 20.20.20.0/29 is directly connected, Serial0
i L2 20.20.20.8/30 [115/20] via 20.20.20.2, Serial0
10.0.0.0/30 is subnetted, 4 subnets
i L1 10.10.10.8 [115/20] via 10.10.10.1, Serial1
i L1 10.10.10.12 [115/20] via 10.10.10.1, Serial1
C 10.10.10.0 is directly connected, Serial1
i L1 10.10.10.4 [115/20] via 10.10.10.1, Serial1
60.0.0.0/24 is subnetted, 1 subnets
i L2 60.60.60.0 [115/30] via 20.20.20.1, Serial0
30.0.0.0/30 is subnetted, 1 subnets
i L2 30.30.30.0 [115/20] via 20.20.20.1, Serial0
Router 4 Configuration.
R4#sh run Building configuration... Current configuration : 850 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R4 ! ! ip subnet-zero ! ! ! ! interface Loopback0 ip address 50.50.50.1 255.255.255.0 ip router isis ! interface Loopback1 ip address 60.60.60.1 255.255.255.0 ip router isis ! interface Loopback2 ip address 70.70.70.1 255.255.255.0 ip router isis ! interface Ethernet0 no ip address shutdown ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 point-to-point ip address 30.30.30.2 255.255.255.252 ip router isis frame-relay interface-dlci 111 ! interface Serial1 no ip address shutdown ! interface BRI0 no ip address encapsulation hdlc shutdown ! router isis net 49.0001.0000.0000.000b.00 ! ip classless ip http server ! ! ! line con 0 line aux 0 line vty 0 4 login ! end
Router 4 sh ip route.
Gateway of last resort is 30.30.30.1 to network 0.0.0.0
50.0.0.0/24 is subnetted, 1 subnets
C 50.50.50.0 is directly connected, Loopback0
70.0.0.0/24 is subnetted, 1 subnets
C 70.70.70.0 is directly connected, Loopback2
60.0.0.0/24 is subnetted, 1 subnets
C 60.60.60.0 is directly connected, Loopback1
30.0.0.0/30 is subnetted, 1 subnets
C 30.30.30.0 is directly connected, Serial0.1
i*L1 0.0.0.0/0 [115/10] via 30.30.30.1, Serial0.1
Router 5 Configuration.
R5#sh run Building configuration... Current configuration : 695 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R5 ! ! ip subnet-zero ! ! ! ! interface Loopback0 ip address 10.10.10.5 255.255.255.252 ip router isis ! interface Loopback1 ip address 10.10.10.9 255.255.255.252 ip router isis ! interface Loopback2 ip address 10.10.10.13 255.255.255.252 ip router isis ! interface Ethernet0 no ip address shutdown ! interface Serial0 ip address 10.10.10.1 255.255.255.252 ip router isis no fair-queue clockrate 56000 ! router isis net 49.0003.0000.0000.000a.00 is-type level-1 ! ip classless ip http server ! ! ! line con 0 line 1 16 line aux 0 line vty 0 4 login ! end
Router 5 sh ip route.
Gateway of last resort is 10.10.10.2 to network 0.0.0.0
10.0.0.0/30 is subnetted, 4 subnets
C 10.10.10.8 is directly connected, Loopback1
C 10.10.10.12 is directly connected, Loopback2
C 10.10.10.0 is directly connected, Serial0
C 10.10.10.4 is directly connected, Loopback0
i*L1 0.0.0.0/0 [115/10] via 10.10.10.2, Serial0
David Sudjiman 