
Router 1
CHACHA(config)#hostname Cha1
Cha1(config)#int fa1/0
Cha1(config-if)#ip add
Cha1(config-if)#ip address 172.18.0.1 255.255.0.0
Cha1(config-if)#no shut
Cha1(config-if)#exit
Cha1(config)#int fa0/0
Cha1(config-if)#ip add 172.19.0.1 255.255.0.0
Cha1(config-if)#no shut
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Cha1(config-if)#exit
Cha1(config)#int s2/0
Cha1(config-if)#ip add 172.17.0.1 255.255.0.0
Cha1(config-if)#cl
Cha1(config-if)#clock rate 9600
Cha1(config-if)#no shut
Cha1(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial2/0, changed state to down
Cha1(config-if)#
%SYS-5-CONFIG_I: Configured from console by console
Cha1#
Cha1(config)#router eigrp 1
Cha1(config-router)#no au
Cha1(config-router)#no auto-summary
Cha1(config-router)#net
Cha1(config-router)#network 172.19.0.0
Cha1(config-router)#network 172.18.0.0
Cha1(config-router)#network 172.17.0.0
Cha1(config-router)#network 172.16.0.0
Cha1(config-router)#network 172.20.0.0
Cha1(config-router)#network 10.1.0.0
Cha1(config-if)#ip sum
Cha1(config-if)#ip summary-address
Cha1(config-if)#ip summary-address eigrp 100 172.12.0.0 255.255.0.0
Cha1(config-if)#^Z
%SYS-5-CONFIG_I: Configured from console by console
Cha1(config)#int s2/0
Cha1(config-if)#ip su
Cha1(config-if)#ip summary-address ei
Cha1(config-if)#ip summary-address eigrp 1 172.16.0.0 255.248.0.0
Cha1(config-if)#
%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 172.17.0.2 (Serial2/0) is up: new adjacency
Cha1(config-if)#^Z
%SYS-5-CONFIG_I: Configured from console by console
Cha1#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.16.0.0/13 is a summary, 00:00:10, Null0
D 172.16.0.0/16 [90/20514560] via 172.17.0.2, 00:00:07, Serial2/0
C 172.17.0.0/16 is directly connected, Serial2/0
C 172.18.0.0/16 is directly connected, FastEthernet1/0
C 172.19.0.0/16 is directly connected, FastEthernet0/0
D 172.20.0.0/16 [90/21024000] via 172.17.0.2, 00:00:07, Serial2/0
Cha1#
Router 2
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#]h
Router(config)#h
Router(config)#hostname Cha2
Cha2(config)#int fa0/0
Cha2(config-if)#ip add 172.16.0.1 255.255.0.0
Cha2(config-if)#no shu
Cha2(config-if)#no shutdown
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Cha2(config-if)#exit
Cha2(config)#int s2/0
Cha2(config-if)#ip add 172.17.0.2 255.255.0.0
Cha2(config-if)#no sh
Cha2(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial2/0, changed state to up
Cha2(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
Cha2(config-if)#exit
Cha2(config)#int s3/0
Cha2(config-if)#ip add 172.15.0.1 255.255.0.0
Cha2(config-if)#clo
Cha2(config-if)#clock r
Cha2(config-if)#clock rate 9600
Cha2(config-if)#no sh
Cha2(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial3/0, changed state to down
Cha2(config-if)#
Cha2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Cha2(config)#int s3/0
Cha2(config-if)#ip add 172.20.0.1 255.255.0.0
Cha2(config-if)#cl
Cha2(config-if)#clock ra
Cha2(config-if)#clock rate 9600
Cha2(config-if)#no sh
Cha2(config-if)#no shutdown
Cha2(config-if)#
Cha2(config-if)#^Z
Cha2(config)#router eigrp 1
Cha2(config-router)#net
Cha2(config-router)#network 172.19.0.0
Cha2(config-router)#network 172.18.0.0
Cha2(config-router)#network 172.17.0.0
Cha2(config-router)#network 172.1.0.0
Cha2(config-router)#network 172.16.0.0
Cha2(config-router)#network 172.20.0.0
Cha2(config-router)#network 10.1.0.0
Cha2(config-router)#
Cha2(config)#int s2/0
Cha2(config-if)#
Cha2(config-if)#ip sum
Cha2(config-if)#ip summary-address ei
Cha2(config-if)#ip summary-address eigrp 1 172.16.0.0 255.248
^
% Invalid input detected at '^' marker.
Cha2(config-if)#ip summary-address eigrp 1 172.16.0.0 255.248.0.0
Cha2(config-if)#
Cha2(config)#int s3/0
Cha2(config-if)#ip summary-address eigrp 1 172.16.0.0 255.248.0.0
Cha2(config-if)#^Z
%SYS-5-CONFIG_I: Configured from console by console
Cha2#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.16.0.0/13 is a summary, 00:00:10, Null0
C 172.16.0.0/16 is directly connected, FastEthernet0/0
C 172.17.0.0/16 is directly connected, Serial2/0
C 172.20.0.0/16 is directly connected, Serial3/0
Cha2#
Router 3
Router>EN
Router#h
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#h
Router(config)#hostname Cha3
Cha3(config)#int fa0/0
Cha3(config-if)#ip add 10.1.0.1 255.255.0.0
Cha3(config-if)#no s
Cha3(config-if)#no sh
Cha3(config-if)#no shutdown
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Cha3(config-if)#exit
Cha3(config)#int s3/0
Cha3(config-if)#ip add 172.15.0.2 255.255.0.0
Cha3(config-if)#no shut
Cha3(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial3/0, changed state to up
Cha3(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial3/0, changed state to up
%SYS-5-CONFIG_I: Configured from console by console
Cha3#
Cha3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Cha3(config-if)#ip add 172.20.0.2 255.255.0.0
Cha3(config-if)#
%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 172.20.0.1 (Serial3/0) is up: new adjacency
Cha3(config-if)#no sh
Cha3(config-if)#no shutdown
Cha3(config-if)#^Z
%LINK-5-CHANGED: Interface Serial3/0, changed state to up
Cha3(config-if)#e
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial3/0, changed state to upxit
Cha3(config)#int fa0/0
Cha3(config-if)#ip add 10.1.0.1 255.255.0.0
Cha3(config-if)#no sh
Cha3(config-if)#no shutdown
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Cha3(config-if)#
Cha3(config)#router eigrp 1
Cha3(config-router)#no a
Cha3(config-router)#no auto-summary
Cha3(config-router)#net
Cha3(config-router)#network 172.19.0.0
Cha3(config-router)#network 172.18.0.0
Cha3(config-router)#network 172.17.0.0
Cha3(config-router)#network 172.16.0.0
Cha3(config-router)#network 172.20.0.0
Cha3(config-router)#network 10.1.0.0
Cha3(config-router)#
Cha3(config)#int s3/0
Cha3(config-if)#ip sum
Cha3(config-if)#ip summary-address ei
Cha3(config-if)#ip summary-address eigrp 1 172.16.0.0 255.248.0.0
Cha3(config-if)#^Z
Cha3#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/16 is subnetted, 1 subnets
C 10.1.0.0 is directly connected, FastEthernet0/0
D 172.16.0.0/13 is a summary, 00:00:24, Null0
C 172.20.0.0/16 is directly connected, Serial3/0
Cha3#
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