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jawaban PKA 9.3.1.4

R1
R1>ena
R1#conf t
R1(config)#router ospf 1
R1(config-router)#router
R1(config-router)#router-id 1.1.1.1
R1(config-router)#network 172.31.24.0 0.0.3.255 area 10
R1(config-router)#network 172.31.31.248 0.0.0.3 area 0
R1(config-router)#network 172.31.31.252 0.0.0.3 area 0
R1(config-router)#passive-interface g0/0
R1(config-router)#passive-interface g0/1
R1(config-router)#exit

R1(config)#ip route 0.0.0.0 0.0.0.0 s0/1/0
R1(config)#router ospf 1
R1(config-router)#default-information originate
R1(config-router)#area 0 authentication message-digest
R1(config-router)#exit
R1(config)#int se0/0/0
R1(config-if)#ip ospf message-digest-key 1 md5 cisco123
R1(config-if)#exit
R1(config)#int se0/0/1
R1(config-if)#ip ospf message-digest-key 1 md5 cisco123
R1(config-if)#
R1>ena
R1#conf t
R1(config)#access-list 1 permit 172.31.24.1 0.0.0.0
R1(config)#line vty 0 15
R1(config-line)#access-class 1 in
R1(config-line)#

R2
R2>ena
R2#conf t
R2(config)#router ospf 1
R2(config-router)#router-id 2.2.2.2
R2(config-router)#network 172.31.28.0 0.0.1.255 area 20
R2(config-router)#network 172.31.31.248 0.0.0.3 area 0
R2(config-router)#passive-interface g0/0
R2(config-router)#passive-interface g0/1
R2(config-router)#area 0 authentication message-digest
R2(config-router)#exit

R2(config)#int se0/0/0
R2(config-if)#ip ospf message-digest-key 1 md5 cisco123
R2(config-if)#
00:27:37: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Serial0/0/0 from LOADING to FULL, Loading Done


R3

R3>ena
R3#conf t
R3(config)#int g0/0
R3(config-if)#ip address 172.31.30.126 255.255.255.128
R3(config-if)#no shutdown
R3(config-if)#exit
R3(config)#int g0/1
R3(config-if)#ip address 172.31.30.254 255.255.255.128
R3(config-if)#no shutdown
R3(config-if)#

R3>ena
R3#conf t
R3(config)#router ospf 1
R3(config-router)#router-id 3.3.3.3
R3(config-router)#network 172.31.30.0 0.0.0.255 area 30
R3(config-router)#network 172.31.31.252 0.0.0.3 area 0
R3(config-router)#passive-interface g0/0
R3(config-router)#passive-interface g0/1
R3(config-router)#exit
R3(config)#router ospf 1
R3(config-router)#area 0 authentication message-digest
R3(config-router)#exit
R3(config)#int se0/0/1
R3(config-if)#ip ospf message-digest-key 1 md5 cisco123
R3(config-if)#
00:31:01: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Serial0/0/1 from LOADING to FULL, Loading Done

R3(config-if)#do show ip route ospf

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