R1#sh run
Building configuration...
Current configuration : 1282 bytes
!
! Last configuration change at 17:50:46 UTC Tue Sep 5 2023
!
version 15.7
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
redundancy
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback10
  ip address 10.0.0.1 255.255.255.255
!
interface Ethernet0/0
  description LINK TO R3
  ip address 192.168.13.1 255.255.255.252
  duplex auto
!
interface Ethernet0/1
  description LINK TO SW1
  ip address 192.168.1.3 255.255.255.0
  duplex auto
!
interface Ethernet0/2
  no ip address
  shutdown
  duplex auto
!
interface Ethernet0/3
  no ip address
  shutdown
  duplex auto
!
router ospf 1
  router-id 10.0.0.1
  passive-interface Ethernet0/1
  network 10.0.0.1 0.0.0.0 area 0
  network 192.168.1.0 0.0.0.255 area 0
  network 192.168.13.0 0.0.0.3 area 0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
ipv6 ioam timestamp
!
!
!
control-plane
!
!
!
!
!
!
!
!
line con 0
  logging synchronous
line aux 0
line vty 0 4
  login
  transport input none
!
!
end
R1#
R1#sh run
Building configuration...
Current configuration : 1282 bytes
!
! Last configuration change at 17:50:46 UTC Tue Sep 5 2023
!
version 15.7
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
redundancy
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback10
  ip address 10.0.0.1 255.255.255.255
!
interface Ethernet0/0
  description LINK TO R3
  ip address 192.168.13.1 255.255.255.252
  duplex auto
!
interface Ethernet0/1
  description LINK TO SW1
  ip address 192.168.1.3 255.255.255.0
  duplex auto
!
interface Ethernet0/2
  no ip address
 shutdown
 duplex auto
!
interface Ethernet0/3
  no ip address
  shutdown
  duplex auto
!
router ospf 1
  router-id 10.0.0.1
  passive-interface Ethernet0/1
  network 10.0.0.1 0.0.0.0 area 0
  network 192.168.1.0 0.0.0.255 area 0
  network 192.168.13.0 0.0.0.3 area 0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
ipv6 ioam timestamp
!
!
!
control-plane
!
!
!
!
!
!
!
!
line con 0
  logging synchronous
line aux 0
line vty 0 4
  login
  transport input none
!
!
end
R1#
R2#sh run
Building configuration...
Current configuration : 1282 bytes
!
! Last configuration change at 17:58:29 UTC Tue Sep 5 2023
!
version 15.7
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
redundancy
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback10
  ip address 10.0.0.2 255.255.255.255
!
interface Ethernet0/0
  description LINK TO R3
  ip address 192.168.12.1 255.255.255.252
  duplex auto
!
interface Ethernet0/1
  description LINK TO SW1
  ip address 192.168.1.2 255.255.255.0
  duplex auto
!
interface Ethernet0/2
  no ip address
  shutdown
  duplex auto
!
interface Ethernet0/3
  no ip address
  shutdown
  duplex auto
!
router ospf 1
  router-id 10.0.0.2
  passive-interface Ethernet0/1
  network 10.0.0.2 0.0.0.0 area 0
  network 192.168.1.0 0.0.0.255 area 0
  network 192.168.12.0 0.0.0.3 area 0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
ipv6 ioam timestamp
!
!
!
control-plane
!
!
!
!
!
!
!
!
line con 0
  logging synchronous
line aux 0
line vty 0 4
  login
  transport input none
!
!
end
R2#
R3#sh run
Building configuration...
Current configuration : 1252 bytes
!
! Last configuration change at 17:50:54 UTC Tue Sep 5 2023
!
version 15.7
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
redundancy
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback10
  ip address 10.0.0.3 255.255.255.255
!
interface Ethernet0/0
  description LINK TO R1
  ip address 192.168.13.2 255.255.255.252
  duplex auto
!
interface Ethernet0/1
  description LINK TO R2
  ip address 192.168.12.2 255.255.255.252
  duplex auto
!
interface Ethernet0/2
  no ip address
  shutdown
  duplex auto
!
interface Ethernet0/3
  no ip address
  shutdown
  duplex auto
!
router ospf 1
  router-id 10.0.0.3
  network 10.0.0.3 0.0.0.0 area 0
  network 192.168.12.0 0.0.0.3 area 0
  network 192.168.13.0 0.0.0.3 area 0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
ipv6 ioam timestamp
!
!
!
control-plane
!
!
!
!
!
!
!
!
line con 0
  logging synchronous
line aux 0
line vty 0 4
  login
  transport input none
!
!
end
R3#