ROUTER 1 CONFIGURATION
==================================
R1#sh run
Building configuration...

Current configuration : 1606 bytes
!
version 12.4
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
memory-size iomem 5
no ip icmp rate-limit unreachable
!
!
ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
interface Ethernet0/0
 ip address dhcp
 ip nat outside
 ip virtual-reassembly
 half-duplex
!
interface FastEthernet1/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial2/0
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial2/1
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial2/2
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial2/3
 no ip address
 shutdown
 serial restart-delay 0
!
interface Ethernet3/0
 ip address 192.168.1.1 255.255.255.248
 ip nat inside
 ip virtual-reassembly
 half-duplex
!
interface Ethernet3/1
 ip address 192.168.3.1 255.255.255.248
 half-duplex
!
interface Ethernet3/2
 no ip address
 shutdown
 half-duplex
!
interface Ethernet3/3
 no ip address
 shutdown
 half-duplex
!
router ospf 1
 log-adjacency-changes
 network 0.0.0.0 255.255.255.255 area 1
 default-information originate always
!
no ip http server
no ip http secure-server
!
!
ip nat inside source list 1 interface Ethernet0/0 overload
!
access-list 1 permit any
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end
====================================================================================
ROUTER 2 CONFIGURATION

R2(config)#DO SH RUN
Building configuration...

Current configuration : 1647 bytes
!
version 12.4
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
memory-size iomem 5
no ip icmp rate-limit unreachable
!
!
ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
interface Ethernet0/0
 ip address dhcp
 ip nat outside
 ip virtual-reassembly
 half-duplex
!
interface FastEthernet1/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial2/0
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial2/1
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial2/2
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial2/3
 no ip address
 shutdown
 serial restart-delay 0
!
interface Ethernet3/0
 ip address 192.168.2.1 255.255.255.248
 ip nat inside
 ip virtual-reassembly
 half-duplex
!
interface Ethernet3/1
 ip address 192.168.5.1 255.255.255.248
 half-duplex
!
interface Ethernet3/2
 no ip address
 shutdown
 half-duplex
!
interface Ethernet3/3
 no ip address
 shutdown
 half-duplex
!
router ospf 1
 log-adjacency-changes
 network 0.0.0.0 255.255.255.255 area 1
 default-information originate always
!
no ip http server
no ip http secure-server
!
!
ip nat inside source list 1 interface Ethernet0/0 overload
!
access-list 1 permit any
access-list 1 permit 192.168.2.0 0.0.0.7
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
===============================================================================================
CORE SWITCH 1 CONFIGURATION

C1#SH RUN
Building configuration...

Current configuration : 1859 bytes
!
! Last configuration change at 19:25:08 UTC Sat Oct 1 2022
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname C1
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ip icmp rate-limit unreachable
!
ip cef
no ip domain-lookup
!
no ipv6 cef
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
ip tcp synwait-time 5
!
!
!
!
!
!
interface Ethernet0/0
 ip address 192.168.1.2 255.255.255.248
 shutdown
 duplex auto
!
interface Ethernet0/1
 ip address 192.168.5.2 255.255.255.248
 duplex auto
!
interface Ethernet0/2
 no ip address
 duplex auto
!
interface Ethernet0/3
 no ip address
 duplex auto
!
interface Ethernet1/0
 no ip address
 duplex auto
!
interface Ethernet1/1
 no ip address
 duplex auto
!
interface Ethernet1/2
 no ip address
 duplex auto
!
interface Ethernet1/3
 no ip address
 duplex auto
!
interface Ethernet2/0
 no ip address
 duplex auto
!
interface Ethernet2/1
 no ip address
 duplex auto
!
interface Ethernet2/2
 no ip address
 duplex auto
!
interface Ethernet2/3
 no ip address
 duplex auto
!
interface Ethernet3/0
 no ip address
 duplex auto
!
interface Ethernet3/1
 no ip address
 duplex auto
!
interface Ethernet3/2
 no ip address
 duplex auto
!
interface Ethernet3/3
 no ip address
 duplex auto
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 redistribute connected
 network 0.0.0.0 255.255.255.255 area 1
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
 transport input all
!
end

=====================================================================================
CORE SWITCH 2 CONFIGURATION

C2#SH RUN
Building configuration...

Current configuration : 1859 bytes
!
! Last configuration change at 19:25:18 UTC Sat Oct 1 2022
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname C2
!
boot-start-marker
boot-end-marker
!
!
logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL
logging buffered 50000
logging console discriminator EXCESS
!
no aaa new-model
no ip icmp rate-limit unreachable
!
ip cef
no ip domain-lookup
!
no ipv6 cef
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
ip tcp synwait-time 5
!
!
!
!
!
!
interface Ethernet0/0
 ip address 192.168.2.2 255.255.255.248
 shutdown
 duplex auto
!
interface Ethernet0/1
 no ip address
 duplex auto
!
interface Ethernet0/2
 no ip address
 duplex auto
!
interface Ethernet0/3
 no ip address
 duplex auto
!
interface Ethernet1/0
 no ip address
 duplex auto
!
interface Ethernet1/1
 no ip address
 duplex auto
!
interface Ethernet1/2
 no ip address
 duplex auto
!
interface Ethernet1/3
 no ip address
 duplex auto
!
interface Ethernet2/0
 no ip address
 duplex auto
!
interface Ethernet2/1
 no ip address
 duplex auto
!
interface Ethernet2/2
 no ip address
 duplex auto
!
interface Ethernet2/3
 no ip address
 duplex auto
!
interface Ethernet3/0
 no ip address
 duplex auto
!
interface Ethernet3/1
 ip address 192.168.3.2 255.255.255.248
 duplex auto
!
interface Ethernet3/2
 no ip address
 duplex auto
!
interface Ethernet3/3
 no ip address
 duplex auto
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 redistribute connected
 network 0.0.0.0 255.255.255.255 area 1
!
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
 transport input all
!
end