R1ÅäÖÃ
r1-2514#show run     
Building configuration...

Current configuration : 917 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r1-2514
!
!
ip subnet-zero
!
!
!
!
interface Loopback0
 ip address 1.1.1.1 255.0.0.0
!
interface Ethernet0
 ip address 10.0.3.1 255.255.255.0
 ip nat inside
!
interface Ethernet1
 ip address 10.0.1.254 255.255.255.0
 ip nat outside
!         
interface Serial0
 ip address 172.31.1.1 255.255.255.0
 encapsulation frame-relay
 no arp frame-relay
 frame-relay map ip 172.31.1.2 102 broadcast
 frame-relay map ip 172.31.1.5 105 broadcast
 no frame-relay inverse-arp
!         
interface Serial1
 ip address 10.0.2.1 255.255.255.0
!         
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.0.255.255 area 0
!         
ip nat inside source list 100 interface Ethernet1 overload
ip classless
ip http server
!         
access-list 100 permit ip any any
!         
!         
line con 0
 logging synchronous
line aux 0
line vty 0 4
 login    
!         
end 

=========
r2ÅäÖÃ
r2-2514#show run
Building configuration...

Current configuration : 661 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r2-2514
!
!
ip subnet-zero
!
!
!
!
interface Loopback0
 ip address 2.2.2.2 255.0.0.0
!
interface Ethernet0
 ip address 192.168.0.1 255.255.255.0
 shutdown
!
interface Ethernet1
 no ip address
 shutdown 
!         
interface Serial0
 ip address 10.0.5.2 255.255.255.0
 clock rate 9600
!         
interface Serial1
 ip address 10.0.2.2 255.255.255.0
 clock rate 9600
!         
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.0.255.255 area 0
!         
ip classless
ip http server
!         
!         
!         
line con 0
 logging synchronous
line aux 0
line vty 0 4
 login    
!         
end

=========
r3ÅäÖÃ
r3-2514#show run
Building configuration...

Current configuration : 658 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r3-2514
!
!
ip subnet-zero
!
!
!
!
interface Loopback0
 ip address 3.3.3.3 255.0.0.0
!
interface Ethernet0
 ip address 10.0.3.3 255.255.255.0
!
interface Ethernet1
 ip address 10.0.4.3 255.255.255.0
!         
interface Serial0
 no ip address
 shutdown 
 no fair-queue
!
interface Serial1
 ip address 10.1.3.3 255.255.255.0
 shutdown
 clock rate 125000
!
router ospf 1
 log-adjacency-changes
 network 10.0.0.0 0.0.255.255 area 0
!
ip classless
ip http server
!
!
!
line con 0
 logging synchronous
line aux 0
line vty 0 4
 login
!
end   

========
R4ÅäÖÃ
r4-2501#show run
Building configuration...

Current configuration : 797 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service udp-small-servers
service tcp-small-servers
!
hostname r4-2501
!
!
ip subnet-zero
!
!
!
!
interface Loopback0
 ip address 4.4.4.4 255.0.0.0
!
interface Ethernet0
 ip address 10.0.4.4 255.255.255.0
!         
interface Serial0
 ip address 10.0.5.4 255.255.255.0
!         
interface Serial1
 ip address 172.16.1.4 255.255.255.0
!
router eigrp 100
 redistribute ospf 1 metric 1000 1 100 1 1500
 network 172.16.1.0 0.0.0.255
 no auto-summary
!
router ospf 1
 log-adjacency-changes
 redistribute eigrp 100 metric 100 subnets
 network 10.0.0.0 0.0.255.255 area 0
!
ip classless
no ip http server
!
!
!
line con 0
 logging synchronous
line aux 0
 transport input all
line vty 0 4
 login
!
end

=========
r5ÅäÖÃ
r5-2501#show run
Building configuration...

Current configuration : 756 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r5-2501
!
!
ip subnet-zero
!
!
!
!
interface Loopback0
 ip address 5.5.5.5 255.255.255.255
!
interface Ethernet0
 ip address 172.16.3.5 255.255.255.0
!
interface Serial0
 ip address 172.31.1.5 255.255.255.0
 encapsulation frame-relay
 no fair-queue
 no arp frame-relay
 frame-relay map ip 172.31.1.1 501 broadcast
 frame-relay map ip 172.31.1.2 502 broadcast
 no frame-relay inverse-arp
!
interface Serial1
 ip address 172.16.1.5 255.255.255.0
 clock rate 9600
!
router eigrp 100
 network 172.16.0.0
 no auto-summary
!
ip classless
ip http server
!
!
!
line con 0
 logging synchronous
line aux 0
line vty 0 4
 login
!
end