Router 1:
Router#sh run
Building configuration...

Current configuration : 1245 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2911/K9 sn FTX152463JH-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 ip address 195.29.1.1 255.255.255.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/2
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 bandwidth 256
 ip address 195.29.12.1 255.255.255.252
 ip ospf priority 200
 clock rate 2000000
!
interface Serial0/0/1
 ip address 195.29.13.1 255.255.255.252
 clock rate 2000000
!
interface Vlan1
 no ip address
 shutdown
!
router eigrp 20
 network 195.29.0.0 0.0.255.255
 
!
router ospf 10
 router-id 1.1.1.1
 log-adjacency-changes
 passive-interface GigabitEthernet0/0
 auto-cost reference-bandwidth 1000
 network 195.29.1.0 0.0.0.255 area 0
 network 195.29.12.0 0.0.0.3 area 0
 network 195.29.13.0 0.0.0.3 area 0
 network 0.0.0.0 255.255.255.255 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
Router#  sh ip int brief
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     195.29.1.1      YES manual up                    up 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
GigabitEthernet0/2     unassigned      YES unset  administratively down down 
Serial0/0/0            195.29.12.1     YES manual up                    up 
Serial0/0/1            195.29.13.1     YES manual up                    up 
Vlan1                  unassigned      YES unset  administratively down down
Router#
Router#sh ip route
Codes: L - local, C - connected, S - static, 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

     195.29.1.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.1.0/24 is directly connected, GigabitEthernet0/0
L       195.29.1.1/32 is directly connected, GigabitEthernet0/0
     195.29.12.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.12.0/30 is directly connected, Serial0/0/0
L       195.29.12.1/32 is directly connected, Serial0/0/0
     195.29.13.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.13.0/30 is directly connected, Serial0/0/1
L       195.29.13.1/32 is directly connected, Serial0/0/1

Router 2

Router#sh run
Building configuration...

Current configuration : 1204 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2911/K9 sn FTX1524ZUOB-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 ip address 195.29.3.1 255.255.255.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/2
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 195.29.13.2 255.255.255.252
!
interface Serial0/0/1
 ip address 195.29.23.2 255.255.255.252
!
interface Vlan1
 no ip address
 shutdown
!
router eigrp 20
 network 195.29.0.0 0.0.255.255
 
!
router ospf 10
 router-id 2.2.2.2
 log-adjacency-changes
 passive-interface GigabitEthernet0/0
 auto-cost reference-bandwidth 1000
 network 195.29.2.0 0.0.0.255 area 0
 network 195.29.12.0 0.0.0.3 area 0
 network 195.29.23.0 0.0.0.3 area 0
 network 0.0.0.0 255.255.255.255 area 0
 network 192.29.12.0 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end


Router#show ip int brief 
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     195.29.3.1      YES manual up                    up 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
GigabitEthernet0/2     unassigned      YES unset  administratively down down 
Serial0/0/0            195.29.13.2     YES manual up                    up 
Serial0/0/1            195.29.23.2     YES manual up                    up 
Vlan1                  unassigned      YES unset  administratively down down
Router#sh ip route
Codes: L - local, C - connected, S - static, 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

D    195.29.2.0/24 [90/2172416] via 195.29.23.1, 00:09:52, Serial0/0/1
     195.29.3.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.3.0/24 is directly connected, GigabitEthernet0/0
L       195.29.3.1/32 is directly connected, GigabitEthernet0/0
     195.29.12.0/30 is subnetted, 1 subnets
D       195.29.12.0/30 [90/2681856] via 195.29.23.1, 00:09:52, Serial0/0/1
     195.29.13.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.13.0/30 is directly connected, Serial0/0/0
L       195.29.13.2/32 is directly connected, Serial0/0/0
     195.29.23.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.23.0/30 is directly connected, Serial0/0/1
L       195.29.23.2/32 is directly connected, Serial0/0/1

Router#sh ip ospf neighbor


Neighbor ID     Pri   State           Dead Time   Address         Interface
195.29.23.1       0   FULL/  -        00:00:34    195.29.23.1     Serial0/0/1
Router#sh ip eigrp neighbor
IP-EIGRP neighbors for process 20
H   Address         Interface      Hold Uptime    SRTT   RTO   Q   Seq
                                   (sec)          (ms)        Cnt  Num
0   195.29.23.1     Se0/0/1        14   00:10:20  40     1000  0   5

Router 3

Router#sh run
Building configuration...

Current configuration : 1151 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2911/K9 sn FTX15245328-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 ip address 195.29.2.1 255.255.255.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/2
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 195.29.12.2 255.255.255.252
!
interface Serial0/0/1
 ip address 195.29.23.1 255.255.255.252
 clock rate 2000000
!
interface Vlan1
 no ip address
 shutdown
!
router eigrp 20
 network 195.29.0.0 0.0.255.255
 
!
router ospf 10
 router-id 3.3.3.3
 log-adjacency-changes
 passive-interface GigabitEthernet0/0
 auto-cost reference-bandwidth 1000
 network 0.0.0.0 255.255.255.255 area 0
 network 195.29.13.0 0.0.0.3 area 0
 network 195.29.23.0 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end


Router#sh ip int brief
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     195.29.2.1      YES manual up                    up 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
GigabitEthernet0/2     unassigned      YES unset  administratively down down 
Serial0/0/0            195.29.12.2     YES manual up                    up 
Serial0/0/1            195.29.23.1     YES manual up                    up 
Vlan1                  unassigned      YES unset  administratively down down
Router#show ip route
Codes: L - local, C - connected, S - static, 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

     195.29.2.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.2.0/24 is directly connected, GigabitEthernet0/0
L       195.29.2.1/32 is directly connected, GigabitEthernet0/0
D    195.29.3.0/24 [90/2172416] via 195.29.23.2, 00:11:34, Serial0/0/1
     195.29.12.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.12.0/30 is directly connected, Serial0/0/0
L       195.29.12.2/32 is directly connected, Serial0/0/0
     195.29.13.0/30 is subnetted, 1 subnets
D       195.29.13.0/30 [90/2681856] via 195.29.23.2, 00:11:34, Serial0/0/1
     195.29.23.0/24 is variably subnetted, 2 subnets, 2 masks
C       195.29.23.0/30 is directly connected, Serial0/0/1
L       195.29.23.1/32 is directly connected, Serial0/0/1

Router#show ip ospf neighbor


Neighbor ID     Pri   State           Dead Time   Address         Interface
195.29.23.2       0   FULL/  -        00:00:36    195.29.23.2     Serial0/0/1
Router#show ip eigrp neighbor
IP-EIGRP neighbors for process 20
H   Address         Interface      Hold Uptime    SRTT   RTO   Q   Seq
                                   (sec)          (ms)        Cnt  Num
0   195.29.23.2     Se0/0/1        13   00:12:17  40     1000  0   5

Router#