//ping form PC-A to PC-B
C:\>ping 195.29.2.3

Pinging 195.29.2.3 with 32 bytes of data:

Request timed out.
Reply from 195.29.2.3: bytes=32 time=2ms TTL=126
Reply from 195.29.2.3: bytes=32 time=5ms TTL=126
Reply from 195.29.2.3: bytes=32 time=1ms TTL=126

Ping statistics for 195.29.2.3:
    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
    Minimum = 1ms, Maximum = 5ms, Average = 2ms

C:\>

-----------------------------------------------------------------------------------
//ping from PC-A to PC-C
C:\>ping 195.29.3.3

Pinging 195.29.3.3 with 32 bytes of data:

Request timed out.
Reply from 195.29.3.3: bytes=32 time=2ms TTL=126
Reply from 195.29.3.3: bytes=32 time=1ms TTL=126
Reply from 195.29.3.3: bytes=32 time=3ms TTL=126

Ping statistics for 195.29.3.3:
    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
    Minimum = 1ms, Maximum = 3ms, Average = 2ms

-----------------------------------------------------------------------------------
//R1 configuration
R1# show r
Building configuration...

Current configuration : 1063 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524Z279-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 ip address 195.29.1.1 255.255.255.0
 ip ospf priority 200
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 bandwidth 128
 ip address 195.29.12.1 255.255.255.252
!
interface Serial0/0/1
 ip address 195.29.13.1 255.255.255.252
 clock rate 2000000
!
interface Vlan1
 no ip address
 shutdown
!
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
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end

-----------------------------------------------------------------------------------
//R2 configuration
R2#show r
Building configuration...

Current configuration : 1031 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524V8TR-
!
!
!
!
!
!
!
!
!
!
!
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 Serial0/0/0
 bandwidth 128
 ip address 195.29.12.2 255.255.255.252
 clock rate 2000000
!
interface Serial0/0/1
 ip address 195.29.23.1 255.255.255.252
 clock rate 2000000
!
interface Vlan1
 no ip address
 shutdown
!
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
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end

-----------------------------------------------------------------------------------
//R3 Configuration
R3#show r
Building configuration...

Current configuration : 953 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524P71W-
!
!
!
!
!
!
!
!
!
!
!
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 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 ospf 10
 router-id 3.3.3.3
 log-adjacency-changes
 auto-cost reference-bandwidth 1000
 network 195.29.3.0 0.0.0.255 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

-----------------------------------------------------------------------------------
//R1 IP route
R1#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

     195.29.1.0/24 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
O    195.29.2.0/24 [110/782] via 195.29.12.2, 00:28:06, Serial0/0/0
O    195.29.3.0/24 [110/782] via 195.29.13.2, 00:28:06, 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       195.29.12.1/32 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
     195.29.23.0/30 is subnetted, 1 subnets
O       195.29.23.0/30 [110/845] via 195.29.13.2, 00:28:06, Serial0/0/1
                       [110/845] via 195.29.12.2, 00:28:06, Serial0/0/0

-----------------------------------------------------------------------------------
//R2 IP Route
R2#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

O    195.29.1.0/24 [110/65] via 195.29.12.1, 00:29:36, Serial0/0/0
     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
O    195.29.3.0/24 [110/65] via 195.29.23.2, 00:29:36, 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
O       195.29.13.0/30 [110/845] via 195.29.12.1, 00:29:36, 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       195.29.23.1/32 is directly connected, Serial0/0/1

-----------------------------------------------------------------------------------
//R3 IP Route
R3#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

O    195.29.1.0/24 [110/65] via 195.29.13.1, 00:30:16, Serial0/0/0
O    195.29.2.0/24 [110/65] via 195.29.23.1, 00:30:16, 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
O       195.29.12.0/30 [110/128] via 195.29.23.1, 00:30:16, 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

-----------------------------------------------------------------------------------
//R1 IP OSPF Neighbor
R1#show ip ospf neighbor


Neighbor ID     Pri   State           Dead Time   Address         Interface
2.2.2.2           0   FULL/  -        00:00:39    195.29.12.2     Serial0/0/0
3.3.3.3           0   FULL/  -        00:00:36    195.29.13.2     Serial0/0/1

-----------------------------------------------------------------------------------
//R2 IP OSPF Neighbor
R2#show ip ospf neighbor


Neighbor ID     Pri   State           Dead Time   Address         Interface
1.1.1.1           0   FULL/  -        00:00:30    195.29.12.1     Serial0/0/0
3.3.3.3           0   FULL/  -        00:00:30    195.29.23.2     Serial0/0/1

-----------------------------------------------------------------------------------
//R3 IP OSPF Neighbor
R3#show ip ospf neighbor


Neighbor ID     Pri   State           Dead Time   Address         Interface
1.1.1.1           0   FULL/  -        00:00:37    195.29.13.1     Serial0/0/0
2.2.2.2           0   FULL/  -        00:00:37    195.29.23.1     Serial0/0/1

-----------------------------------------------------------------------------------
