Result of ping from PC-A to PC-B

C:\>ping 200.100.2.3

Pinging 200.100.2.3 with 32 bytes of data:

Reply from 200.100.2.3: bytes=32 time=1ms TTL=126
Reply from 200.100.2.3: bytes=32 time=1ms TTL=126
Reply from 200.100.2.3: bytes=32 time=1ms TTL=126
Reply from 200.100.2.3: bytes=32 time=1ms TTL=126

Ping statistics for 200.100.2.3:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 1ms, Maximum = 1ms, Average = 1ms



R1 informations:

Current configuration : 1386 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524X5NC-
!
!
!
!
!
!
!
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 description PC-A
 ip address 200.100.1.1 255.255.255.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/3/0
 description connection to R2
 bandwidth 128
 ip address 200.100.12.1 255.255.255.252
 ip ospf cost 200
 clock rate 800000
!
interface Serial0/3/1
 description connection to R3
 ip address 200.100.13.1 255.255.255.252
!
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 200.100.12.0 0.0.0.3 area 0
 network 200.100.13.0 0.0.0.3 area 0
 network 200.100.1.0 0.0.0.255 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
banner motd ^CAttention! Unauthorised access to this device is prohibited!^C
!
!
!
!
!
line con 0
 exec-timeout 5 0
 password class
 logging synchronous
 login
!
line aux 0
!
line vty 0 4
 password class
 login
line vty 5 15
 password class
 login
!
!
!
end


R1#show ip interface brief 
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     200.100.1.1     YES manual up                    up 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
Serial0/3/0            200.100.12.1    YES manual up                    up 
Serial0/3/1            200.100.13.1    YES manual up                    up 
Vlan1                  unassigned      YES unset  administratively down down


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

     200.100.1.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.1.0/24 is directly connected, GigabitEthernet0/0
L       200.100.1.1/32 is directly connected, GigabitEthernet0/0
O    200.100.2.0/24 [110/210] via 200.100.12.2, 00:15:50, Serial0/3/0
O    200.100.3.0/24 [110/657] via 200.100.13.2, 00:20:32, Serial0/3/1
     200.100.12.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.12.0/30 is directly connected, Serial0/3/0
L       200.100.12.1/32 is directly connected, Serial0/3/0
     200.100.13.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.13.0/30 is directly connected, Serial0/3/1
L       200.100.13.1/32 is directly connected, Serial0/3/1
     200.100.23.0/30 is subnetted, 1 subnets
O       200.100.23.0/30 [110/847] via 200.100.12.2, 00:15:50, Serial0/3/0


R1#show ip ospf neighbor 

Neighbor ID     Pri   State           Dead Time   Address         Interface
2.2.2.2           0   FULL/  -        00:00:39    200.100.12.2    Serial0/3/0
3.3.3.3           0   FULL/  -        00:00:30    200.100.13.2    Serial0/3/1


R1#show ip ospf database 
            OSPF Router with ID (1.1.1.1) (Process ID 10)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
2.2.2.2         2.2.2.2         1330        0x80000008 0x008a10 5
3.3.3.3         3.3.3.3         1301        0x80000008 0x003d55 5
1.1.1.1         1.1.1.1         1010        0x80000009 0x0058dc 5



R2 informations:

Current configuration : 1381 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
!
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524U653-
!
!
!
!
!
!
!
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 description PC-B
 ip address 200.100.2.1 255.255.255.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/3/0
 description connection to R1
 bandwidth 128
 ip address 200.100.12.2 255.255.255.252
!
interface Serial0/3/1
 description connection to R3
 ip address 200.100.23.1 255.255.255.252
 clock rate 800000
!
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 200.100.12.0 0.0.0.3 area 0
 network 200.100.23.0 0.0.0.3 area 0
 network 200.100.2.0 0.0.0.255 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
no cdp run
!
banner motd ^CAttention! Unauthorised access to this device is prohibited!^C
!
!
!
!
!
line con 0
 exec-timeout 5 0
 password class
 logging synchronous
 login
!
line aux 0
!
line vty 0 4
 password class
 login
line vty 5 15
 password class
 login
!
!
!
end


R2#show ip interface brief 
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     200.100.2.1     YES manual up                    up 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
Serial0/3/0            200.100.12.2    YES manual up                    up 
Serial0/3/1            200.100.23.1    YES manual up                    up 
Vlan1                  unassigned      YES unset  administratively down down


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    200.100.1.0/24 [110/657] via 200.100.12.1, 00:24:10, Serial0/3/0
     200.100.2.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.2.0/24 is directly connected, GigabitEthernet0/0
L       200.100.2.1/32 is directly connected, GigabitEthernet0/0
O    200.100.3.0/24 [110/657] via 200.100.23.2, 00:23:31, Serial0/3/1
     200.100.12.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.12.0/30 is directly connected, Serial0/3/0
L       200.100.12.2/32 is directly connected, Serial0/3/0
     200.100.13.0/30 is subnetted, 1 subnets
O       200.100.13.0/30 [110/1294] via 200.100.12.1, 00:23:42, Serial0/3/0
                        [110/1294] via 200.100.23.2, 00:23:42, Serial0/3/1
     200.100.23.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.23.0/30 is directly connected, Serial0/3/1
L       200.100.23.1/32 is directly connected, Serial0/3/1


R2#show ip ospf neighbor 

Neighbor ID     Pri   State           Dead Time   Address         Interface
3.3.3.3           0   FULL/  -        00:00:35    200.100.23.2    Serial0/3/1
1.1.1.1           0   FULL/  -        00:00:35    200.100.12.1    Serial0/3/0


R2#show ip ospf database 
            OSPF Router with ID (2.2.2.2) (Process ID 10)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
2.2.2.2         2.2.2.2         1492        0x80000008 0x008a10 5
3.3.3.3         3.3.3.3         1463        0x80000008 0x003d55 5
1.1.1.1         1.1.1.1         1172        0x80000009 0x0058dc 5



R3 informations:

Current configuration : 1366 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
!
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524K26K-
!
!
!
!
!
!
!
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 description PC-C
 ip address 200.100.3.1 255.255.255.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/3/0
 description connection to R1
 ip address 200.100.13.2 255.255.255.252
 clock rate 800000
!
interface Serial0/3/1
 description connection to R2
 ip address 200.100.23.2 255.255.255.252
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 10
 router-id 3.3.3.3
 log-adjacency-changes
 passive-interface GigabitEthernet0/0
 auto-cost reference-bandwidth 1000
 network 200.100.13.0 0.0.0.3 area 0
 network 200.100.23.0 0.0.0.3 area 0
 network 200.100.3.0 0.0.0.255 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
no cdp run
!
banner motd ^CAttention! Unauthorised access to this device is prohibited!^C
!
!
!
!
!
line con 0
 exec-timeout 5 0
 password class
 logging synchronous
 login
!
line aux 0
!
line vty 0 4
 password class
 login
line vty 5 15
 password class
 login
!
!
!
end


R3#show ip interface brief 
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     200.100.3.1     YES manual up                    up 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
Serial0/3/0            200.100.13.2    YES manual up                    up 
Serial0/3/1            200.100.23.2    YES manual up                    up 
Vlan1                  unassigned      YES unset  administratively down down


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    200.100.1.0/24 [110/657] via 200.100.13.1, 00:25:55, Serial0/3/0
O    200.100.2.0/24 [110/657] via 200.100.23.1, 00:25:55, Serial0/3/1
     200.100.3.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.3.0/24 is directly connected, GigabitEthernet0/0
L       200.100.3.1/32 is directly connected, GigabitEthernet0/0
     200.100.12.0/30 is subnetted, 1 subnets
O       200.100.12.0/30 [110/847] via 200.100.13.1, 00:21:02, Serial0/3/0
     200.100.13.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.13.0/30 is directly connected, Serial0/3/0
L       200.100.13.2/32 is directly connected, Serial0/3/0
     200.100.23.0/24 is variably subnetted, 2 subnets, 2 masks
C       200.100.23.0/30 is directly connected, Serial0/3/1
L       200.100.23.2/32 is directly connected, Serial0/3/1


R3#show ip ospf neighbor 


Neighbor ID     Pri   State           Dead Time   Address         Interface
2.2.2.2           0   FULL/  -        00:00:32    200.100.23.1    Serial0/3/1
1.1.1.1           0   FULL/  -        00:00:32    200.100.13.1    Serial0/3/0


R3#show ip ospf database 
            OSPF Router with ID (3.3.3.3) (Process ID 10)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
2.2.2.2         2.2.2.2         1620        0x80000008 0x008a10 5
3.3.3.3         3.3.3.3         1591        0x80000008 0x003d55 5
1.1.1.1         1.1.1.1         1300        0x80000009 0x0058dc 5