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=3ms 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 = 3ms, Average = 1ms

C:\>ping 200.100.3.3

Pinging 200.100.3.3 with 32 bytes of data:

Reply from 200.100.3.3: bytes=32 time=3ms TTL=126
Reply from 200.100.3.3: bytes=32 time=1ms TTL=126
Reply from 200.100.3.3: bytes=32 time=3ms TTL=126
Reply from 200.100.3.3: bytes=32 time=3ms TTL=126

Ping statistics for 200.100.3.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 3ms, Average = 2ms







R1
R1#show running-config 
Building configuration...

Current configuration : 1339 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
service password-encryption
!
hostname R1
!
!
!
enable password 7 0824544B0A
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524QIM1-
!
!
!
!
!
!
!
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
interface GigabitEthernet0/0
description To 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 To R2
bandwidth 128
ip address 200.100.12.1 255.255.255.252
ip ospf priority 200
clock rate 128000
!
interface Serial0/3/1
description To R3
ip address 200.100.13.1 255.255.255.252
ip ospf priority 200
!
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 200.100.1.0 0.0.0.255 area 0
network 200.100.12.0 0.0.0.3 area 0
network 200.100.13.0 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
banner motd ^CUnauthorized access prohibited!^C
!
!
!
!
!
line con 0
password 7 082D45400C
logging synchronous
login
!
line aux 0
!
line vty 0
password 7 08375857
logging synchronous
login
line vty 1 4
login
!
!
!
!
line con 0
password 7 082D45400C
logging synchronous
login
!
line aux 0
!
line vty 0
password 7 08375857
logging synchronous
login
line vty 1 4
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 [110/657] via 200.100.12.2, 00:12:13, Serial0/3/0
O 200.100.3.0/24 [110/657] via 200.100.13.2, 00:13:00, 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 [110/1294] via 200.100.12.2, 00:12:03, Serial0/3/0
[110/1294] via 200.100.13.2, 00:12:03, Serial0/3/1

R1#show ip ospf neighbor 


Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 0 FULL/ - 00:00:31 200.100.12.2 Serial0/3/0
3.3.3.3 0 FULL/ - 00:00:39 200.100.13.2 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
200.100.13.1 200.100.13.1 2202 0x80000005 0x002ed1 5
200.100.23.1 200.100.23.1 1241 0x80000007 0x0058bc 5
200.100.23.2 200.100.23.2 1154 0x80000007 0x00bc90 5
1.1.1.1 1.1.1.1 964 0x8000000f 0x000f9e 5
3.3.3.3 3.3.3.3 887 0x8000000e 0x003458 5
2.2.2.2 2.2.2.2 840 0x8000000f 0x00bbd7 5






R2
R2#show running-config 
Building configuration...

Current configuration : 1288 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
!
!
enable password exec
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX15245S2N-
!
!
!
!
!
!
!
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
description To 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 To R1
bandwidth 128
ip address 200.100.12.2 255.255.255.252
!
interface Serial0/3/1
description To R3
ip address 200.100.23.1 255.255.255.252
clock rate 128000
!
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 200.100.2.0 0.0.0.255 area 0
network 200.100.12.0 0.0.0.3 area 0
network 200.100.23.0 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
no cdp run
!
banner motd ^CUnauthorized access prohibited!^C
!
!
!
!
!
line con 0
password line
logging synchronous
login
!
line aux 0
!
line vty 0
password vty
logging synchronous
login
line vty 1 4
login
!
!
!
!
!
!
line con 0
password line
logging synchronous
login
!
line aux 0
!
line vty 0
password vty
logging synchronous
login
line vty 1 4
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, 00:18:34, 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, 00:18:34, 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, 00:18:34, Serial0/3/0
[110/1294] via 200.100.23.2, 00:18:34, 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/ - 00:00:30 200.100.23.2 Serial0/3/1
1.1.1.1 200 FULL/ - 00:00:39 200.100.12.1 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
200.100.13.1 200.100.13.1 2539 0x80000005 0x002ed1 5
200.100.23.1 200.100.23.1 1578 0x80000007 0x0058bc 5
200.100.23.2 200.100.23.2 1491 0x80000007 0x00bc90 5
1.1.1.1 1.1.1.1 1300 0x8000000f 0x000f9e 5
3.3.3.3 3.3.3.3 1223 0x8000000e 0x003458 5
2.2.2.2 2.2.2.2 1176 0x8000000f 0x00bbd7 5






R3
R3#show running-config 
Building configuration...

Current configuration : 1293 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
service password-encryption
!
hostname R3
!
!
!
enable password 7 0824544B0A
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2901/K9 sn FTX1524F9CE-
!
!
!
!
!
!
!
!
!
no ip domain-lookup
!
!
spanning-tree mode pvst
!
!
!
!
!
!
!
!
interface GigabitEthernet0/0
description To 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 To R1
ip address 200.100.13.2 255.255.255.252
clock rate 128000
!
interface Serial0/3/1
description 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 200.100.3.0 0.0.0.255 area 0
network 200.100.13.0 0.0.0.3 area 0
network 200.100.23.0 0.0.0.3 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
no cdp run
!
banner motd ^CUnauthorized access prohibited!^C
!
!
!
!
!
line con 0
password 7 082D45400C
logging synchronous
login
!
line aux 0
!
line vty 0
password 7 08375857
logging synchronous
login
line vty 1 4
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, 00:23:27, Serial0/3/0
O 200.100.2.0/24 [110/657] via 200.100.23.1, 00:22:35, 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 [110/1294] via 200.100.13.1, 00:22:35, Serial0/3/0
[110/1294] via 200.100.23.1, 00:22:35, Serial0/3/1
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
1.1.1.1 200 FULL/ - 00:00:39 200.100.13.1 Serial0/3/0
2.2.2.2 0 FULL/ - 00:00:35 200.100.23.1 Serial0/3/1

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
200.100.13.1 200.100.13.1 2797 0x80000005 0x002ed1 5
200.100.23.1 200.100.23.1 1836 0x80000007 0x0058bc 5
200.100.23.2 200.100.23.2 1749 0x80000007 0x00bc90 5
1.1.1.1 1.1.1.1 1558 0x8000000f 0x000f9e 5
3.3.3.3 3.3.3.3 1481 0x8000000e 0x003458 5
2.2.2.2 2.2.2.2 1434 0x8000000f 0x00bbd7 5
