10.1.3.5 Lab – Configuring OSFPv2 Advanced Features (Instructor Version)
Instructor Note: Red font color or gray highlights indicate text that appears in the instructor copy only.
Topology
Addressing Table
| Device | Interface | IP Address | Subnet Mask | Default Gateway |
|---|---|---|---|---|
| R1 | G0/0 | 192.168.1.1 | 255.255.255.0 | N/A |
| S0/0/0 (DCE) | 192.168.12.1 | 255.255.255.252 | N/A | |
| S0/0/1 | 192.168.13.1 | 255.255.255.252 | N/A | |
| R2 | Lo0 | 209.165.200.225 | 255.255.255.252 | N/A |
| S0/0/0 | 192.168.12.2 | 255.255.255.252 | N/A | |
| S0/0/1 (DCE) | 192.168.23.1 | 255.255.255.252 | N/A | |
| R3 | G0/0 | 192.168.3.1 | 255.255.255.0 | N/A |
| S0/0/0 (DCE) | 192.168.13.2 | 255.255.255.252 | N/A | |
| S0/0/1 | 192.168.23.2 | 255.255.255.252 | N/A | |
| PC-A | NIC | 192.168.1.3 | 255.255.255.0 | 192.168.1.1 |
| PC-C | NIC | 192.168.3.3 | 255.255.255.0 | 192.168.3.1 |
Objectives
- Part 1: Build the Network and Configure Basic Device Settings
- Part 2: Configure and Verify OSPF Routing
- Part 3: Change OSPF Metrics
- Part 4: Configure and Propagate a Static Default Route
Background / Scenario
Open Shortest Path First (OSPF) has advanced features to allow changes to be made to control metrics, default route propagation, and security.
In this lab, you will adjust OSPF metrics on the router interfaces and configure OSPF route propagation.
Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers (ISRs) with Cisco IOS Release 15.2(4)M3 (universalk9 image). Other routers and Cisco IOS versions can be used. Depending on the model and Cisco IOS version, the commands available and output produced might vary from what is shown in the labs. Refer to the Router Interface Summary Table at the end of this lab for the correct interface identifiers.
Note: Make sure that the routers have been erased and have no startup configurations. If you are unsure, contact your instructor.
Instructor Note: Refer to the Instructor Lab Manual for the procedures to initialize and reload devices.
Required Resources
- 3 Routers (Cisco 1941 with Cisco IOS Release 15.2(4)M3 universal image or comparable)
- 2 PCs (Windows with terminal emulation program, such as Tera Term)
- Console cables to configure the Cisco IOS devices via the console ports
- Ethernet and serial cables as shown in the topology
Part 1: Build the Network and Configure Basic Device Settings
In Part 1, you will set up the network topology and configure basic settings on the PC hosts and routers.
Step 1: Cable the network as shown in the topology.
Step 2: Initialize and reload the routers as necessary.
Step 3: Configure basic settings for each router.
a. Disable DNS lookup.
b. Configure device name as shown in the topology.
c. Assign class as the privileged EXEC password.
d. Assign cisco as the console and vty passwords.
e. Encrypt the plaintext passwords.
f. Configure a MOTD banner to warn users that unauthorized access is prohibited.
g. Configure logging synchronous for the console line.
h. Configure the IP addresses listed in the Addressing Table for all interfaces.
i. Set the clock rate for all DCE serial interfaces at 128000.
j. Copy the running configuration to the startup configuration.
Step 4: Configure PC hosts.
Refer to the Addressing Table for PC host address information.
Step 5: Test connectivity.
At this point, the PCs are unable to ping each other. However, the routers should be able to ping the directly connected neighbor interfaces, and the PCs should be able to ping their default gateway. Verify and troubleshoot if necessary.
Part 2: Configure and Verify OSPF Routing
In Part 2, you will configure OSPFv2 routing on all routers in the network and then verify that routing tables are updated correctly.
Step 1: Configure the router ID on all routers.
Assign 1 as the process ID for this OSPF process. Each router should be given the following router ID assignments:
- R1 Router ID: 1.1.1.1
- R2 Router ID: 2.2.2.2
- R3 Router ID: 3.3.3.3
R1(config)# router ospf 1
R1(config-router)# router-id 1.1.1.1
R2(config)# router ospf 1
R2(config-router)# router-id 2.2.2.2
R3(config)# router ospf 1
R3(config-router)# router-id 3.3.3.3
Step 2: Configure OSPF network information on the routers.
R1(config)# router ospf 1
R1(config-router)# network 192.168.1.0 0.0.0.255 area 0
R1(config-router)# network 192.168.12.0 0.0.0.3 area 0
R1(config-router)# network 192.168.13.0 0.0.0.3 area 0
R2(config)# router ospf 1
R2(config-router)# network 192.168.12.0 0.0.0.3 area 0
R2(config-router)# network 192.168.23.0 0.0.0.3 area 0
R3(config)# router ospf 1
R3(config-router)# network 192.168.3.0 0.0.0.255 area 0
R3(config-router)# network 192.168.13.0 0.0.0.3 area 0
R3(config-router)# network 192.168.23.0 0.0.0.3 area 0
Step 3: Verify OSPF routing.
a. Issue the show ip ospf neighbor command to verify that each router is listing the other routers in the network.
R1# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 0 FULL/ - 00:00:36 192.168.13.2 Serial0/0/1
2.2.2.2 0 FULL/ - 00:00:33 192.168.12.2 Serial0/0/0
b. Issue the show ip route ospf command to verify that all OSPF networks are present in the routing tables on all routers.
R1# show ip route ospf
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
O 192.168.3.0/24 [110/65] via 192.168.13.2, 00:00:20, Serial0/0/1
192.168.23.0/30 is subnetted, 1 subnets
O 192.168.23.0 [110/128] via 192.168.13.2, 00:12:58, Serial0/0/1
[110/128] via 192.168.12.2, 00:03:38, Serial0/0/0
R2# show ip route ospf
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
O 192.168.1.0/24 [110/65] via 192.168.12.1, 00:06:18, Serial0/0/0
O 192.168.3.0/24 [110/65] via 192.168.23.2, 00:03:38, Serial0/0/1
192.168.13.0/30 is subnetted, 1 subnets
O 192.168.13.0 [110/128] via 192.168.23.2, 00:03:38, Serial0/0/1
[110/128] via 192.168.12.1, 00:04:20, Serial0/0/0
R3# show ip route ospf
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
O 192.168.1.0/24 [110/65] via 192.168.13.1, 00:16:12, Serial0/0/0
192.168.12.0/30 is subnetted, 1 subnets
O 192.168.12.0 [110/128] via 192.168.23.1, 00:06:52, Serial0/0/1
[110/128] via 192.168.13.1, 00:16:12, Serial0/0/0
Step 4: Test end-to-end connectivity.
Ping PC-C from PC-A to verify end-to-end connectivity. The pings should be successful. If they are not, troubleshoot as necessary.
Note: It may be necessary to disable the PC firewall for the pings to be successful.
Part 3: Change OSPF Metrics
In Part 3, you will change OSPF metrics using the bandwidth command, the auto-cost reference-bandwidth command, and the ip ospf cost command. Making these changes will provide more accurate metrics to OSPF.
Note: All DCE interfaces should have been configured with a clocking rate of 128000 in Part 1, Step 3., substep i.
Step 1: Change the bandwidth on all serial interfaces to 128Kb/s.
a. Issue the show ip ospf interface brief command to view the default cost settings on the router interfaces.
R1# show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C Se0/0/1 1 0 192.168.13.1/30 64 P2P 1/1 Se0/0/0 1 0 192.168.12.1/30 64 P2P 1/1 Gi0/0 1 0 192.168.1.1/24 1 DR 0/0
b. Use the bandwidth 128 interface command on all serial interfaces.
R1(config)# interface s0/0/0
R1(config-if)# bandwidth 128
R1(config)# interface s0/0/1
R1(config-if)# bandwidth 128
R2(config)# interface s0/0/0
R2(config-if)# bandwidth 128
R2(config)# interface s0/0/1
R2(config-if)# bandwidth 128
R3(config)# interface s0/0/0
R3(config-if)# bandwidth 128
R3(config)# interface s0/0/1
R3(config-if)# bandwidth 128
c. Issue the show ip ospf interface brief command to view the new cost settings.
R1# show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C Se0/0/1 1 0 192.168.13.1/30 781 P2P 1/1 Se0/0/0 1 0 192.168.12.1/30 781 P2P 1/1 Gi0/0 1 0 192.168.1.1/24 1 DR 0/0
Step 2: Change the reference bandwidth on the routers.
a. Issue the auto-cost reference-bandwidth 1000 command on the routers to change the default reference bandwidth setting to account for Gigabit Ethernet Interfaces.
R1(config)# router ospf 1
R1(config-router)# auto-cost reference-bandwidth 1000
% OSPF: Reference bandwidth is changed.
Please ensure reference bandwidth is consistent across all routers.
R2(config)# router ospf 1
R2(config-router)# auto-cost reference-bandwidth 1000
% OSPF: Reference bandwidth is changed.
Please ensure reference bandwidth is consistent across all routers.
R3(config)# router ospf 1
R3(config-router)# auto-cost reference-bandwidth 1000
% OSPF: Reference bandwidth is changed.
Please ensure reference bandwidth is consistent across all routers.
b. Re-issue the show ip ospf interface brief command to view how this command has changed cost values.
R1# show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C Se0/0/1 1 0 192.168.13.1/30 7812 P2P 0/0 Se0/0/0 1 0 192.168.12.1/30 7812 P2P 0/0 Gi0/0 1 0 192.168.1.1/24 1 DR 0/0
Note: If the router had Fast Ethernet interfaces instead of Gigabit Ethernet interfaces, then the cost would now be 10 on those interfaces.
Step 3: Change the route cost.
a. Issue the show ip route ospf command to display the current OSPF routes on R1. Notice that there are currently two routes in the table that use the S0/0/1 interface.
R1# show ip route ospf
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
O 192.168.3.0/24 [110/7822] via 192.168.13.2, 00:00:12, Serial0/0/1
192.168.23.0/30 is subnetted, 1 subnets
O 192.168.23.0 [110/15624] via 192.168.13.2, 00:00:12, Serial0/0/1
[110/15624] via 192.168.12.2, 00:20:03, Serial0/0/0
b. Apply the ip ospf cost 16000 command to the S0/0/1 interface on R1. A cost of 16,000 is higher than the accumulated cost of the route through R2 which is 15,624.
R1(config)# int s0/0/1
R1(config-if)# ip ospf cost 16000
c. Issue the show ip ospf interface brief command on R1 to view the cost change to S0/0/1.
R1# show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C Se0/0/1 1 0 192.168.13.1/30 16000 P2P 1/1 Se0/0/0 1 0 192.168.12.1/30 7812 P2P 1/1 Gi0/0 1 0 192.168.1.1/24 1 DR 0/0
d. Re-issue the show ip route ospf command on R1 to display the effect this change has made on the routing table. All OSPF routes for R1 are now being routed through R2.
R1# show ip route ospf
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
O 192.168.3.0/24 [110/15625] via 192.168.12.2, 00:05:31, Serial0/0/0
192.168.23.0/30 is subnetted, 1 subnets
O 192.168.23.0 [110/15624] via 192.168.12.2, 01:14:02, Serial0/0/0
Explain why the route to the 192.168.3.0/24 network on R1 is now going through R2? __________________
OSPF will choose the route with the least accumulated cost. The route with the lowest accumulated cost is: R1-S0/0/0 + R2-S0/0/1 + R3-G0/0, or 7812 + 7812 + 1 = 15,625. This metric is smaller than the accumulated cost of R1-S0/0/1 + R3-G0/0, or 16,000 + 1 = 16,001.
Part 4: Configure and Propagate a Static Default Route
In Part 4, you will use a loopback interface on R2 to simulate an ISP connection to the Internet. You will create a static default route on R2, and then OSPF will propagate that route to the other two routers on the network.
Step 1: Configure a static default route on R2 to loopback 0.
Configure a default route using the loopback interface configured in Part 1, to simulate a connection to an ISP.
R2(config)# ip route 0.0.0.0 0.0.0.0 loopback0
Step 2: Have OSPF propagate the default static route.
Issue the default-information originate command to include the static default route in the OSPF updates that are sent from R2.
R2(config)# router ospf 1 R2(config-router)# default-information originate
Step 3: Verify OSPF static route propagation.
a. Issue the show ip route static command on R2.
R2# show ip route static
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is 0.0.0.0 to network 0.0.0.0
S* 0.0.0.0/0 is directly connected, Loopback0
b. Issue the show ip route command on R1 to verify the propagation of the static route from R2.
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is 192.168.12.2 to network 0.0.0.0
O*E2 0.0.0.0/0 [110/1] via 192.168.12.2, 00:02:57, Serial0/0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, GigabitEthernet0/0
L 192.168.1.1/32 is directly connected, GigabitEthernet0/0
O 192.168.3.0/24 [110/15634] via 192.168.12.2, 00:03:35, Serial0/0/0
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/30 is directly connected, Serial0/0/0
L 192.168.12.1/32 is directly connected, Serial0/0/0
192.168.13.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.13.0/30 is directly connected, Serial0/0/1
L 192.168.13.1/32 is directly connected, Serial0/0/1
192.168.23.0/30 is subnetted, 1 subnets
O 192.168.23.0 [110/15624] via 192.168.12.2, 00:05:18, Serial0/0/0
c. Verify end-to-end connectivity by issuing a ping from PC-A to the ISP interface address 209.165.200.225.
Were the pings successful? _______Yes
Reflection
- What is the easiest and preferred method of manipulating OSPF route costs? __________________
Using the ip ospf cost command overrides the cost calculation completely and sets the link cost to the desired amount. - What does the default-information originate command do for a network using the OSPF routing protocol? __________________
The default-information originate command is used to inject a default route into an OSPF area which will propagate the default route to other OSPF routers.
Router Interface Summary Table
| Router Interface Summary | ||||
|---|---|---|---|---|
| Router Model | Ethernet Interface #1 | Ethernet Interface #2 | Serial Interface #1 | Serial Interface #2 |
| 1800 | Fast Ethernet 0/0 (F0/0) | Fast Ethernet 0/1 (F0/1) | Serial 0/0/0 (S0/0/0) | Serial 0/0/1 (S0/0/1) |
| 1900 | Gigabit Ethernet 0/0 (G0/0) | Gigabit Ethernet 0/1 (G0/1) | Serial 0/0/0 (S0/0/0) | Serial 0/0/1 (S0/0/1) |
| 2801 | Fast Ethernet 0/0 (F0/0) | Fast Ethernet 0/1 (F0/1) | Serial 0/1/0 (S0/1/0) | Serial 0/1/1 (S0/1/1) |
| 2811 | Fast Ethernet 0/0 (F0/0) | Fast Ethernet 0/1 (F0/1) | Serial 0/0/0 (S0/0/0) | Serial 0/0/1 (S0/0/1) |
| 2900 | Gigabit Ethernet 0/0 (G0/0) | Gigabit Ethernet 0/1 (G0/1) | Serial 0/0/0 (S0/0/0) | Serial 0/0/1 (S0/0/1) |
| Note: To find out how the router is configured, look at the interfaces to identify the type of router and how many interfaces the router has. There is no way to effectively list all the combinations of configurations for each router class. This table includes identifiers for the possible combinations of Ethernet and Serial interfaces in the device. The table does not include any other type of interface, even though a specific router may contain one. An example of this might be an ISDN BRI interface. The string in parenthesis is the legal abbreviation that can be used in Cisco IOS commands to represent the interface. | ||||
Device Configs
Router R1 (After parts 1 and 2 of this lab)
R1#sh run Building configuration... Current configuration : 1557 bytes ! version 15.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption ! hostname R1 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model memory-size iomem 15 ! ip cef ! no ip domain lookup no ipv6 cef multilink bundle-name authenticated ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 ip address 192.168.1.1 255.255.255.0 duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 ip address 192.168.12.1 255.255.255.252 clock rate 128000 ! interface Serial0/0/1 ip address 192.168.13.1 255.255.255.252 ! router ospf 1 router-id 1.1.1.1 network 192.168.1.0 0.0.0.255 area 0 network 192.168.12.0 0.0.0.3 area 0 network 192.168.13.0 0.0.0.3 area 0 ! ip forward-protocol nd ! no ip http server no ip http secure-server ! control-plane ! banner motd ^C Unauthorized Access is Prohibited! ^C ! line con 0 password 7 01100F175804 logging synchronous login line aux 0 line 2 no activation-character no exec transport preferred none transport input all transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 password 7 045802150C2E login transport input all scheduler allocate 20000 1000 ! end
Router R2 (After parts 1 and 2 of this lab)
R2#sh run Building configuration... Current configuration : 1572 bytes ! version 15.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption ! hostname R2 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model memory-size iomem 15 ! ip cef ! no ip domain lookup no ipv6 cef multilink bundle-name authenticated ! interface Loopback0 ip address 209.165.200.225 255.255.255.252 ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 no ip address shutdown duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 ip address 192.168.12.2 255.255.255.252 ! interface Serial0/0/1 ip address 192.168.23.1 255.255.255.252 clock rate 128000 ! router ospf 1 router-id 2.2.2.2 network 192.168.12.0 0.0.0.3 area 0 network 192.168.23.0 0.0.0.3 area 0 ! ip forward-protocol nd ! no ip http server no ip http secure-server ! control-plane ! banner motd ^C Unauthorized Access is Prohibited! ^C ! line con 0 password 7 01100F175804 logging synchronous login line aux 0 line 2 no activation-character no exec transport preferred none transport input all transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 password 7 030752180500 login transport input all scheduler allocate 20000 1000 ! end
Router R3 (After parts 1 and 2 of this lab
R3#sh run Building configuration... Current configuration : 1596 bytes ! version 15.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption ! hostname R3 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model memory-size iomem 15 ! ip cef ! no ip domain lookup no ipv6 cef multilink bundle-name authenticated ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 ip address 192.168.3.1 255.255.255.0 duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 ip address 192.168.13.2 255.255.255.252 clock rate 128000 ! interface Serial0/0/1 ip address 192.168.23.2 255.255.255.252 ! router ospf 1 router-id 3.3.3.3 network 192.168.3.0 0.0.0.255 area 0 network 192.168.13.0 0.0.0.3 area 0 network 192.168.23.0 0.0.0.3 area 0 ! ip forward-protocol nd ! no ip http server no ip http secure-server ! control-plane ! banner motd ^C Unauthorized Access is Prohibited! ^C ! line con 0 password 7 01100F175804 logging synchronous login line aux 0 line 2 no activation-character no exec transport preferred none transport input all transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 password 7 05080F1C2243 login transport input all scheduler allocate 20000 1000 ! End
Router R1 (Final)
R1# show run Building configuration... Current configuration : 1895 bytes ! version 15.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption ! hostname R1 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model memory-size iomem 15 ! ip cef ! no ip domain lookup no ipv6 cef multilink bundle-name authenticated ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 ip address 192.168.1.1 255.255.255.0 duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 bandwidth 128 ip address 192.168.12.1 255.255.255.252 clock rate 128000 ! interface Serial0/0/1 bandwidth 128 ip address 192.168.13.1 255.255.255.252 ip ospf cost 16000 ! router ospf 1 router-id 1.1.1.1 auto-cost reference-bandwidth 1000 network 192.168.1.0 0.0.0.255 area 0 network 192.168.12.0 0.0.0.3 area 0 network 192.168.13.0 0.0.0.3 area 0 ! ip forward-protocol nd ! no ip http server no ip http secure-server ! control-plane ! banner motd @ Unauthorized Access is Prohibited! @ ! line con 0 password 7 01100F175804 logging synchronous login line aux 0 line 2 no activation-character no exec transport preferred none transport input all transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 password 7 045802150C2E login transport input all ! scheduler allocate 20000 1000 ! end
Router R2 (Final)
R2# show run Building configuration... Current configuration : 1878 bytes ! version 15.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption ! hostname R2 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model memory-size iomem 15 ! ip cef ! no ip domain lookup no ipv6 cef multilink bundle-name authenticated ! interface Loopback0 ip address 209.165.200.225 255.255.255.252 ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 no ip address shutdown duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 bandwidth 128 ip address 192.168.12.2 255.255.255.252 ! interface Serial0/0/1 bandwidth 128 ip address 192.168.23.1 255.255.255.252 clock rate 128000 ! router ospf 1 router-id 2.2.2.2 auto-cost reference-bandwidth 1000 network 192.168.12.0 0.0.0.3 area 0 network 192.168.23.0 0.0.0.3 area 0 default-information originate ! ip forward-protocol nd ! no ip http server no ip http secure-server ! ip route 0.0.0.0 0.0.0.0 Loopback0 ! control-plane ! banner motd @ Unauthorized Access is Prohibited! @ ! line con 0 password 7 01100F175804 logging synchronous login line aux 0 line 2 no activation-character no exec transport preferred none transport input all transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 password 7 030752180500 login transport input all ! scheduler allocate 20000 1000 ! end
Router R3 (Final)
R3# show run Building configuration... Current configuration : 1904 bytes ! version 15.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption ! hostname R3 ! boot-start-marker boot-end-marker ! enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2 ! no aaa new-model memory-size iomem 15 ! ip cef ! no ip domain lookup no ipv6 cef ! multilink bundle-name authenticated ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 ip address 192.168.3.1 255.255.255.0 duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 bandwidth 128 ip address 192.168.13.2 255.255.255.252 clock rate 128000 ! interface Serial0/0/1 bandwidth 128 ip address 192.168.23.2 255.255.255.252 ! router ospf 1 router-id 3.3.3.3 auto-cost reference-bandwidth 1000 network 192.168.3.0 0.0.0.255 area 0 network 192.168.13.0 0.0.0.3 area 0 network 192.168.23.0 0.0.0.3 area 0 ! ip forward-protocol nd ! no ip http server no ip http secure-server ! control-plane ! banner motd @ Unauthorized Access is Prohibited! @ ! line con 0 password 7 01100F175804 logging synchronous login line aux 0 line 2 no activation-character no exec transport preferred none transport input all transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 password 7 05080F1C2243 login transport input all ! scheduler allocate 20000 1000 ! end
