Cisco CCNP Certification / BSCI Exam Practice Questions:

Multi-Area OSPF, Redistribution, and Routing Tables

By Chris Bryant, CCIE #12933

To help you along in your BSCI studies, here are 10 questions to test your knowledge of multi-area OSPF. Enjoy! Answers and explanations appear at the bottom of the page.

1. What does the "IA" mean in the following route table ?

R1#show ip route ospf

2.0.0.0/32 is subnetted, 1 subnets

O IA 2.2.2.2 [110/65] via 172.12.123.2, 00:00:00, Serial0  

A. The destination network is in another area.

B. The destination network is in the same area as R1.

C. The destination network was learned via route redistribution.

D. The destination network will be reached via a default route.

2. On an ABR, the full command to configure under the OSPF router process to make Area 781 a totally stub area is ____________.  

3. By default, how does an OSPF routing table indicate routes that were learned by the OSPF domain via redistribution?  

A. O EX

B. O *IA

C. O E2

D. O E1

4. R1 is performing two-way route redistribution between RIPv2 and OSPF. R1's sole interface in the OSPF domain is in Area 0. You discover that Type 7 LSAs are being sent from R1 into the OSPF domain. What does this indicate?  

A. Area 0 has been configured as total stub.

B. This cannot happen.

C. Area 0 has been configured as NSSA.

D. Area 0 has been configured as a total stub.

E. This is the expected behavior.

5. You are redistributing RIP routes into OSPF. You want the OSPF cost of the redistributed routes to reflect the cost of the entire path from source to destination. Which of the following commands will perform this?  

A. (config-router)#redistribute rip subnets

B. (config-router)#redistribute rip subnets path-cost asbr

C. No command is necessary, this is the default.

D. (config-router)#redistribute rip subnets metric-type 1

6. Cisco OSPF design guidelines suggest a router have no more than ____________ neighbors.

7. You're performing two-way route redistribution between an EIGRP AS and an OSPF domain. On the OSPF routers, what is the default routing table code for the routes learned from EIGRP?  

A. O E1

B. O E2

C. D EX

D. D

E. O IA

F. O

8. You want R4 to have only a single default route in its routing table. Area 34 has already been configured as a stub area. What action should be taken?

A. Remove the "no-summary" option from R4's stub command.

B. Add the "no-summary" option to R4's stub command.

C. Add the "no-summary" option to R3's stub command.

D. Remove the "no-summary" option from R3's stub command.

E. Nothing.

9. The cost of an E2 route indicates what?  

A. The cost of the path from the ABR to the destination network.

B. The full cost of the path to the destination network.

C. The cost of the path from the local router to the ASBR.

D. The cost of the path from the ASBR to the destination network.

10. You are running RIPv2 and OSPF on a single router. Your RIP domain is carrying VLSM information in its updates and you want those subnets in your OSPF domain. What command will perform this task?  

A. redistribute rip subnets

B. redistribute ospf rip subnets

C. redistribute

D. redistribute rip

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Here are the answers to these CCNP BSCI exam questions!

1. A. "O IA" indicates an OSPF-discovered route to a destination network in another area.

2. The necessary command is area 781 stub no-summary. The command "area x stub no-summary" is configured on the ABR to make an area a total stub area.

3. C. Routes learned by OSPF via redistribution are marked in the routing table as External Type-2 routes by default - "O E2".

4. B. What I've described can't happen. Why? Because Type 7 LSAs are only sent into NSSAs (not-so-stubby areas), and Area 0 cannot be any kind of stub area.

5. D. By default, the routes are redistributed into OSPF as E2, meaning only the cost from the ASBR to the destination network is shown in the routing table. To redistribute them as E1 routes, which reflect the entire path cost from source to destination, use the metric-type 1 option.

6. Cisco suggests a single OSPF-enabled router have no more than 60 neighbors.

7. B. These routes will appear as OSPF External Type 2 routes, with a routing table code of E2. (The routes that are redistributed from OSPF into EIGRP will appear in the EIGRP routing tables with a code of D EX.)

8. C. For R4 to have only the single default route, the area has to be configured as a total stub. That is done by configuring "area 34 stub no-summary" on the ABR, R3. Putting it on R4 will have no effect.

9. D. The default setting for a route learned by OSPF via redistribution is E2. The metric of an E2 route is only the cost of the path from the ASBR to the destination network. It does not include the cost from the local router to the ASBR. But by this point in this practice exam, you knew that. :)

10. A. Under the OSPF process, run "redistribute rip subnets". If you do not specify subnets and just run "redistribute rip", only the major network numbers will be redistributed.

R1(config)#router ospf 1
R1(config-router)#redistribute rip
% Only classful networks will be redistributed
R1(config-router)#redistribute rip subnets

To your success,

Chris Bryant

CCIE #12933

chris@thebryantadvantage.com