CCNP Route FAQ: Basic IGP Redistribution
Q1. Which of the following answers is the least likely reason for an engineer to choose to use route redistribution?
a. To exchange routes between merged companies
b. To give separate control over routing to different parts of one company
c. To support multiple router vendors
d. To knit together an OSPF area if the area becomes discontiguous
Q2. For a router to successfully redistribute routes between OSPF and EIGRP, which of the following are true? (Choose two.)
a. The router must have one routing protocol configured, but configuration for both routing protocols is not necessary.
b. The router must have at least one working link connected to each routing domain.
c. The redistribute command must be configured under EIGRP to send the routes to OSPF.
d. The redistribute command should be configured under OSPF to take routes from EIGRP into OSPF.
Q3. Process EIGRP 1 is redistributing routes from process OSPF 2. Which two of the following methods may be used to set the metrics of the redistributed routes? (Choose 2)
a. Let the metrics default.
b. Set the metric components using the redistribute command’s metric keyword.
c. Set the metric components using the default-metric router subcommand.
d. Set the integer (composite) metric using the redistribute command’s metric keyword.
Q4. Examine the following excerpt from the show ip eigrp topology 10.2.2.0/24 command on router R1. Which answer can be verified as definitely true based on this output?
External data: Originating router is 10.1.1.1 AS number of route is 1 External protocol is OSPF, external metric is 64 Administrator tag is 0 (0x00000000)
a. R1 is the router that redistributed the route.
b. R1’s metric to reach subnet 10.2.2.0/24 is 64.
c. The route was redistributed on a router that has a router ospf 1 command configured.
d. R1 is redistributing a route to prefix 10.2.2.0/24 into OSPF.
Q5. Router R1 has a connected route for 10.1.1.0/24 off interface Fa0/0. Interface Fa0/0 has been enabled for OSPF due to a router ospf 1 and network 10.0.0.0 0.0.0.255 area 0 command. R1 also has EIGRP configured, with the redistribute ospf 1 metric 1000 100 10 1 1500 command configured under EIGRP. Which one of the following is true?
a. R1 will not redistribute 10.1.1.0/24 into EIGRP, because R1 knows it as a connected route and not as an OSPF route.
b. For any OSPF routes redistributed into EIGRP, the metric components include a value equivalent to 1 Mbps of bandwidth.
c. For any OSPF routes redistributed into EIGRP, the metric components include a value equivalent to 100 microseconds of delay.
d. No subnets of network 10.0.0.0 will be redistributed due to the omission of the subnets parameter.
Q6. Process OSPF 1 is redistributing routes from process OSPF 2. Which of the following methods may be used to set the metrics of the redistributed routes? (Choose two.)
a. Let the metrics default.
b. Use each redistributed route’s OSPF metric using the redistribute command’s metric transparent keywords.
c. Set the metric using the default-metric router subcommand.
d. Redistribution is not allowed between two OSPF processes.
Q7. Examine the following excerpt from the show ip ospf database asbr-summary command on router R1 (RID 220.127.116.11). Which answer can be verified as definitely true based on this output?
LS Type: Summary Links (AS Boundary Router) Link State ID: 18.104.22.168 (AS Boundary Router address) Advertising Router: 22.214.171.124 LS Seq Number: 8000000D Checksum: 0xE43A Length: 28 Network Mask: /0 TOS: 0 Metric: 100
a. The output describes the contents of a Type 5 LSA.
b. 126.96.36.199 identifies a router as being the router performing redistribution.
c. R1’s metric for its best route to reach the router with RID 188.8.131.52 is 100.
d. The router with RID 184.108.40.206’s metric for its best route to reach the router with RID 220.127.116.11 is 100.
Q8. Router R1 sits inside OSPF area 1. Router R2 redistributes an E1 route into OSPF for prefix 18.104.22.168/24, with external metric 20. Router R22 redistributes an E2 route for the same prefix/length, external metric 10. Under what conditions will R1 choose as its best route the route through R22?
a. R1 will always choose the route through R22.
b. As long as R1’s best internal OSPF cost to reach R22 is less than 10.
c. As long as R1’s best internal OSPF cost to reach R22 is less than 20.
d. R1 will never choose the route through R22 if the E1 route through R2 is available.