CCNP Route FAQ: Advanced IGP Redistribution
Q1. Router R1 has been configured with the redistribute ospf 1 route-map fred command under router eigrp 1. The route map named fred needs to be configured to match routes to determine which routes are redistributed into EIGRP. Which of the following answers lists an item that cannot be matched by route map fred?
a. Subnet number
b. Next-hop router IP address of the route
c. Whether the route is an E1 or E2 route
d. The route’s tag
e. The number of router hops between the router and the subnet
Q2. Router R1 refers to route-map fred when redistributing from EIGRP into OSPF. The entire route-map is listed next. Which of the following answers must be true based on the configuration as shown?
route-map fred deny 10
match ip address one
route-map fred deny 20
match ip address two
route-map fred permit 100
a. The third route map clause will allow any routes not already filtered by the first two clauses.
b. Routes permitted by ACL “two” will be redistributed.
c. Routes denied by ACL “one” will be redistributed.
d. All routes will be filtered.
Q3. On Router R1, process EIGRP 1 is redistributing routes from process OSPF 2, calling route-map fred with the redistribute ospf 2 command. R1 has learned intra-area routes for 10.1.1.0/24 and 10.1.2.0/24 in part due to the Type 2 LSAs known for each subnet. The route map filters route 10.1.1.0/24 and allows 10.1.2.0/24 through. Which of the following commands on router R1 list subnet 10.1.1.0/24? (Choose two.)
a. show ip route
b. show ip eigrp topology
c. show ip ospf topology
d. show ip eigrp topology 10.1.1.0/24
Q4. Router R1 is redistributing between two OSPF processes. Given the configuration shown, which includes all commands in the route map named fred, which of the following answers is true regarding the redistribution into OSPF process 1?
router ospf 1
redistribute ospf 2 external 2 route-map fred
route-map fred permit 10
match ip address 1
set metric-type type-1
a. No routes are redistributed because a route cannot be both E1 and E2.
b. Only OSPF E2 routes in the OSPF 2 domain will be considered for redistribution.
c. Inside the OSPF 2 domain, any formerly E2 routes will become E1 routes.
d. Routes permitted by ACL 1 will be redistributed, regardless of whether the routes are E1 or E2 routes.
Q5. Which of the following is not true regarding IOS default settings for administrative distance?
a. EIGRP internal: 90
b. OSPF external: 110
c. EIGRP external: 90
d. RIP: 120
e. OSPF internal: 110
Q6. A network includes a RIPv2 domain, an EIGRP domain, and an OSPF domain. Each pair of routing domains has multiple routers redistributing routes between the pair of domains. The design requires that the redistribution configuration avoid matching based on prefix/length because of the trouble in maintaining such configurations. Which one of the following tools can be used in all three routing domains to attempt to prevent domain loops? (This book uses the term domain loop to refer to the long routes that might be chosen for routes when redistribution exists–for example, a route may forward packets from the EIGRP domain, to the OSPF domain, back to EIGRP, and then to subnet X in the RIP domain.)
a. Setting route tags
b. Setting the default administrative distance differently for internal and external routes
c. Setting administrative distance differently per route
d. Setting metrics much higher for all external routes than for all internal routes
Q7. A co-worker is developing an implementation plan for a design that uses OSPF 2 and RIPv2 routing domains, with two routers redistributing between the two domains. The co-worker asks your help in choosing how to prevent domain loops by setting administrative distance. (This chapter uses the term domain loop to refer to the long routes that might be chosen for routes when redistribution exists–for example, a route may forward packets from the EIGRP 1 domain, to OSPF2, back to EIGRP 1, and then to subnet X in the RIP domain.) Assuming all other related settings use defaults, which of the following would solve the domain loop problem?
a. The distance ospf intra-area 80 inter-area 80 OSPF subcommand
b. The distance ospf external 80 OSPF subcommand
c. The distance ospf intra-area 180 inter-area 180 OSPF subcommand
d. The distance ospf external 180 OSPF subcommand
Q8. Router R1 sets a route tag for subnet 10.1.1.0/24 when redistributing from OSPF into EIGRP. Which of the following unit is assigned to the route tag?
b. Tens of microseconds.
d. Hop count.
e. No unit is assigned.