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Question 606

Refer to the exhibit. An engineer must troubleshoot a connectivity issue impacting the redistribution of the subnet 172.16.2.48/28 into the OSPF domain. Which configuration on router R1 advertises this subnet into the OSPF domain?

R1(config)#route-map CCNP permit 10

R1(config-route-map)#match tag 200

R1(conflg-route-map)#exit -

R1(config)#router ospf 10 -

R1(config-router)#redistribute eigrp 100 subnets route-map CCNP

R1(config)#route-map CCNP deny 10

R1(conflg-route-map)#match tag 200

R1(config)#route-map CCNP permit 10

R1(config)#router ospf 10 -

R1(conflg-router)#redistrlbute eigrp 100 subnets route-map CCNP

R1(config)#route-map CCNP permit 10

R1(config-route-map)#match route-type internal

R1(config)#router ospf 10 -

R1(config-router)#redistribute eigrp 100 subnets route-map CCNP

R1(config)#route-map CCNP permit 10

R1(config-route-map)#match route-type level-2

R1(config)#router ospf 10 -

R1(config-router)#redistribute eigrp 100 subnets route-map CCNP

Correct Answer: B

To configure router R1 to advertise the 172.16.2.48/28 subnet into the OSPF domain, it is necessary to ensure that the EIGRP external routes are tagged appropriately for redistribution. This can be achieved using a route-map. Here, the correct approach is to first deny routes with a specific tag (tag 200 in this case) and then permit other routes. Therefore, the configuration should deny routes matching tag 200 and then permit other routes, followed by redistributing EIGRP into OSPF using this route-map. This ensures that the specified subnet is properly advertised into OSPF.

Discussion

krobo

Seems good

PietjeplukgelukOption: B

A == wrong as it is unlikely the EIGRP external route is tagged with 200, if not, the 172.16.2.48/28 will not be redistributed. Please note non-tagged routes are dropped due to implict deny in a route-map B == seems correct implies tagging redistributed route with tag 200, so only routes without a tag of 200 will be redistributed C == wrong, as it matches "route-type internal", the route "172.16.2.48/28" == external type (eigrp: D EX) D == wrong, as it matches "route-type level-2" and this is only required when using IS-IS level-2 routes == not applicable here WAN(config-route-map)#match route-type ? external external route (BGP, EIGRP and OSPF type 1/2) internal internal route (including OSPF intra/inter area) level-1 IS-IS level-1 route level-2 IS-IS level-2 route local locally generated route nssa-external nssa-external route (OSPF type 1/2)