2.6 Troubleshoot Routing Protocols 350-501 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · medium

   An engineer is troubleshooting why a new loopback prefix on a Level 2 IS-IS router is not being advertised to an adjacent Level 2 router. The adjacency is up, and the new prefix is configured with the correct network layer protocol. Which condition would prevent the prefix from being included in Link State PDUs (LSPs) sent by the originating router?

   • AThe prefix is not present in the IS-IS database because the router was not configured with the network entity title (NET) that includes the area address.
   • BThe interface for the loopback is not configured with the isis circuit-type level-2 command.
   • CThe prefix is not included in an IP prefix-list used by the distribute-list in the IS-IS process.
   • DThe loopback prefix is not enabled for IS-IS because the ip router isis command is missing on the loopback interface.
   Reveal Solution Discussion Select an answer first
2. 7foundation · medium · select all that apply

   An engineer is troubleshooting an OSPFv2 adjacency that will not form between two directly connected routers. The interfaces are up/up, IP addresses are on the same subnet, and both routers have the same OSPF process ID. Which two parameters must also match on both routers for the adjacency to form?

   • AProcess ID and router ID
   • BRouter ID and area ID
   • CArea ID and network type
   • DHello interval and dead interval
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4. 8application · medium

   A service provider is advertising a customer's prefix to the internet. The prefix is not being propagated beyond the provider's AS. The BGP session with the customer is up, and the prefix is in the provider's BGP table. What is the most likely cause?

   • AThe prefix is not in the routing table of the provider's edge router.
   • BThe prefix is being filtered by an outbound route policy to upstream peers.
   • CThe prefix is not being originated by the customer's router.
   • DThe prefix is not being summarized at the AS boundary.
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   An OSPF router is not advertising a directly connected subnet to its neighbors. The interface is up, the subnet is correctly configured, and the router has a route to it. Which configuration is most likely missing?

   • AThe OSPF cost on the interface is set to a high value.
   • BThe interface is not included in the OSPF network statement.
   • CThe OSPF router ID is not configured.
   • DThe OSPF process has a low priority on the interface.
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   An IS-IS router is configured as Level-1 only, and its neighbor is configured as Level-2 only. What is the result?

   • AThe routers will form a Level-2 adjacency.
   • BThe routers will form a Level-1 adjacency.
   • CThe routers will form a Level-1-2 adjacency.
   • DThe routers will not form an adjacency.
   Reveal Solution Discussion Select an answer first