Cisco CCNP Enterprise 300-410 Questions & Answers

• Question 831:

  Refer to the exhibit. R2 is a route reflector, and R1 and R3 are route reflector clients. The route reflector learns the route to 172.16.25.0/24 from R1, but it does not advertise to R3. What is the reason the route is not advertised?

  

  A. R2 does not have a route to the next hop, so R2 does not advertise the prefix to other clients.

  B. Route reflector setup requires full IBGP mesh between the routers.

  C. In route reflector setup, only classful prefixes are advertised to other clients.

  D. In route reflector setups, prefixes are not advertised from one client to another.

  Correct Answer: A

• Question 832:

  Refer to the exhibit.

  

  An engineer is trying to redistribute OSPF to BGP, but not all of the routes are redistributed. What is the reason for this issue?

  A. By default, only internal routes and external type 1 routes are redistributed into BGP

  B. Only classful networks are redistributed from OSPF to BGP

  C. BGP convergence is slow, so the route will eventually be present in the BGP table

  D. By default, only internal OSPF routes are redistributed into BGP

  Correct Answer: D

  If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area and inter-area routes are redistributed into BGP, by default.

  You can redistribute both internal and external (type-1 and type-2) OSPF routes via this command:

  Router(config-router)#redistribute ospf 1 match internal external 1 external 2

• Question 833:

  Refer to the exhibit.

  

  In which circumstance does the BGP neighbor remain in the idle condition?

  A. if prefixes are not received from the BGP peer

  B. if prefixes reach the maximum limit

  C. if a prefix list is applied on the inbound direction

  D. if prefixes exceed the maximum limit

  Correct Answer: D

  https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/25160-bgp- maximum-prefix.html#b

• Question 834:

  Which attribute eliminates LFAs that belong to protected paths in situations where links in a network are connected through a common fiber?

  A. Shared Risk Link Group (SRLG)-disjoint

  B. linecard-disjoint

  C. lowest-repair-path-metric

  D. interface-disjoint

  Correct Answer: A

  LFA Tie-Breaking Rules

  When there are multiple candidate LFAs for a given primary path, EIGRP uses a tie-breaking rule to select one LFA per primary path per prefix. A tie-breaking rule considers LFAs that satisfy certain conditions or have certain attributes.

  EIGRP uses the following four attributes to implement tie-breaking rules:

  Interface-disjoint-Eliminates LFAs that share the outgoing interface with the protected path.

  Linecard-disjoint-Eliminates LFAs that share the line card with the protected path.

  Lowest-repair-path-metric-Eliminates LFAs whose metric to the protected prefix is high. Multiple LFAs with the same lowest path metric may remain in the routing table after this tie-breaker is applied.

  - Shared Risk Link Group (SRLG)-disjoint-Eliminates LFAs that belong to any of the protected path SRLGs. SRLGs refer to situations where links in a network share a common fiber (or a common physical attribute). If one link fails, other links in the group may also fail. Therefore, links in a group share risks.

  Source : https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/xe-3s/asr1000/ire-xe-3s-asr1000/ire-ipfrr.html

• Question 835:

  Refer to the exhibit.

  

  An engineer is troubleshooting BGP on a device but discovers that the clock on the device does not correspond to the time stamp of the log entries. Which action ensures consistency between the two times?

  A. Configure the service timestamps log uptime command in global configuration mode.

  B. Configure the logging clock synchronize command in global configuration mode.

  C. Configure the service timestamps log datetime localtime command in global configuration mode.

  D. Make sure that the clock on the device is synchronized with an NTP server.

  Correct Answer: C

  The Time zone needs to be changed. default it UTC Central European Time (CET) https://community.cisco.com/t5/networking-documents/router-log-timestamp-entries-are-different-from-the-system-clock/ta-p/3132258

• Question 836:

  Refer to the exhibit. An engineer is trying to generate a summary route in OSPF for network 10.0.0.0/8, but the summary route does not show up in the routing table. Why is the summary route missing?

  

  A. The summary-address command is used only for summarizing prefixes between areas.

  B. The summary route is visible only in the OSPF database, not in the routing table.

  C. There is no route for a subnet inside 10.0.0.0/8, so the summary route is not generated.

  D. The summary route is not visible on this router, but it is visible on other OSPF routers in the same area.

  Correct Answer: C

  The summary-address is only used to create aggregate addresses for OSPF at an autonomous system boundary.

  It means this command should only be used on the ASBR when you are trying to summarize externally redistributed routes from another protocol domain or you have a NSSA area. But a requirement to create a summarized route is:

  The ASBR compares the summary route's range of addresses with all routes redistributed into OSPF on that ASBR to find any subordinate subnets (subnets that sit inside the summary route range). If at least one subordinate subnet exists,

  the ASBR advertises the summary route.

• Question 837:

  Refer to the exhibit. An engineer is trying to block the route to 192.168.2.2 from the routing table by using the configuration that is shown. The route is still present in the routing table as an OSPF route. Which action blocks the route?

  

  A. Use an extended access list instead of a standard access list.

  B. Change sequence 10 in the route-map command from permit to deny.

  C. Use a prefix list instead of an access list in the route map.

  D. Add this statement to the route map: route-map RM-OSPF-DL deny 20.

  Correct Answer: D

• Question 838:

  Refer to the exhibit.

  

  Users in the branch network of 2001:db8:0:4::/64 report that they cannot access the Internet. Which command is issued in IPv6 router EIGRP 100 configuration mode to solve this issue?

  A. Issue the eigrp stub command on R1.

  B. Issue the no eigrp stub command on R1.

  C. Issue the eigrp stub command on R2.

  D. Issue the no eigrp stub command on R2.

  Correct Answer: B

  By observing the routing table we can determine that:

  1) the default static route isn't learned on the branch router

  2) R1 networks were learned. This concludes that on R1 we have eigrp stub connected which advertises only connected networks to Branch router.

• Question 839:

  Refer to the exhibit. Which configuration configures a policy on R1 to forward any traffic that is sourced from the 192.168.130.0/24 network to R2?

  

  A. access-list 1 permit 192.168.130.0 0.0.0.255 ! interface Gi0/2 ip policy route-map test ! route-map test permit 10 match ip address 1 set ip next-hop 172.20.20.2

  B. access-list 1 permit 192.168.130.0 0.0.0.255 ! interface Gi0/1 ip policy route-map test ! route-map test permit 10 match ip address 1 set ip next-hop 172.20.40.2

  C. access-list 1 permit 192.168.130.0 0.0.0.255 ! interface Gi0/2 ip policy route-map test ! r oute-map test permit 10 match ip address 1 set ip next-hop 172.20.20.1

  D. access-list 1 permit 192.168.130.0 0.0.0.255 ! interface Gi0/1 ip policy route-map test ! route-map test permit 10 match ip address 1 set ip next-hop 172.20.40.1

  E. access-list 1 permit 192.168.130.0 0.0.0.255 ! interface Gi0/1 ip policy route-map test ! route-map test permit 10 match ip address 1 set ip next-hop 172.20.20.1

  Correct Answer: D

• Question 840:

  R2 has a locally originated prefix 192.168.130.0/24 and has these configurations: What is the result when the route-map OUT command is applied toward an eBGP neighbor R1 (1.1.1.1) by using the neighbor 1.1.1.1 route-map OUT out command?

  

  A. R1 sees 192.168.130.0/24 as two AS hops away instead of one AS hop away.

  B. R1 does not accept any routes other than 192.168.130.0/24

  C. R1 does not forward traffic that is destined for 192.168.30.0/24

  D. Network 192.168.130.0/24 is not allowed in the R1 table

  Correct Answer: A