300-410 practice questions 561–570

1. Question 561 · 578 in bank

   

   Refer to the exhibit. Which command must be configured to make VRF CCNP work?

   • Ainterface Loopback0 ip address 10.1.1.1 255.255.255.0 vrf forwarding CCNP
   • Binterface Loopback0 ip address 10.1.1.1 255.255.255.0
   • Cinterface Loopback0 vrf forwarding CCNP
   • Dinterface Loopback0 ip address 10.1.1.1 255.255.255.0 ip vrf forwarding CCNP

   Show answer

   Answer: B

   Explanation

   Just put the IP back to the interface and you're good. R1(config)#ip vrf CCNP R1(config-vrf)#rd 1:100 R1(config-vrf)#exit R1(config)#int lo 0 R1(config-if)# R1(config-if)#ip address 10.1.1.1 255.255.255.0 R1(config-if)#ip vrf forwarding CCNP % Interface Loopback0 IPv4 disabled and address(es) removed due to disabling VRF CCNP R1(config-if)#exit R1(config)#do show run int lo 0 Building configuration... Current configuration : 66 bytes ! interface Loopback0 ip vrf forwarding CCNP no ip address end

   Source: Adapted from community discussion — Brand

   Next question

2. Question 562 · 578 in bank

   

   Refer to the exhibits. An engineer investigates a routing issue on R1 and finds that traffic destined to 5.5.5.0/24 does not take all of the paths.

   

   Which action resolves the issue?

   • AIncrease the variance value in EIGRP.
   • BDecrease the variance value in EIGRP.
   • CRemove the adjacency of R3 from EIGRP.
   • DStop advertising 192.168.13.0/24 in EIGRP.

   Show answer

   Answer: A

   Explanation

   Reference: https://community.cisco.com/t5/networking-documents/troubleshooting-eigrp-variance-command/ta-p/3129662#:~:text=EIGRP%20provides%20a% 20mechanism%20to,means%20equal%2Dcost%20load%20balancing

   Next question

3. Question 563 · 578 in bank

   DRAG DROP - Drag and drop the MPLS VPN concepts from the left onto the correct descriptions on the right. Select and Place:

   

   This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.

   Show the answer figure

   Answer: See figure below

   Explanation

   Route distinguisher - Uniquely identifies a customer prefix; Route Target - Controls the import/export of customer prefixes; Resource Reservation Protocol - Distributes labels for traffic engineering; Multi-Protocol BGP - Propagates VPN reachability information.

   Source: Adapted from community discussion — Dave513

   

   Next question

4. Question 564 · 578 in bank

   Select 2

   

   Refer to the exhibits. Phase-3 tunnels cannot be established between spoke-to-spoke in DMVPN. Which two commands are missing? (Choose two.)

   • AThe ip nhrp redirect command is missing on the spoke routers.
   • BThe ip nhrp shortcut command is missing on the spoke routers.
   • CThe ip nhrp redirect command is missing on the hub router.
   • DThe ip nhrp shortcut command is missing on the hub router.
   • EThe ip nhrp map command is missing on the hub router.

   Show answer

   Answer: BC

   Explanation

   Well, it's a really complicate question. For me, it's missing 3 commands. The "ip nghrp map multicast dynamic" and "ip nhrp redirect" in the hub. And the IP nhrp shortcut in the spokes. In a lab, the DMVPN Phase wouldn't work without theses 3 commands. BC seems correct, but without E it wouldn't work. It's complicated.

   Source: Adapted from community discussion — Malasxd

   Next question

5. Question 565 · 578 in bank

   Which protocol is used to determine the NBMA address on the other end of a tunnel when mGRE is used?

   • ANHRP
   • BIPsec
   • CMP-BGP
   • DOSPF

   Show answer

   Answer: A

   Explanation

   Next Hop Resolution Protocol (NHRP) is a resolution protocol that allows a Next Hop Client (NHC) to dynamically register with Next Hop Servers (NHSs). With the Dynamic Multipoint Virtual Private Network (DMVPN) design, the NHC is the spoke router, and the NHS is the hub route

   Source: Adapted from community discussion — asd23355

   Next question

6. Question 566 · 578 in bank

   A DMVPN single hub topology is using IPsec + mGRE with OSPF. What should be configured on the hub to ensure it will be the designated router?

   • Aroute map to set the metrics of learned routes to 110
   • Btunnel interface of the hub with ip nhrp ospf dr
   • COSPF priority to 0
   • DOSPF priority greater than 1

   Show answer

   Answer: D

   Explanation

   In a DMVPN (Dynamic Multipoint Virtual Private Network) single hub topology with OSPF, to ensure that the hub router becomes the designated router (DR) for the OSPF network, you need to configure the OSPF priority of the hub router to be greater than 0. OSPF uses the priority value to determine which router becomes the DR. The router with the highest priority becomes the DR. So, the correct option is: D. OSPF priority greater than 1 Setting the OSPF priority to a value greater than 1 will increase the likelihood of the hub router becoming the designated router in the OSPF network. Typically, setting the priority to 1 means the router is not eligible to become the DR, so it should be set to a value greater than 1 to become the DR.

   Source: Adapted from community discussion — chris110

   Next question

7. Question 567 · 578 in bank

   Select 2

   What are two purposes of using IPv4 and VPNv4 address-family configurations in a Layer 3 MPLS VPN? (Choose two.)

   • ARD is prepended to the IPv4 route to make it unique.
   • BThe VPNv4 address consists of a 64-bit route distinguisher that is prepended to the IPv4 prefix.
   • CMP-BGP is used to allow overlapping IPv4 addresses between customers to advertise through the network.
   • DThe IPv4 address is needed to tag the MPLS label.
   • EThe VPNv4 address is used to advertise the MPLS VPN label.

   Show answer

   Answer: AE

   Explanation

   A: -64-bit RD prepended to IPv4 prefix to make customer routes unique = VPNv4 address https://community.cisco.com/t5/switching/i-am-not-clear-on-the-difference-between-ipv4-and-vpnv4-address/td-p/2463679 E: The VPN label is advertised to all other PE routers in an MP-BGP update. https://www.ccexpert.us/mpls/vpn-label-propagation.html

   Source: Adapted from community discussion — HungarianDish_111

   References

   • cisco.com documentation
   • cisco.com documentation
   • RFC Editor

   Next question

8. Question 568 · 578 in bank

   Select 2

   What are two functions of MPLS Layer 3 VPNs? (Choose two.)

   • AIt is used for transparent point-to-multipoint connectivity between Ethernet links/sites.
   • BA packet with node segment ID is forwarded along with shortest path to destination.
   • CCustomer traffic is encapsulated in a VPN label when it is forwarded in MPLS network.
   • DBGP is used for signaling customer VPNv4 routes between PE nodes.
   • ELDP and BGP can be used for Pseudowire signaling.

   Show answer

   Answer: CD

   References

   • Cisco documentation

   Next question

9. Question 569 · 578 in bank

   What is a prerequisite for configuring BFD?

   • AJumbo frame support must be configured on the router that is using BFD.
   • BAll routers in the path between two BFD endpoints must have BFD enabled.
   • CCisco Express Forwarding must be enabled on all participating BFD endpoints.
   • DTo use BFD with BGP, the timers 3 9 command must first be configured in the BGP routing process.

   Show answer

   Answer: C

   Explanation

   Prerequisites for Bidirectional Forwarding Detection •Cisco Express Forwarding (CEF) and IP routing must be enabled on all participating routers. https://www.cisco.com/en/US/docs/ios/12_4t/ip_route/configuration/guide/t_bfd.html#wp1043332

   Source: Adapted from community discussion — Girmiti

   References

   • Cisco documentation
   • Cisco documentation

   Next question

10. Question 570 · 578 in bank

    Select 2

    What are two MPLS label characteristics? (Choose two.)

    • AThe label edge router swaps labels on the received packets.
    • BLabels are imposed in packets after the Layer 3 header.
    • CLDP uses TCP for reliable delivery of information.
    • DAn MPLS label is a short identifier that identifies a forwarding equivalence class.
    • EA maximum of two labels can be imposed on an MPLS packet.

    Show answer

    Answer: CD

    Explanation

    A. The label edge router swaps labels on the received packets. >> not true, edge routers add or remove labels B. Labels are imposed in packets after the Layer 3 header. >> not true, labels are imposed after L2 and before L3 C. LDP uses TCP for reliable delivery of information. >> OK D. An MPLS label is a short identifier that identifies a forwarding equivalence class. >> OK E. A maximum of two labels can be imposed on an MPLS packet. >> seems not true, "All IPv4 packets have one or more labels." - more info https://www.ciscopress.com/articles/article.asp?p=680824&seqNum=5

    Source: Adapted from community discussion — Pietjeplukgeluk

    Next question

Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page

300-410 practice, question 561. 578 questions available.