[Aug-2021] 300-515 Pre-Exam Practice Tests | Exam Questions and Answers for CCNP Service Provider Study Guide
Implementing Cisco Service Provider VPN Services Certification Sample Questions
NEW QUESTION 35
With Layer 3 MPLS VPN implementations on Cisco IOS XR PE routers, an interface is assigned to a VRF using the vrf command in which configuration mode?
- A. RP/0/RP0/CPU0:PE(config-bgp)#
- B. RP/0/RP0/CPU0:PE(config-bgp-af)#
- C. RP/0/RP0/CPU0:PE(config-vrf)#
- D. RP/0/RP0/CPU0:PE(config-if)#
Answer: D
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/ios_xr_sw/iosxr_r3-7/mpls/configuration/guide/gc37v3.html
NEW QUESTION 36
An ISP provides a major client MPLS VPN for managed services. The MPLS engineering team needs to use the advanced VPN feature of selective VRF import so that only specific prefixes are present in the required VPNs.
Which aspect of this feature must the team consider?
- A. The import-map command is applied under the PE interface that connects to the CE router.
- B. The routers that are imported in the VRF can be BGP and IGP routes, so other match conditions in the route map, besides communities, can be used.
- C. A route must pass the import route map first and then the route target import filter.
- D. A route is imported into the VRF only when at least one RT that is attached to the route matches one RT that is configured in the VRF and the route is permitted by the import route map.
Answer: D
Explanation:
Reference: https://www.ccexpert.us/mpls/configuring-selective-vrf-import.html
NEW QUESTION 37
An engineer noticed that PE3 is failing to accept IPv6 traffic information from PE1 The engineer confirmed that both PE3 and PE1 routers are configured accurately with IPv6 protocol To eliminate IPv6 traffic loss issue, which action must the engineer take to solve the problem?
- A. Configure 6PE forwarding between 6PE routers based on the IPv6 header
- B. Disable 6PVE that provides local IPv6 reachability over MPLS.
- C. Allow PE routers use the MP-iBGP extensions in the IPv6 network configuration to exchange IPv6 reachability information.
- D. Configure 6PE that provides global IPv6 reachability over IPv4 MPLS
Answer: D
NEW QUESTION 38
An engineer is troubleshooting AToM on an IOS XE router and receives an error when creating the xconnect. Which command does he need to complete to create the xconnect in AToM?
- A. encapsulation 12tpv3
- B. encapsulation mpls
- C. protocol none
- D. protocol 12tpv3
Answer: B
NEW QUESTION 39
While implementing Layer 3 MPLS VPN, which feature should an engineer use at the PEs to transform the customer IPv4 prefixes into a unique 96-bit prefix?
- A. PW ID
- B. VC ID
- C. RD
- D. RT
Answer: C
NEW QUESTION 40
Which condition must be met before an environment can support CSC?
- A. The CSC-PE and CSC-CE must each be able to ping an interface in its respective global routing table.
- B. The CSC-PE and the CSC-CE must support IPv6.
- C. The CSC-CE must support OSPFv3.
- D. The CSC-PE and CSC-CE devices must be able to send labels to one another using BGP.
Answer: D
NEW QUESTION 41
Refer to the exhibit.
A technician is troubleshooting a connectivity issue and notices that there is no IS-IS adjacency between R1 and R2. What can the technician change to bring the IS-IS adjacency up?
- A. Change R2's configuration to no longer set the overload bit.
- B. Change R1's net address to be in the same area as R2.
- C. Change R2's net address to be in the same area as R1.
- D. Change R1's is-type to level-2-only
Answer: D
NEW QUESTION 42
Drag and drop the EVPN components from the left onto the correct planes on the right.
Answer:
Explanation:
Reference:
https://www.cisco.com/c/dam/m/en_us/network-intelligence/service-provider/digital-transformation/knowledge-network-webinars/pdfs/0420-epn-ckn.pdf
NEW QUESTION 43
What is a requirement to share VRF reachability information to all members of a VPN when using IPv6?
- A. All PEs must have the same VRFs configured.
- B. PE and CE routers must be running BGP as the PE-CE routing protocol
- C. PE routers must have MPLS disabled and be running MP-BGP between all P and PE routers.
- D. PE routers must be running MP-BGP and bgp default ipv4-unicast must be disabled
Answer: A
NEW QUESTION 44
Which two BGP attributes prevent loops in a route reflector environment? (Choose two.)
- A. AS_PATH
- B. originator ID
- C. cluster ID
- D. origin
- E. local preference
Answer: B,C
Explanation:
Reference: https://www.ciscopress.com/articles/article.asp?p=2756480&seqNum=10
NEW QUESTION 45
Refer to the exhibit.
The CE router has established a BGP peering with the PE router, and the CE will use the core infrastructure of the PE as a backbone carrier to support CSC. Which additional task can you perform to complete the configuration?
- A. Configure the address-family ipv4 labeled-unicast command under the neighbor configuration of the CE router for the PE.
- B. Configure OSPF on the PE router.
- C. Configure static routing on the CE router.
- D. Change the rd value to 65001:65001 under the VRF section of the PE router.
Answer: B
NEW QUESTION 46
Which two statements describe primary differences between MPLS Layer 2 and Layer 3 VPNs? (Choose two.)
- A. Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use L2TPv3 tunneling.
- B. Layer 2 VPNs use BGP, but Layer 3 VPNs use VPLS.
- C. Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use pseudowires to provide tunneling.
- D. Layer 2 VPNs use L2TPv3 tunneling, but Layer 3 VPNs use GRE tunneling.
- E. Layer 2 VPNs use AToM, but Layer 3 VPNs use MPLS/BGP.
Answer: D,E
NEW QUESTION 47
Refer to the exhibit.
Which statement describes the result of this configuration?
- A. R1 redistributes BGP routes into the OSPF process of VRF custabc as OIA routes.
- B. R1 mutually redistributes routes between BGP 65001 and the OSPF process of VRF custabc.
- C. R1 redistributes BGP routes into the OSPF process of VRF custabc as E2 routes.
- D. R1 redistributes BGP routes into the OSPF process of VRF custabc as E1 routes.
Answer: D
NEW QUESTION 48
Which tool identifies the point of failure in a P2MP LSP from the ingress LSR?
- A. P2MP traceroute
- B. P2MP ping
- C. Jitter TLV
- D. SPAN
Answer: A
Explanation:
Reference: https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r5-3/mpls/configuration/ guide/b-mpls-cg53x-asr9k/b-mpls-cg53x-asr9k_chapter_01000.html
NEW QUESTION 49
An engineer is investigating an EVPN traffic flow issue. Which type of traffic should the engineer allow in an EVPN Tree Service in order to fix this issue?
- A. known unicast from a leaf to another leaf
- B. multicast from a leaf to another leaf
- C. unknown unicast from a leaf to another leaf
- D. known unicast from a root to another root
Answer: D
Explanation:
Reference: https://tools.ietf.org/html/draft-ietf-bess-evpn-etree-14
NEW QUESTION 50
Refer to the exhibit.
If the two devices are operating normally, which two conclusions can you draw from this configuration?
(Choose two.)
- A. The PE-CE routes between the devices are being exchanged by OSPF
- B. CE1 must use OSPF to establish a neighbor relationship with PE1.
- C. PE1 labels the routes it learns from CE1 with the route-target 222:2 and shares them with its VPNv4 peers.
- D. CE1 is supporting CSC.
- E. PE1 labels the routes it learns from CE1 with the route-target 111:1 and shares them with its VPNv4 peers.
Answer: A,B
NEW QUESTION 51
What is the primary function of a VRF on a router?
- A. It enables the router to support multiple separate routing tables, which allows the device to handle overlapping IP addresses.
- B. It enables a router to configure VLANs locally, which provides segregation between networks.
- C. It enables a router to run BGP and a distance vector routing protocol at the same time, which allows it to serve as a VPN endpoint between remote sites.
- D. It enables the router to provide faster switching through the network by using labels to identify the input and output interfaces for neighbor routers.
Answer: A
Explanation:
Section: VPN Architecture
NEW QUESTION 52
An engineer is troubleshooting an EoMPLS circuit on a Cisco IOS XR router interface that removes a VLAN
- A. interface GigabitEthernet 0/10.l2transport
encapsulation dot1q 10
rewrite ingress tag pop 1 symmetric
l2vpn
xconnect group 103588
p2p 103588
interface GigabitEthernet 0/10.10
neighbor ipv4 10.10.10.2 pw-id 103588 - B. interface GigabitEthernet 0/10.10
encapsulation dot1q 10
rewrite ingress tag pop 1 symmetric
l2vpn
xconnect group 103588
p2p 103588
interface GigabitEthernet 0/10.10
neighbor ipv4 10.10.10.2 pw-id 103588 - C. interface GigabitEthernet 0/10.10 l2transport
encapsulation dot1q 10
rewrite ingress tag translate 1-to-1 dot1ad 10
symmetric
l2vpn
xconnect group 103588
p2p 103588
interface GigabitEthernet 0/10.10
neighbor ipv4 10.10.10.2 pw-id 103588 - D. interface GigabitEthernet 0/10.10 l2transport
encapsulation dot1q 10
l2vpn
xconnect group 103588
p2p 103588
interface GigabitEthernet 2/10.10
neighbor ipv4 10.10.10.2 pw-id 103588
Answer: D
NEW QUESTION 53 
Drag and drop the EVC configuration items from the left onto the correct descriptions on the right.
Answer:
Explanation:
Explanation
NEW QUESTION 54
Refer to the exhibit.
Which statement about this output is true?
- A. The adjacent router is the egress LSR and has mpls ldp explicit-null configured.
- B. The adjacent LSR router configured mpls label range 0.
- C. The router IP 192.168.1.2 sent an implicit null, and the output is from the penultimate LSR.
- D. The zero in the second column is the normal behavior of an egress router LSR.
Answer: A
NEW QUESTION 55
Refer to the exhibit.
A network operator is implementing EVPN IRB on PE1. Which two command placements enable the advertisement of Type 2 routes and what information do Type 2 routes contain? (Choose two.)
- A. Type 2 routes contain inclusive source-specific multicast route information.
- B. Type 2 routes contain MAC/IP information.
- C. The operator adds in "host-routing" under the BVI651 interface.
- D. The operator adds in "host-routing" under the VRF EVPN.
- E. Type 2 routes contain Ethernet Auto-Discovery information.
Answer: B,C
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/vpn/61x/b-ncs5500-l2vpn-configuration- guide-61x/b-ncs5500-l2vpn-configuration-guide-61x_chapter_01010.html
NEW QUESTION 56
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