Implementing Cisco Service Provider VPN Services (300-515) Free Practice Test

Question 1

How does Layer 3 VPN traffic traverse an ISP network?

A. Devices on the network use MPLS labels to share VPN routes between P routers in the network.

B. Devices on the network use MPLS labels to move VPN traffic through the network.

C. Devices on the network use GRE tunnels to move traffic between VRFs.

D. Devices on the network use LSAs to share routes between P routers in the network.

Correct Answer: B

Question 2

What is the key difference between Layer 2 and Layer 3 VPNs?

A. Layer 2 VPNs extend a LAN across a service provider network, and Layer 3 VPNs allow for the separation of routing domains.

B. Layer 2 VPNs use GRE encapsulation, and Layer 3 VPNs use L2TP encapsulation.

C. Layer 2 VPNs allow for the routing of IP packets between sites, and Layer 3 VPNs provide a transparent Ethernet link between sites.

D. Layer 2 VPNs support only point-to-point connections, and Layer 3 VPNs support point-to- multipoint connections.

Correct Answer: A

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Question 3

Which routing requirement must be considered when OSPFv3 is implemented as the PE-CE routing protocol?

A. The CE and PE routers must establish an OSPF peering and an OSPFv3 peering.

B. MPLS must be configured on the link between the PE and CE.

C. The routes received from BGP must be statically entered on the CEs with the next hop set as the PE.

D. The routes received from OSPFv3 must be redistributes into BGP to allow connectivity between customer sites.

Correct Answer: D

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Question 4

Refer to the exhibit. A service provider implemented E-Tree for a customer, with PE1 serving as the root and PE2 and PE3 as leaf nodes in the topology. Each PE router is deployed in a different physical location. PE2 and PE3 cannot communicate with one another. Which action must the network engineer take to resolve the issue?

A. Configure dot1q encapsulation on the L2transport interface.

B. Configure different MAC addresses for MLACP.

C. Configure either PE2 or PE3 to be a root node.

D. Configure the ICCP group in singleton mode.

Correct Answer: C

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Question 5

An engineer needs to improve MPLS network management by implementing a set of tools to support the NOC engineers in troubleshooting network failures. Which feature should the engineer implement to check the connectivity of the MPLS LSP between the ingress and egress PE routers?

A. MPLS-TP

B. extended ping

C. LDP autodiscovery

D. MPLS OAM

Correct Answer: D

Question 6

What happens when Option AB is configured in an Inter-AS MPLS VPN?

A. A single PE-CE EBGP session per VRF is established between ASBRs in which each ASBR assumes that the other ASBR is a CE.

B. Two directly connected PE-ASBRs exchange VPNv4 prefixes and labels using MP-EBGP.

C. The route reflectors exchange customer VPNv4 prefixes over multihop MP-EBGP and VPNv4 prefixes with the next-hop unchanged.

D. A single MP-BGP session is established between ASBRs and exchanges VPNv4, IPv4, and MPLS labels.

Correct Answer: B

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Question 7

In MPLS Layer 3 VPN implementations, what is used on the PE router to isolate potential overlapping routing information between different customers?

A. VC IDs

B. VRFs

C. pseudowire IDs

D. route targets

E. pseudowire classes

Correct Answer: B

Question 8

Which utility can you use to validate an LSP in an MPLS environment?

A. uRPF

B. MPLS LSP ping

C. logging

D. RSVP

Correct Answer: B

Question 9

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 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.

B. 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.

C. The import-map command is applied under the PE interface that connects to the CE router.

D. A route must pass the import route map first and then the route target import filter.

Correct Answer: B

Question 10

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 E1 routes.

B. R1 redistributes BGP routes into the OSPF process of VRF custabc as OIA routes.

C. R1 mutually redistributes routes between BGP 65001 and the OSPF process of VRF custabc.

D. R1 redistributes BGP routes into the OSPF process of VRF custabc as E2 routes.

Correct Answer: A

Question 11

Refer to the exhibit. The engineering team of the service provider is implementing Ethernet OAM on the link between the PE and CE routers, and the team wants to set the upper OAM PDU threshold to 8. The CE router is configured with the default OAM configuration with passive mode enabled. Which configuration must the team implement to provide additional monitoring for the Ethernet connections to the customer's multiple sites?

A. ethernet oam
ethernet oam min-rate 8

B. ethernet oam
ethernet oam min-rate 8
ethernet oam mode passive

C. ethernet oam
ethernet oam max-rate 8
ethernet oam mode passive

D. ethernet oam
ethernet oam max-rate 8

Correct Answer: D

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Cisco Implementing Cisco Service Provider VPN Services (300-515) Free Practice Test