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Juniper
JN0-664: Service Provider Routing and Switching, Professional Exam

Juniper JN0-664 Exam

Certification Provider: Juniper

Exam Name: Service Provider Routing and Switching, Professional Exam

Duration: 90 Minutes

Number of questions in our database: 65

Exam Version: Sep. 07, 2023

JN0-664 Exam Official Topics:

Topic 1: Designated router/backup designated router operation/ Metrics, including external metric types
Topic 2: Designated intermediate system (DIS) operation/ Describe the concepts, operation, or functionality of IS-IS
Topic 3: Full mesh versus hub-and-spoke topology/ Next-generation multicast virtual private networks (MVPNs)
Topic 4: Route summarization and route leaking/ Link-state advertisement (LSA) flooding through an OSPF multi-area network
Topic 5: Describe the concepts, operation, or functionality of EVPN/ Media access control (MAC) learning and distribution
Topic 6: Describe the concepts, operation, or functionality of BGP scaling mechanisms/ Given a scenario, demonstrate knowledge of how to configure or monitor BGP
Topic 7: Traffic flow?control and data planes/ Describe Junos OS support for carrier-of-carriers or inter-provider VPN models
Topic 8: Describe the concepts, operation, or functionality of OSPFv2 and OSPFv3/ Label-switched path (LSP) flooding through an IS-IS multi- area network
Topic 9: Given a scenario, demonstrate knowledge of how to configure or monitor single-area or multi-area OSPF/ Describe the concepts, operation, or functionality of BGP
Topic 10: Given a scenario, demonstrate knowledge of how to configure or monitor CoS/ Given a scenario, demonstrate knowledge of how to configure or monitor single-area or multi-area IS-IS

Free Juniper JN0-664 Exam Actual Questions

The questions for JN0-664 were last updated On Sep. 07, 2023

Question #1

When building an interprovider VPN, you notice on the PE router that you have hidden routes which are received from your BGP peer with family inet labeled-unica3t configured.

Which parameter must you configure to solve this problem?

AUnder the family inet labeled-unicast hierarchy, add the explicit null parameter.

BUnder the protocols ospf hierarchy, add the traffic-engineering parameter.

CUnder the family inet labeled-unicast hierarchy, add the resolve-vpn parameter.

DUnder the protocols mpls hierarchy, add the traffic-engineering parameter

Reveal Solution Hide Solution

Correct Answer: C

The resolve-vpn parameter is a BGP option that allows a router to resolve labeled VPN-IPv4 routes using unlabeled IPv4 routes received from another BGP peer with family inet labeled-unicast configured. This option enables interprovider VPNs without requiring MPLS labels between ASBRs or using VRF tables on ASBRs. In this scenario, you need to configure the resolve-vpn parameter under [edit protocols bgp group external family inet labeled-unicast] hierarchy level on both ASBRs.

Question #2

Exhibit

Referring to the exhibit, you are receiving the 192.168 0 0/16 route on both R3 and R4 from your EBGP neighbor You must ensure that R1 and R2 receive both BGP routes from the route reflector

In this scenario, which BGP feature should you configure to accomplish this behavior?

Aadd-path

Bmultihop

Cmultipath

Droute-target

Reveal Solution Hide Solution

Correct Answer: A

BGP add-path is a feature that allows the advertisement of multiple paths through the same peering session for the same prefix without the new paths implicitly replacing any previous paths. This behavior promotes path diversity and reduces multi-exit discriminator (MED) oscillations. BGP add-path is implemented by adding a path identifier to each path in the NLRI. The path identifier can be considered as something similar to a route distinguisher in VPNs, except that a path ID can apply to any address family.Path IDs are unique to a peering session and are generated for each network3. In this question, we have a route reflector (RR) that receives two routes for the same prefix (192.168.0.0/16) from an EBGP neighbor. By default, the RR will only advertise its best path to its clients (R1 and R2). However, we want R1 and R2 to receive both routes from the RR. To achieve this, we need to configure BGP add-path on the RR and enable it to send multiple paths for the same prefix to its clients.

Question #3

You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. In this scenario, which statement is correct?

AYou must assign a unique site number to each attached site's configuration.

BThis type of VPN only supports Ethernet interfaces when connecting to CE devices.

CThis type of VPN requires the support of the inet-vpn NLRI on all core BGP devices

DYou must use the same route-distinguiaher value on both PE devices.

Reveal Solution Hide Solution

Correct Answer: C

BGP signaled Layer 2 VPN is a type of VPN that uses BGP to distribute VPN labels and information for Layer 2 connectivity between sites over an MPLS network.BGP signaled Layer 2 VPN requires the support of the l2vpn NLRI on all core BGP devices1. The l2vpn NLRI is a new address family that carries Layer 2 VPN information such as the VPN identifier, the attachment circuit identifier, and the route distinguisher.The l2vpn NLRI is used for both auto-discovery and signaling of Layer 2 VPNs2. In this scenario, we are configuring a BGP signaled Layer 2 VPN across an MPLS enabled core network. Therefore, we need to ensure that all core BGP devices support the l2vpn NLRI.

Question #4

Exhibit

Referring to the exhibit, you are receiving the 192.168 0 0/16 route on both R3 and R4 from your EBGP neighbor You must ensure that R1 and R2 receive both BGP routes from the route reflector

In this scenario, which BGP feature should you configure to accomplish this behavior?

Aadd-path

Bmultihop

Cmultipath

Droute-target

Reveal Solution Hide Solution

Correct Answer: A

Question #5

You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. In this scenario, which statement is correct?

AYou must assign a unique site number to each attached site's configuration.

BThis type of VPN only supports Ethernet interfaces when connecting to CE devices.

CThis type of VPN requires the support of the inet-vpn NLRI on all core BGP devices

DYou must use the same route-distinguiaher value on both PE devices.

Reveal Solution Hide Solution

Correct Answer: C

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