Juniper Exam JN0-664 Topic 8 Question 9 Discussion

Actual exam question for Juniper's JN0-664 exam

Question #: 9
Topic #: 8

You are a network architect for a service provider and want to offer Layer 2 services to your customers You want to use EVPN for Layer 2 services in your existing MPLS network.

Which two statements are correct in this scenario? (Choose two.)

ASegment routing must be configured on all PE routers.

BVXLAN must be configured on all PE routers.

CEVPN uses Type 2 routes to advertise MAC address and IP address pairs learned using ARP snooping

DEVPN uses Type 3 routes to join a multicast tree to flood traffic.

Show Suggested Answer

Suggested 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.

by Lavera at Jul 27, 2023, 06:43 AM

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Nieves

11 days ago

I wonder if the exam writer has ever actually configured EVPN in a real network. Probably not, or they wouldn't be asking such tricky questions!

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Vernice

12 days ago

Wait, does EVPN require me to be a mind reader to figure out the correct answers? I'll just go with my gut and pick C and D.

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Evangelina

14 days ago

Ah, segment routing isn't necessary for basic EVPN functionality. I'll steer clear of A. C and D sound like the right choices here.

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Irene

2 days ago

I agree, segment routing is not required for EVPN. Let's go with C and D.

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Lelia

29 days ago

Hmm, B seems like a trap answer. VXLAN is for encapsulating Layer 2 traffic, not a requirement for EVPN. I'll go with C and D.

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Ludivina

17 days ago

Segment routing is not required for EVPN, so A is not correct. VXLAN is not a must, so B is not needed.

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Florencia

19 days ago

D is also correct because EVPN uses Type 3 routes to flood traffic. Good choices!

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Salley

21 days ago

I agree, B is not necessary for EVPN. C is correct because EVPN uses Type 2 routes for MAC and IP address pairs.

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Octavio

1 months ago

C and D are correct. EVPN uses Type 2 routes for MAC/IP address learning and Type 3 routes for multicast forwarding. I'm glad I brushed up on my EVPN knowledge before the exam!

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