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Juniper JN0-664 Exam - Topic 3 Question 7 Discussion

You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. In this scenario, which statement is correct?
C) This type of VPN requires the support of the inet-vpn NLRI on all core BGP devices
A) You must assign a unique site number to each attached site's configuration.
B) This type of VPN only supports Ethernet interfaces when connecting to CE devices.
D) You must use the same route-distinguiaher value on both PE devices.

Juniper JN0-664 Exam - Topic 3 Question 7 Discussion

Actual exam question for Juniper's JN0-664 exam
Question #: 7
Topic #: 3
[All JN0-664 Questions]

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

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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 Erick at May 26, 2023, 08:46 AM

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Maile
9 months ago
Wait, are we sure about C? Sounds a bit off to me.
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Clay
9 months ago
I disagree with B, it can support more than just Ethernet.
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Yoko
10 months ago
A unique site number? That's new to me!
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Kristin
10 months ago
I thought D was correct, same route-distinguisher makes sense.
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Nichelle
10 months ago
C is definitely the right answer. inet-vpn NLRI is a must!
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Nakita
10 months ago
I recall that Ethernet interfaces are commonly used, but I’m not sure if that’s the only option for CE devices in this scenario.
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Scot
10 months ago
I’m a bit confused about the route-distinguisher values. Do they really need to be the same on both PE devices? That seems off.
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Refugia
11 months ago
I feel like I saw a question similar to this in practice, and it was about the inet-vpn NLRI being necessary for BGP in MPLS networks.
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Colby
11 months ago
I think I remember something about needing unique site numbers for each site configuration, but I'm not entirely sure if that's always the case.
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Mohammad
11 months ago
I'm a little confused on the difference between the options here. Do I need to include permissions and access settings, or is that not necessary? I'll have to review my notes to make sure I understand this properly.
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Laurel
11 months ago
This question seems a bit tricky. There are a lot of moving parts to the cycle counting process, and I want to make sure I don't overlook anything. I'll need to carefully read through the requirements and think through all the different elements that need to be considered.
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Lavonna
11 months ago
Hmm, this seems like a straightforward question about the legal foundations of estates and trusts. I'm pretty confident I can work through this.
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