JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2023) — Question 94

You are using a Layer 3 VPN to connect two customer sites. The VPN routes for the customer networks appear as hidden in the bgp.l3vpn.0 routing table on the PE routers.
What is causing this problem?

Answer options

• A. The routes use overlapping IP addresses.
• B. There is a routing loop in the service provider backbone.
• C. There is not an established MPLS LSP between the two PE routers.
• D. Route targets are not configured.

Correct answer: C

Explanation

The correct answer is C because an established MPLS LSP is necessary for the Layer 3 VPN to function properly and for routes to be visible. Options A and B do not directly relate to the visibility of routes in the routing table, while D, while important for VPN functionality, is not the reason for the routes being hidden in this scenario.