Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 369

How do PE routers operate with the MDT in a multicast VPN?

Answer options

• A. When the source PE router establishes adjacency using PIM SM mode in the default MDT, the receiving PE requests information about the source PE for BGP advertisement.
• B. The default MDT uses PIM sparse mode and PIM establishes adjacency over the shortest path tree toward the destination PE router.
• C. When the sending PE router recognizes that multicast data has exceeded the bandwidth threshold, it creates a data MDT and sends a UDP message to all routers using the default MDT.
• D. After the default MDT and BGP VPNv4 neighbor is configured, a different PE neighbor in the IPv6 MDT address family Is configured automatically for migrating to MDT SAFI.

Correct answer: C

Explanation

The correct answer is C because it accurately describes the procedure where the sending PE router creates a data MDT when bandwidth thresholds are exceeded. Option A misrepresents the role of PIM and BGP in this context, while option B incorrectly states how adjacency is established. Option D discusses neighbor configurations that are not directly relevant to the operation of the MDT with multicast data.