In Multicast VPN (MVPN) implementations, which two of the following statements are regarding
the Default MDT Group? (Choose two).

A.
It is used for PIM control traffic.

B.
It is optionally configured for a high bandwidth multicast source to reduce multicast traffic
replication to uninterested PE routers.

C.
Within the VRF configuration in the PE router, multiple Default MDT groups are configured so
each VRF can support multiple multicast sources.

D.
There is a reduced multicast state in the MPLS core P routers.

E.
When multicast traffic exceeds a certain configured threshold, traffic from the Data MDT is
switched to the
Default MDT to conserve bandwidth.

Explanation:
MVPN supports two MDT types:
•Default MDT—The default MDT is a permanent channel for PIM control messages and lowbandwidth streams between all PE routers in a particular multicast domain. All multicast traffic in
the default MDT is replicated to every other PE router in the domain. Each PE router is logically

seen as a PIM neighbor (one hop away) from every other PE router in the domain.
•Data MDT—Data MDTs are optional. If enabled, they are dynamically created to provide optimal
paths for high-bandwidth transmissions, such as full-motion video, that do not need to be sent to
every PE router. This allows for on-demand forwarding of high-bandwidth traffic between PE
routers, so as to avoid flooding every PE router with every high-bandwidth stream that might be
created.