MPLS-Enabled Applications: Emerging Developments and New Technologies

10.10. STUDY QUESTIONS

1. What are the various options for setting up MDTs in the service provider network in the draft-rosen proposal and how do these map to different PIM modes? Compare the state created in the provider's network in each of these cases to the state that is created by LSPs in an L3VPN unicast deployment.

2. What could be some of the reasons why the increase in the bandwidth used by multicast traffic was one of the drivers for moving away from the draft-rosen solution?

3. The benefits of using RSVP-TE P2MP LSPs for the transport tunnels in the provider network were discussed in Section 10.5.3. What would be some of the advantages of some of the other technologies for instantiating transport tunnels?

4. Aggregation of traffic from multiple VPNs onto a shared distribution tree relies on identifying the VPN to which the traffic belongs through the use of an upstream-allocated label. What restrictions does this model place on the types of transport tunnels that can be used in the provider network?

5. The MCAST-VPN NLRI does not have support for prune routes, only for join routes (see [BGP-mVPN-ENC]). What is the reason for this decision?

6. What is the use of the C-multicast Import RT and why does it require changes to the unicast advertisement of the route for the source?

7. If the P2MP tree from PE1 to PE2 and PE3 in Figure 10.5 was set up using P2MP LDP rather than P2MP RSVP-TE, then routers PE2 and PE3 need not have sent autodiscovery routes. How would the tunnel have been set up in that ...