Configuring mLDP In-Band MVPN

mLDP in-band MVPN allows IP multicast services to run on a BGP/MPLS IP VPN, ensuring reliability, security, and efficiency of IP multicast services.

Usage Scenario

Multicast services, such as IPTV, multimedia conferencing, and real-time multiplayer online games, continue to grow in popularity. Transmission of these services has the following requirements on the service bearer network:

Multicast traffic can be forwarded smoothly, even during traffic congestion.
Network faults can be detected in time, and traffic can be switched to a backup path immediately upon fault detection.
Multicast traffic security can be ensured in real time.

To solve multicast service issues related to traffic congestion, reliability, and security, you can deploy mLDP in-band MVPN on the service provider's backbone network. Figure 1 shows the typical networking of mLDP in-band MVPN.

Figure 1 Typical networking of mLDP in-band MVPN

Pre-configuration Tasks

Before configuring mLDP in-band MVPN, complete the following tasks:

Configure a basic BGP/MPLS IP VPN to ensure that the unicast VPN works properly and unicast routes between the sender PE and receiver PEs are reachable.
Configure an automatic mLDP P2MP tunnel on the root and leaf nodes.

Configuring Multicast Traffic Transmission over P2MP Tunnels: mLDP in-band MVPN uses mLDP P2MP tunnels to carry multicast traffic.

Configuring PIM: Configuring PIM on a VPN allows a VPN multicast routing table to be established to guide multicast traffic forwarding.

(Optional) Configuring IGMP: Configuring IGMP on the interfaces connecting a multicast device to a user network segment allows the device to manage multicast group members on that network segment.

Verifying the Configuration: After configuring mLDP in-band MVPN, check the BGP unicast peer relationships, unicast routes, and PIM routing tables of VPN instances on a PE.