Case Study 1: Implementing Multicast Support for MPLS VPNs
Multicast VPN or an MPLS VPN capable of supporting multicast packet forwarding does not use MPLS forwarding or a control mechanism but uses MPLS VPN architecture and its associated Multicast Border Gateway Protocol (MBGP) route distribution process. This architecture requires that multicast routing be enabled in the SP core network. The multicast VPN solution provides a reduction in the amount of state information while retaining optimal routing. It maps all the particular VPN multicast groups to a single unique group called the Default Multicast Distribution Tree (Default MDT) in the provider network.
Control and low bandwidth data traffic flows through the default MDT. The solution ...
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