Multicast VPN Extranet Networking via Share-Group Merging
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Solution Overview
Problem
Current multicast VPN extranet networking solutions lead to excessive resource occupation and network load due to the need for multiple VPN instances and encapsulation/replication in public networks when receiving multicast data from multiple source VPNs.
Innovation Solution
Establishing a multicast tunnel and MTI connected to a source VPN multicast instance using a Share-Group address, allowing for encapsulated PIM protocol message forwarding and decapsulation to obtain multicast data, reducing the need for additional VPN instances and optimizing network traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple VPN instances are configured to receive multicast data from multiple source VPNs, then multicast data transfer capability is improved, but router system resource occupation increases excessively
Solution Approach 1:
The patent merges multiple source VPN Share-Group addresses into a single receiver VPN multicast instance. Instead of creating separate VPN instances for each source VPN, the solution allows one receiver VPN multicast instance to subscribe to multiple source VPNs by adding multiple Share-Group addresses to it. This combining approach maintains multicast data transfer capability from multiple sources while significantly reducing the number of VPN instances and associated system resources required.
Solution Approach 2:
The receiver VPN multicast instance is designed with multi-functionality to handle multicast data from multiple source VPNs simultaneously. By enabling a single instance to subscribe to multiple Share-Group addresses corresponding to different source VPNs, the instance performs multiple functions (receiving and forwarding multicast data from various sources) without requiring proportional increases in system resources.
2Adaptability or versatility
If multicast data is transferred through public network with encapsulation and replication, then multicast data transfer between remote VPNs is enabled, but network load increases excessively
Solution Approach 1:
The patent merges multiple encapsulated multicast data streams into a single public network multicast stream. By combining the Share-Group addresses of multiple source VPNs into one receiver VPN multicast instance, the solution enables single-stream encapsulation and transmission over the public network, eliminating the need for multiple separate encapsulation and replication operations that would otherwise increase network load.
3Adaptability or versatility
If additional VPN instances are configured for extranet networking, then multicast VPN extranet functionality is improved, but device complexity increases
Solution Approach 1:
The patent merges the functionality of multiple source VPN subscriptions into a single receiver VPN multicast instance configuration. Instead of configuring separate VPN instances for each source VPN, the solution allows administrators to add multiple Share-Group addresses to one instance, significantly simplifying the configuration process and reducing device complexity while maintaining full extranet multicast functionality.
Data Source
AI summary
A method, a system, and an apparatus for extranet networking of a multicast Virtual Private Network (VPN) are disclosed in the present invention. The method includes: establishing a multicast tunnel to a source VPN multicast instance and a multicast tunnel interface (MTI) connected to the multicast tunnel according to an added Share-Group address of a source VPN; sending an encapsulated Protocol Independent Multicast (PIM) protocol message to the MTI, forwarding the encapsulated PIM protocol message in a public network, and making the source VPN multicast instance generate a public network multicast data message of a Share-Group of the source VPN according to the encapsulated PIM protocol message; and decapsulating the received public network multicast data message of the Share-Group of the source VPN, and obtaining multicast data from the source VPN multicast instance. The present invention reduces the resource occupation of a router system, and alleviates the network load.