Dual Domain Virtual Private Network for VoIP Reliability
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Solution Overview
Problem
The increasing global expansion of businesses necessitates reliable and secure communication networks for VoIP and SoIP services, as public Internet networks are unreliable and insecure, while leased lines are costly and not scalable for multiple interconnected sites.
Innovation Solution
A method and apparatus providing a reliable wide area network infrastructure by creating virtual private networks in both public and private domains, using Border Gateway Protocol (BGP) control planes to interconnect customer edge routers with provider edge routers, ensuring redundancy and load sharing across multiple VPNs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If public Internet networks are used for VoIP and SoIP services, then cost is reduced, but reliability and security deteriorate
Solution Approach 1:
The network is segmented into multiple independent VPN instances (first VPN and second VPN) that operate separately but provide complementary functionality. Each VPN instance handles routing independently, so failure in one does not affect the other, thereby maintaining reliability while using cost-effective public Internet infrastructure.
Solution Approach 2:
The system changes the operational parameters by implementing dual independent control planes with separate BGP routing instances. This parameter change allows the network to achieve enterprise-grade reliability through redundancy and load sharing, transforming the public Internet into a reliable communication infrastructure.
2Reliability
If leased lines are used for network connectivity, then reliability and security are improved, but cost increases prohibitively for multiple interconnected sites
Solution Approach 1:
The invention creates virtual copies of private network functionality through multiple VPN instances on the public Internet. Instead of physically leasing separate lines for each site connection, the system copies routing and control plane functionality across multiple virtual instances, achieving leased-line reliability at public-network cost.
Solution Approach 2:
The dual VPN architecture provides multi-functionality by simultaneously offering reliable communication, security, and cost-effectiveness. The system universally applies BGP routing and load sharing across both VPN instances, making the public Internet infrastructure as versatile and reliable as traditional leased lines for multiple interconnected sites.
3Device complexity
If single VPN architecture is used, then device complexity is reduced, but reliability deteriorates due to lack of redundancy
Solution Approach 1:
The system implements dynamic load sharing and failover capabilities where traffic can be distributed across multiple VPN instances based on current network conditions. The control planes dynamically exchange routing information and can shift traffic loads, providing adaptability and reliability without requiring complex manual configuration or management.
Data Source
AI summary
A method and apparatus for providing a wide area network infrastructure for providing services on IP networks such as Voice over Internet Protocol (VoIP) and Service over Internet Protocol (SoIP) networks are disclosed. For example, an enterprise customer may subscribe to a service for obtaining a reliable wide area network infrastructure for communicating among two or more customer locations. The network service provider creates a virtual private network in the public domain and another virtual private network in the private domain to interconnect the customer locations. It then connects each customer edge router to two provider edge routers one in each domain and/or instances of provider edge functionality in each domain. Routes are then advertised via two control planes to both virtual private networks.