EVPN Route Advertisement for Mixed-Model Service Interworking
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Solution Overview
Problem
In mixed deployment scenarios of Ethernet virtual private network (EVPN) models, where Interface-less and Interface-ful models are combined, network devices fail to generate valid routing tables, leading to unreliable service interworking and complex network configuration due to the inability of devices supporting one model to interpret routes intended for the other.
Innovation Solution
A method where a first network device advertises an EVPN IP Prefix route and MAC/IP route, including a gateway IP address and MPLS label, ensuring compatibility across different models, allowing service interworking without requiring multiple route reflectors (RRs) and simplifying network planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the Interface-less Model and Interface-ful Model are deployed in a mixed manner, then network flexibility and adaptability are improved, but service reliability deteriorates due to incompatible route advertisement mechanisms
Solution Approach 1:
The patent changes the parameters of route advertisement by introducing a unified route format that includes both gateway IP address and MPLS label. This parameter modification allows routes to be properly interpreted by both Interface-less and Interface-ful models, resolving the compatibility issue while maintaining service reliability
Solution Approach 2:
The patent creates a universal route advertisement mechanism that serves both Interface-less and Interface-ful models simultaneously. The unified route format with gateway IP and MPLS label can be processed by devices supporting either model, achieving multi-functionality and eliminating the need for separate advertisement mechanisms
2Manufacturing precision
If separate route advertisement mechanisms are used for Interface-less and Interface-ful models, then model-specific optimization is improved, but device complexity increases due to multiple route reflector requirements
Solution Approach 1:
The patent merges the separate route advertisement mechanisms for Interface-less and Interface-ful models into a single unified mechanism. By combining both models' requirements into one route format with gateway IP and MPLS label, the patent eliminates the need for multiple route reflectors and reduces device complexity while maintaining model-specific optimization
Data Source
AI summary
A route advertisement method includes advertising, by a first network device, an Internet Protocol (IP) prefix route to a second network device, where the IP Prefix route includes a gateway (GW) IP address and a Multi-Protocol Label Switching (MPLS) label. The GW IP address is an IP address of a first interface of the first network device. The MPLS Label is a label of a first IP-virtual routing and forwarding (IP-VRF) instance of the first network device. The first network device advertises a media access control (MAC)/IP route to the second network device, where the MAC/IP route includes the IP address of the first interface and a MAC address of the first interface.