VPLS to VPWS Instance Association for MAC Learning Reduction
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Solution Overview
Problem
In Ethernet Virtual Private Networks (EVPN), the pressure on Provider Edge (PE) devices to learn Media Access Control (MAC) addresses is high, leading to complex MAC entries and potential performance issues in packet forwarding due to the inability of EVPN signaling to support Virtual Leased Line Pseudo Wires (VLL PW).
Innovation Solution
A packet transmission method and system that associates Virtual Private LAN Service (VPLS) instances with Virtual Private Wire Service (VPWS) instances, allowing packet forwarding without learning MAC addresses, by using association relationships and routing tables to determine the correct VPWS instance for forwarding packets between PE devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If EVPN signaling is used for packet forwarding, then network adaptability is improved, but device complexity increases due to MAC address learning requirements
Solution Approach 1:
The patent introduces an intermediary mechanism by binding VPLS instances to VPWS instances through association relationships. This binding acts as a mediator that enables packet forwarding without requiring PE devices to learn MAC addresses, thus reducing device complexity while maintaining network adaptability through the flexible instance association model
2Measurement precision
If MAC address learning is implemented in PE devices, then packet forwarding accuracy is improved, but processing time increases due to complex MAC entry management
Solution Approach 1:
The patent applies preliminary action by pre-establishing binding relationships between VPLS and VPWS instances before packet forwarding is needed. This pre-configuration allows packets to be forwarded directly through the established associations without requiring real-time MAC address learning and lookup, thereby reducing processing time while maintaining forwarding accuracy
Data Source
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AI summary
A packet transmission method, device, and system are disclosed, and pertain to the field of network technologies. The system includes a first network device in a VPLS network and a second network device in a VPWS network. The first network device receives, by using a first VPLS instance in the first network device, a packet to be sent to a user-side device connected to the second network device, determines a first VPWS instance in the first network device based on an association relationship between the first VPLS instance and the first VPWS instance, and forwards the packet to a second VPWS instance in the second network device by using the first VPWS instance. A VPLS instance is associated with a VPWS instance in the first network device, so that a packet that is received by using the VPLS instance and that is to be sent to a user-side device can be forwarded by using the associated VPWS instance, pressure on the first network device to learn a MAC address for packet transmission is reduced, and forwarding performance of the system is ensured.