Container FEC for MPLS Route Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing MPLS LSP forwarding mechanisms struggle to establish end-to-end connections after route aggregation due to inconsistencies between FEC aggregation and route aggregation strategies, requiring complex configurations and leading to inter-domain leakage issues.
Innovation Solution
The introduction of a container FEC concept, where a container flag is marked in ILM and FTN table entries, allowing for label swapping and forwarding based on aggregated routes, simplifying the establishment of end-to-end LSPs without complex FEC advertising strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If FEC aggregation strategy is implemented, then label assignment is simplified, but end-to-end LSP establishment becomes problematic after route aggregation
Solution Approach 1:
The patent introduces a container FEC as an intermediary mechanism between the aggregated route and the detailed FEC. The container FEC acts as a mediator that carries the detailed FEC information, allowing the MPLS label to be assigned to the aggregated route while still maintaining the ability to establish end-to-end LSPs for detailed FECs. This resolves the contradiction by enabling both simplified label assignment and reliable LSP establishment.
Solution Approach 2:
The patent segments the FEC into two parts: the container FEC (aggregated route) and the detailed FEC (specific destination). This segmentation allows the label to be assigned at the aggregated level for simplicity, while the detailed FEC information is preserved within the container FEC to enable proper LSP establishment. The container FEC serves as a container that holds the detailed FEC, separating the labeling function from the forwarding function.
2Productivity
If route aggregation is implemented, then IP forwarding efficiency is improved, but IGP inter-domain leakage increases
Solution Approach 1:
The container FEC serves as an intermediary that prevents IGP inter-domain leakage while maintaining route aggregation benefits. By wrapping the detailed FEC information within the container FEC, the patent allows aggregated routes to be advertised in IGP without exposing detailed routing information across domains. The container FEC acts as a boundary that contains the detailed FEC information, preventing leakage while preserving forwarding efficiency.
3Reliability
If detailed FEC advertising is required for exact matching, then LSP establishment is ensured, but configuration complexity increases
Solution Approach 1:
The container FEC mechanism enables self-service LSP establishment where the system automatically creates LSPs based on the container FEC and detailed FEC information without requiring complex manual configuration. The patent describes how the MPLS label is automatically assigned to the container FEC, and LSPs are automatically established for detailed FECs within the container, eliminating the need for complex configuration while ensuring reliable LSP establishment.
Data Source
Figure 1~3
Figure 4a~5b
Figure 5c~7
AI summary
A message sending method, a binding relationship advertising method, a message sending apparatus, a binding relationship advertising apparatus, a storage medium and an electronic device are provided. The message sending method includes: receiving a first message on a first node subjected to route aggregation; in a case where the first message matches a first Incoming Label Map (ILM) table entry preset on the first node, swapping a label of the first message into an outgoing label corresponding to a detailed Forwarding Equivalence Class (FEC) to obtain a second message; and forwarding the second message to a downstream node according to a Label Switched Path (LSP) corresponding to the detailed FEC.