Link Aggregation Group Configuration in Extended Bridge Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current extended bridge systems face challenges in efficiently load-sharing downstream and upstream packets across multiple ports, leading to potential reliability issues and inefficient packet routing.
Innovation Solution
The system forms a link aggregation group by associating an aggregation port with multiple extended ports, assigning identifiers, and using the Port Extender Control and Status Protocol (PE CSP) to manage packet routing, ensuring that packets are properly routed through the aggregated port, thereby enhancing load-sharing and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple extended ports are connected to the same terminal without link aggregation, then device complexity is reduced, but reliability and load-sharing efficiency deteriorate
Solution Approach 1:
The patent combines multiple extended ports into a single link aggregation group (LAG) that appears as one logical port to the terminal. This merging allows multiple physical ports to work together as a unified interface, improving reliability through redundancy and enabling load-sharing across member ports while maintaining simple terminal configuration.
2Device complexity
If multiple extended ports are connected to the same terminal without link aggregation, then device complexity is reduced, but productivity deteriorates due to inefficient packet routing
Solution Approach 1:
Multiple extended ports are merged into a single LAG interface, allowing packets to be efficiently distributed across multiple member ports. The control bridge manages load-sharing algorithms to optimize packet routing throughput while presenting a single logical interface, thereby improving productivity without increasing terminal configuration complexity.
Solution Approach 2:
The system implements PE CSP protocol for dynamic feedback between control bridge and port extenders. This feedback mechanism enables real-time monitoring and adjustment of packet routing across member ports, optimizing load distribution and ensuring efficient utilization of available bandwidth for improved productivity.
3Reliability
If link aggregation group is configured with multiple extended ports, then reliability is improved through load-sharing, but device complexity increases
Solution Approach 1:
The control bridge acts as an intermediary that manages the complexity of link aggregation configuration. It handles LAG setup, member port assignment, and PE CSP protocol communication, shielding terminal users from complex configuration details while enabling reliable load-sharing across multiple extended ports through centralized control.
Data Source
AI summary
In an extended bridge comprising a controlling bridge and a port extender, the controlling bridge associates an aggregation port of a link aggregation group with a plurality of extended ports connecting to a same terminal on the port extender, and assigns an aggregation port identifier to the aggregation port. The controlling bridge associates an extended port identifier of each of the plurality extended ports and a cascaded port connecting to the port extender with the aggregation port. The controlling bridge associates the aggregation port with the aggregation port identifier and the cascaded port to determine to add the aggregation port identifier into a downstream unicast packet of which an egress port exiting the extended bridge is the aggregation port and to via determine to send the downstream unicast packet with the aggregation port identifier via the cascaded port.