Switching Device Bridging Frame MAC Address Synchronization
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Solution Overview
Problem
In multi-chassis link aggregation systems, synchronizing address tables between network relay devices is complex and can lead to communication bandwidth congestion due to frequent flooding operations when one device does not receive ARP requests or frames with unknown destination MAC addresses, causing mismatched address tables.
Innovation Solution
A communication system where each switching device creates bridging frames containing transmission source addresses and port identifiers, allowing the other device to update its address table, thereby simplifying the synchronization process and reducing bandwidth congestion by using bridging frames for both unicast and non-unicast operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If address table information is exchanged via communication line between two switching devices, then address table synchronization is achieved, but communication bandwidth is consumed and process complexity increases
Solution Approach 1:
Each switching device independently learns MAC addresses by receiving frames and automatically updates its own address table without requiring complex exchange protocols with the other device. The device serves itself by autonomously building and maintaining its address table through normal frame reception.
2Reliability
If flooding operation is performed frequently to synchronize address tables, then address table consistency is maintained, but communication bandwidth is congested
Solution Approach 1:
Each switching device independently learns MAC addresses by receiving frames and automatically updates its own address table without requiring complex exchange protocols with the other device. The device serves itself by autonomously building and maintaining its address table through normal frame reception.
3Reliability
If ARP requests or frames with unknown destination MAC addresses are received frequently, then address table learning occurs, but flooding operations increase and bandwidth is consumed
Solution Approach 1:
Each switching device independently learns MAC addresses by receiving frames and automatically updates its own address table without requiring complex exchange protocols with the other device. The device serves itself by autonomously building and maintaining its address table through normal frame reception.
Data Source
AI summary
An address table can be easily shared (synchronized) between two switching devices for which multi-chassis link aggregation is set. When a destination port of a frame received at a port P2 is a port P1, one of the two switching devices for which the multi-chassis link aggregation is set creates a bridging frame containing a transmission source address contained in the flame and an identifier of the port which has received, and transfers the bridging frame from a bridging port. When the other of the two switching devices receives the bridging frame, the other of the two switching devices detects the identifier of the port which has received and the transmission source address from the frame, and updates an address table of its own based on the identifier, the transmission source address, and a link table of its own.