RPR Network Packet Forwarding Source Loop Prevention
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Solution Overview
Problem
In Resilient Packet Ring (RPR) networks, redundant forwarding of flooding data packets to the source network device increases the working load of last-hop network devices and wastes link bandwidth, as these packets are unnecessarily forwarded back to the source after traversing the network.
Innovation Solution
A packet forwarding method where network devices determine if the next-hop node is the source node and adjust the Time To Live (TTL) value of flooding packets, discarding or forwarding them accordingly to prevent redundant forwarding, thereby optimizing load and bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flooding data packets are forwarded back to the source network device after traversing the network, then the network follows standard forwarding procedures, but the working load of last-hop network devices increases and link bandwidth is wasted
Solution Approach 1:
The patent extracts the harmful redundant forwarding action from the standard forwarding procedure. By detecting when a flooding packet's next-hop is the source device, the system removes this packet from the forwarding chain before it can cause redundant transmission, thus eliminating the waste of bandwidth and device load while maintaining proper forwarding for all other cases
Solution Approach 2:
The patent applies preliminary anti-action by proactively identifying and preventing redundant forwarding before it occurs. The last-hop network device checks whether the next-hop address matches the source device address, and if so, discards the packet in advance. This prevents the harmful effect of redundant transmission on bandwidth and device load before it can manifest
2Stability of the object's composition
If flooding data packets are forwarded back to the source network device, then complete packet circulation is maintained, but link bandwidth is wasted
Solution Approach 1:
The patent converts the potentially harmful redundant packet transmission into a beneficial bandwidth conservation mechanism. By identifying packets that would complete a full circulation back to the source, the system discards them strategically, transforming what would be wasted bandwidth into conserved network resources while maintaining the essential circulation function for legitimate traffic
3Ease of operation
If the last-hop network device forwards flooding packets to the source, then standard routing is followed, but redundant forwarding increases device working load
Solution Approach 1:
The patent introduces dynamic decision-making into the forwarding process. Instead of blindly following standard routing, the last-hop network device dynamically evaluates whether the next-hop address equals the source address. Based on this condition, it either discards the packet (reducing load) or forwards it normally (maintaining standard routing), thus adapting the forwarding behavior to specific conditions
Data Source
AI summary
A network device in a RPR network receives a RPR flooding data packet sent by another network device in the RPR network, determines whether a next-hop network device of the RPR flooding data packet is a source network device sending the RPR flooding data packet, and strips the RPR flooding data packet when determining that the next-hop network device of the RPR flooding data packet is the source network device sending the RPR flooding data packet.