Integrated Router-Switch Port Mirroring for LAN-WAN Traffic Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional segregated router-switch systems require manual configuration of IEEE 802.1Q VLAN trunks, which is time-consuming and error-prone, especially as the number of user terminals and VLANs increases, limiting the ability to monitor traffic destined for or originating from WAN ports.
Innovation Solution
An integrated router-switch architecture automatically creates virtual IEEE 802.1Q VLAN trunks using a PCI bus interface, allowing the switch fabric and router's control processor to treat the processor interface as a regular LAN port, enabling automatic VLAN tagging and reducing the need for manual configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual configuration of IEEE 802.1Q VLAN trunks is used in segregated router-switch systems, then network connectivity between LAN and WAN can be established, but the configuration process becomes time-consuming and error-prone as the number of user terminals and VLANs increases
Solution Approach 1:
The patent combines the router and switch into a single integrated device with a unified control processor. This merging eliminates the need for separate manual VLAN trunk configurations between distinct router and switch devices, as the integrated architecture automatically manages VLAN tagging and traffic routing between LAN ports and WAN interface through a single control plane, dramatically reducing configuration time and complexity.
Solution Approach 2:
The integrated router-switch system implements automatic VLAN trunk creation and configuration through its control processor. The system self-configures VLAN tags and routing rules based on detected traffic patterns and port assignments, eliminating the need for manual administrator intervention in VLAN trunk setup. This self-service capability automatically adapts to changing network topologies and VLAN requirements.
2Ease of operation
If segregated router and switch subsystems are used, then network isolation and modular design are achieved, but the ability to monitor WAN port traffic through port-mirroring is lost due to mutual isolation between subsystems
Solution Approach 1:
By merging the router and switch into a single integrated device with unified access to the switch fabric, the system enables the control processor to directly mirror WAN interface traffic to any LAN port. This eliminates the subsystem isolation barrier that prevented WAN traffic monitoring in segregated architectures, while maintaining all the benefits of integration.
Solution Approach 2:
The integrated control processor provides universal access to all network interfaces and switch fabric resources. It can perform multiple functions including VLAN management, routing, and port-mirroring of any interface (LAN or WAN) to any monitoring port, making the traffic monitoring capability universal across all network segments without requiring separate monitoring subsystems.
3Manufacturing precision
If manual VLAN trunk configuration is required, then precise control over VLAN assignments can be achieved, but the process becomes tedious and error-prone especially as network scale increases
Solution Approach 1:
The integrated system's control processor automatically detects required VLAN assignments based on port configurations and traffic patterns, then self-configures the appropriate VLAN tags and routing rules. This maintains precise VLAN assignment control through automated logic while eliminating the time-consuming manual configuration process, especially beneficial as network scale increases.
Solution Approach 2:
The system performs preliminary automatic VLAN trunk creation and configuration before actual data traffic needs to flow. When new VLANs or ports are added to the network, the control processor proactively configures the necessary VLAN tags and routing rules in advance, ensuring immediate operational readiness without requiring subsequent manual intervention or causing configuration delays.
Data Source
AI summary
An integrated processor-controlled router and switch fabric architecture provides connectivity between local area network (LAN) ports of an Ethernet switch serving a plurality of local area network users and a wide area network (WAN) port that provides connectivity with the internet. The integrated switch fabric treats the processor interface back to the router as though it were a regular LAN port; as a result, all incoming (WAN-to-LAN) traffic and all outgoing (LAN-to-WAN) traffic relative to the processor interface can be mirrored to any LAN port of the Ethernet switch.