GRE Tunneling Protocol Dynamic Table Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional GRE tunnels in enterprise networks with multiple branch nodes require heavy configuration and maintenance due to frequent changes, leading to high processing demands on the central node for establishing and managing point-to-multipoint connections.
Innovation Solution
The introduction of a Network Mask field in the GRE header, with a flag bit 'A' indicating the presence of a subnet mask, allows for dynamic tunnel table establishment, refresh, and management, reducing the need for frequent configuration updates and improving maintenance efficiency by enabling tunnel table updates and refreshes based on traffic flow direction and subnet information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional GRE tunnels are used for point-to-multipoint connections in enterprise networks with multiple branch nodes, then individual tunnels can be established for each branch node, but heavy configuration and maintenance overhead occurs due to frequent changes in branch node configurations
Solution Approach 1:
The patent merges multiple individual GRE tunnel configurations into a single point-to-multipoint tunnel from the central node to multiple branch nodes. Instead of configuring separate tunnels for each branch node, the system uses one tunnel that can dynamically serve multiple branches, reducing configuration complexity while maintaining reliable connections.
Solution Approach 2:
The patent introduces dynamic characteristics to the GRE tunnel configuration, allowing the tunnel to adapt to frequent changes in branch node configurations. The tunnel can dynamically add or remove branch nodes without requiring complete reconfiguration, enabling the system to handle dynamic enterprise network environments efficiently.
2Adaptability or versatility
If individual GRE tunnels are established for each branch node connected to the central node, then point-to-multipoint connectivity is achieved, but high processing demand is imposed on the central node for establishing and managing these tunnels
Solution Approach 1:
The patent combines multiple individual tunnel management tasks into a single point-to-multipoint tunnel management process. The central node manages one tunnel that serves multiple branch nodes, significantly reducing the processing demand compared to managing separate tunnels for each branch node, while maintaining the same level of connectivity flexibility.
Solution Approach 2:
The patent makes the single GRE tunnel multi-functional by enabling it to serve multiple branch nodes simultaneously. The tunnel can dynamically adapt to different branch nodes' requirements, providing universal connectivity service that reduces the central node's processing burden while maintaining network flexibility.
3Adaptability or versatility
If frequent changes in branch node configurations occur, then network adaptability is improved, but maintenance overhead increases due to high configuration processing demand on the central node
Solution Approach 1:
The patent introduces dynamic configuration management that allows the GRE tunnel to automatically adapt to frequent changes in branch node configurations. The system can dynamically add, remove, or modify branch nodes in the tunnel without requiring manual reconfiguration, reducing maintenance time while maintaining high network adaptability.
Solution Approach 2:
The patent enables the GRE tunnel configuration to be self-managing, where the tunnel automatically handles configuration changes based on branch node status. The system can autonomously adapt to configuration changes without requiring extensive manual intervention, reducing maintenance overhead while preserving configuration adaptability.
Data Source
AI summary
A method of forwarding GRE encapsulated messages by a forwarding device. The method comprises the forwarding device setting up a tunnel table entry upon receipt of a GRE encapsulated message, the GRE encapsulated message comprising subnet mask information of a subnet; and sending a response message to the subnet after setting up the tunnel table entry, the response message comprising information informing the subnet of the setting up of said tunnel table entry.