Communication Apparatus Preventing Default Route Switching
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Solution Overview
Problem
Communication disruptions occur in network cameras that dynamically switch default routes when using multiple network interfaces, leading to unintended service interruptions, especially in critical applications like video distribution.
Innovation Solution
A communication apparatus with multiple network interfaces is designed to prevent dynamic switching of the default route by setting one interface as the main interface for preferred communication and restricting the sub-interface to only communicate within the same network segment, using a default gateway only on the main interface and excluding the sub-interface from the default route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic route switching is implemented for multiple network interfaces, then adaptability and versatility are improved, but communication stability and reliability deteriorate due to unwanted interruptions
Solution Approach 1:
The patent segments the network interface functionality by introducing the concept of main interface and sub interface. The main interface is designated for default route communication while sub interfaces are restricted to local network segment communication. This segmentation prevents dynamic route switching by clearly defining the role of each interface, thereby maintaining communication stability while still allowing multiple interfaces to be utilized in parallel for different purposes.
2Productivity
If multiple network interfaces are used in parallel, then productivity and functionality are improved, but route management complexity increases leading to service interruptions
Solution Approach 1:
The patent applies preliminary action by pre-configuring the default gateway setting unit to automatically identify and set the main interface before communication begins. The system proactively designates one interface as the main interface for default route communication and configures sub interfaces to exclude default gateway settings. This preliminary configuration prevents route switching complexity during operation, allowing multiple interfaces to work in parallel without service interruptions.
Data Source
AI summary
A communication apparatus sets a first obtaining method for obtaining IP addresses of a first network interface and an external server with which the communication apparatus communicates via the first network interface, and a second obtaining method for obtaining IP addresses of a second network interface and an external server with which the communication apparatus communicates via the second network interface. If the first obtaining method is manual obtaining, if the second obtaining method is automatic obtaining, and if setting of a default gateway has been set with respect to the first network interface, the communication apparatus controls communications by using at least the IP address of the second network interface obtained by the automatic obtaining without using the IP address of the external server obtained by the automatic obtaining via the second network interface.