Network Switch ARP Table Management via External Propriety Control
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Solution Overview
Problem
Network switches with complex configurations are expensive and require costly hardware implementations, particularly when they need to manage ARP tables efficiently and securely, as they often overflow due to increased connected devices and are prone to attacks like ARP spoofing.
Innovation Solution
A network switch design that includes a table record portion, information addition portion, relay portion, and rewrite portion, where the ARP table records address information for multiple protocols, allows external devices to manage propriety information, simplifying the switch's configuration by delegating the determination of address availability and enabling secure management of ARP table entries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network switch includes complex configuration for managing ARP tables and determining address availability, then the security and reliability are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the function of determining address availability and managing ARP table propriety from the network switch itself, delegating it to an external device. This removes the complex configuration requirements from the switch while maintaining security through external management of address information validity.
Solution Approach 2:
The patent introduces an external device as an intermediary that manages the propriety information of address information in the ARP table. This intermediary handles the complex security determination functions, allowing the network switch to maintain simple configuration while achieving reliable security through the external management layer.
2Reliability
If the network switch includes complex configuration for managing ARP tables, then the reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent extracts the complex security management functions from the network switch hardware, implementing them externally. This extraction allows the switch to be manufactured with simpler, less expensive components while maintaining security through the external system that manages address information propriety.
3Adaptability or versatility
If the ARP table records address information for multiple protocols, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the complexity of managing multi-protocol address information from the network switch, delegating it to an external device that manages the ARP table. This allows the switch to support multiple protocols through simple table lookups while the external system handles the complex determination of address availability across different protocols.
Data Source
AI summary
A network switch includes: a table record portion that records an address solution table that records multiple address information; an information addition portion that adds new address information for a new communication device based on the address solution data to the address information table; a relay portion that relays data other than the address solution data; and a rewrite portion that rewrites at least one of the address solution table or propriety information in accordance with an external instruction output from an external device. The address solution table includes the propriety information indicating availability propriety of the address information for each of the multiple address information. The relay portion relays the data by utilizing the address information set to be utilizable in the propriety information.