DHCP Relay Agent Automates CMTS Traffic Routing
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Solution Overview
Problem
The existing cable network infrastructure, optimized for one-way downstream service, faces challenges in configuring two-way communication for digital services, requiring costly upgrades and complex manual intervention for DHCP server management across multiple CMTSs.
Innovation Solution
An intermediary DHCP relay device is introduced to automatically route DHCP traffic by accessing a map database containing information about back-end servers, allowing it to route messages to the appropriate server based on the message content and server data, simplifying CMTS configuration and eliminating the need for manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual configuration of DHCP servers across multiple CMTSs is used, then network control and management are maintained, but operational complexity and time consumption increase significantly
Solution Approach 1:
The patent introduces a DHCP relay agent as an intermediary component between CMTSs and DHCP servers. This relay agent automatically forwards DHCP messages between clients and servers, eliminating the need for manual configuration of DHCP server settings on each CMTS. The relay agent maintains a mapping table that automatically routes DHCP traffic to the appropriate server based on CMTS identification, thereby reducing operational complexity and configuration time.
2Adaptability or versatility
If DHCP servers are distributed across multiple locations to serve different CMTSs, then service coverage is improved, but system complexity and maintenance difficulty increase
Solution Approach 1:
The DHCP relay agent is designed to work with multiple DHCP servers located at different positions relative to the CMTS. It provides a universal interface that handles DHCP message forwarding regardless of the server's physical location or the number of servers involved. The relay agent's mapping table can dynamically adapt to different server configurations, allowing the system to serve multiple CMTSs with diverse server arrangements without increasing overall system complexity.
3Productivity
If automatic routing of DHCP traffic is implemented, then operational efficiency is improved, but requirements for additional network components and configuration data increase
Solution Approach 1:
The DHCP relay agent implements automatic routing by maintaining a mapping table that associates CMTS identifiers with corresponding DHCP server addresses. When a DHCP message arrives, the relay agent automatically extracts the CMTS identification from the message, queries the mapping table, and forwards the message to the appropriate server without requiring manual intervention. This self-service mechanism improves routing efficiency while minimizing the need for extensive configuration data, as the mapping table can be automatically populated and updated.
Data Source
AI summary
At an intermediary dynamic host configuration protocol relay device, over a network, a dynamic host configuration protocol message is obtained from one of a plurality of remote dynamic host configuration protocol relay devices in communication with the intermediary dynamic host configuration protocol relay device over the network. The intermediary dynamic host configuration protocol relay device accesses data pertaining to a plurality of dynamic host configuration protocol back-end servers logically fronted by the intermediary dynamic host configuration protocol relay device. Based on information in the dynamic host configuration protocol message and the data pertaining to the plurality of dynamic host configuration protocol back-end servers, the dynamic host configuration protocol message is routed to an appropriate one of the plurality of back-end dynamic host configuration protocol servers.