Topology Map Engine for Automatic IP Address Allocation Discovery
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Solution Overview
Problem
Cable network operators face challenges in configuring their networks for two-way digital communication, as existing systems optimized for one-way downstream service require significant upgrades and costly new equipment to support broadband Internet and other services, and there is a need for more accurate and efficient management of IP address allocation in expanding networks.
Innovation Solution
A system and method for automatically learning and maintaining IP address allocation topology, which involves a topology map engine that obtains dynamic host control protocol (DHCP) relay device information, searches for and stores IP addresses, and discovers statically allocated addresses by observing DHCP traffic, allowing for real-time tracking and consolidation of topology information without manual configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual configuration methods are used for IP address allocation, then configuration accuracy can be maintained, but the complexity of network management increases and time consumption increases
Solution Approach 1:
The system enables automatic self-discovery of IP address allocation topology through DHCP traffic observation. The topology map engine automatically learns and maintains IP address bindings without manual configuration, allowing the network to self-update its topology information as devices are added or moved.
Solution Approach 2:
The system pre-establishes the topology map database structure and DHCP observation mechanisms in advance. By continuously monitoring DHCP requests and responses before actual allocation issues occur, the system maintains up-to-date topology information proactively rather than reactively.
2Loss of time
If automatic discovery methods are implemented, then the time required for topology mapping is reduced, but the precision of topology information may deteriorate
Solution Approach 1:
The system continuously monitors DHCP traffic and uses feedback from actual DHCP requests and responses to verify and update topology information. The topology map engine compares observed DHCP allocations with the stored topology database, correcting discrepancies and maintaining high accuracy through continuous validation.
Solution Approach 2:
The system replaces manual mechanical configuration processes with automated electronic observation of DHCP protocols. By substituting human operators with automated DHCP packet analysis, the system achieves both speed (automatic discovery) and accuracy (protocol-based verification).
3Loss of information
If DHCP traffic observation is used for discovering statically allocated addresses, then complete topology information can be obtained, but the amount of data to be processed increases
Solution Approach 1:
The system extracts only the essential topology-relevant information from DHCP traffic, specifically focusing on IP address allocations and device identifiers. By filtering out unnecessary DHCP message details and extracting only the binding information needed for topology mapping, the system reduces processing overhead while maintaining completeness.
Solution Approach 2:
The DHCP observation mechanism serves multiple functions simultaneously: it discovers dynamically allocated addresses, identifies statically allocated addresses, validates existing topology information, and updates the topology database. This multi-functionality reduces the need for separate discovery mechanisms and optimizes data processing efficiency.
Data Source
AI summary
A topology map engine obtains, from a dynamic host control protocol relay device, a relayed request, of a client, for a dynamic host control protocol lease. The relayed request has at least one given IP address of the dynamic host control protocol relay device inserted therein. A search is made in a database for that IP address. If not found, dynamic host control protocol relay device information is obtained. This information includes: an identifier of the dynamic host control protocol relay device; and at least one network interface of the dynamic host control protocol relay device and any internet protocol addresses assigned to same. This information is obtained at the topology map engine and stored in the database.