Mapping Non-Attached Subnetworks to CMTS for QoS Enforcement
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Solution Overview
Problem
Service providers face challenges in monitoring and policing non-attached subnetworks, as they lack the necessary mapping to enforce Quality of Service (QoS) guidelines, especially when clients are multiple routing hops away or have static IP addresses, preventing effective bandwidth management and security measures.
Innovation Solution
The implementation of a system where COPS servers transmit custom queries to CMTSs to obtain Object Identifications (OIDs) of non-attached subnetworks, allowing for the creation of mappings between CMTSs and non-attached CPEs, enabling COPS servers to enforce QoS guidelines by determining the corresponding CMTS and sending messages to constrain bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If service providers monitor bandwidth usage by client devices, then network security and QoS enforcement are improved, but the ability to police non-attached subnetworks deteriorates due to lack of mapping information
Solution Approach 1:
The system performs preliminary mapping of non-attached subnetworks to CMTS devices before policing actions are needed. The COPS server proactively discovers and stores mapping information between non-attached subnetworks and their serving CMTS devices, so that when bandwidth policing or security actions are required, the mapping information is already available without needing to query at the moment of enforcement.
2Adaptability or versatility
If COPS servers query CMTSs for mapping information of non-attached subnetworks, then the ability to enforce QoS guidelines is improved, but system complexity and query overhead increase
Solution Approach 1:
The COPS server performs preliminary discovery and mapping of non-attached subnetworks to CMTS devices before policing actions are needed. By proactively establishing the mapping relationships and storing them locally, the system avoids the need for repeated real-time queries when enforcement actions are required, thereby reducing system complexity and query overhead while maintaining full QoS enforcement capability.
3Productivity
If service providers implement mapping for non-attached subnetworks, then bandwidth management capability is improved, but the complexity of monitoring and querying increases
Solution Approach 1:
The system implements preliminary mapping of non-attached subnetworks to CMTS devices, storing the mapping information in the COPS server. This proactive approach establishes the relationships beforehand, enabling efficient bandwidth management when needed without requiring complex real-time monitoring and querying mechanisms. The preliminary mapping simplifies subsequent bandwidth enforcement actions.
Data Source
AI summary
A method and system to create a mapping of non-attached subnetworks to a Cable Modem Termination System (CMTS) associated with the non-attached subnetwork is provided herein. The method includes transmitting a query to the CMTS for an identification of the non-attached subnetwork and receiving the identification from the CMTS. The method further includes parsing the identification to determine an address of the non-attached subnetwork and mapping an association of the CMTS to the non-attached subnet in a database based on the address.