Network Router Prefix Allocation Through Link-Level VIF Sharing
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Solution Overview
Problem
Existing systems limit prefix allocation to virtual interfaces (VIFs) based on a default maximum value, leading to inefficient use of routing resources and potential failures when administrators cannot allocate all desired prefixes to a single VIF, resulting in unused resources.
Innovation Solution
Allow entities to specify intended prefix allocations up to the number of prefixes supported by the routing resources, with management resources verifying that these allocations meet operational criteria to prevent routing session failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prefix allocation is limited to individual virtual interfaces with a default maximum value, then routing resources are allocated in a controlled manner, but routing resources remain unused when administrators cannot allocate all desired prefixes to a single VIF
Solution Approach 1:
The patent segments prefix allocation at the link level rather than at the VIF level. By introducing link-level prefix allocation, the system allows multiple VIFs under a single link to share a pooled prefix allocation, enabling more flexible and efficient resource distribution while maintaining routing session stability through controlled allocation boundaries.
Solution Approach 2:
The patent adds a new dimension of allocation hierarchy by introducing link-level abstraction between physical links and virtual interfaces. This dimensional change allows prefix allocation to occur at an intermediate level that aggregates multiple VIFs, thereby reducing unused resources while preserving the ability to control routing sessions through link-level management.
2Productivity
If prefix allocation is increased beyond default limits, then more routing resources become available for allocation, but the risk of routing session failures increases
Solution Approach 1:
The patent implements feedback mechanisms where management resources monitor prefix allocation status and operational criteria in real-time. When allocation approaches thresholds that could cause routing session failures, the system provides feedback to adjust allocations dynamically, thereby maximizing prefix allocation efficiency while maintaining reliability through continuous monitoring and adaptive control.
Solution Approach 2:
The patent applies preliminary verification of operational criteria before allowing prefix allocation changes. Management resources pre-check whether proposed allocations meet stability thresholds and routing session requirements, preventing potentially harmful allocations from being applied in the first place. This proactive approach maximizes resource utilization while avoiding routing session failures before they can occur.
3Reliability
If management resources verify operational criteria for prefix allocations, then routing session failures are prevented, but system complexity increases
Solution Approach 1:
The patent makes management resources multi-functional by having them perform both prefix allocation verification and operational criteria monitoring within a unified framework. This universal approach consolidates multiple management functions into single components, reducing overall system complexity while maintaining comprehensive reliability through integrated verification of allocation and operational parameters.
Data Source
AI summary
Systems and methods are provided for management of prefix allocation for a user network through distribution of prefixes to one or more virtual interfaces (VIFs) used to support communication of data between the user network and the network service provider. Management resource(s), which may be implemented by components of a network provider or routing resource(s), may be configured to receive the specified intended allocation of prefixes and verify that the intended allocation of prefixes meets at least one operational criterion based on utilization tracking data for prefix availability with respect to the user network. After verification, routing resources may advertise prefixes to a network service provider in accordance with the specified intended allocation of prefixes. The management resources may also update the utilization tracking data in the first data store to reflect allocation of the prefixes.