Privileged Node Control Traffic Prioritization in IP Networks
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Solution Overview
Problem
Network packet processors face challenges in maintaining service availability and quality of service (QoS) by distinguishing and managing different types of traffic from privileged and non-privileged nodes, which is crucial for reducing latency and ensuring throughput.
Innovation Solution
The method involves determining whether a packet represents control traffic and is from a privileged node by analyzing attributes such as network protocol, address fields, and application type, and modifying attributes like traffic class, drop precedence, or bandwidth restriction, with dynamic updates based on node status attributes stored in a database, to prioritize and process packets accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control traffic from privileged nodes is prioritized, then service availability and QoS are improved, but network security risks increase
Solution Approach 1:
The patent applies local quality by differentiating treatment based on source node privilege status. Control traffic from privileged nodes receives higher priority processing with enhanced QoS attributes, while traffic from non-privileged nodes receives standard processing. This localized differentiation resolves the contradiction by providing enhanced service availability for authorized nodes without compromising overall network security.
Solution Approach 2:
The system performs preliminary identification of privileged nodes through authentication mechanisms before allowing differentiated service treatment. By pre-establishing node privilege status and implementing rate limiting thresholds in advance, the system prevents malicious actors from exploiting priority treatment while ensuring legitimate privileged nodes receive timely service during peak loads.
2Loss of time
If packet processing priority is increased for control traffic, then latency is reduced, but processing complexity increases
Solution Approach 1:
The patent segments packet processing into distinct paths based on source node privilege status and traffic type. A first path handles control traffic from privileged nodes with high priority and reduced latency, while a second path handles other traffic with standard processing. This segmentation resolves the contradiction by providing low-latency processing for critical traffic without requiring the entire processing system to operate at maximum complexity.
Solution Approach 2:
The system dynamically adjusts processing priority and QoS attributes based on real-time conditions such as network load and node privilege status. By making processing parameters dynamic rather than static, the system optimizes latency for control traffic from privileged nodes while adapting to changing network conditions, thereby reducing the need for overly complex fixed processing rules.
3Object-affected harmful factors
If rate limiting is applied to non-privileged nodes, then security is improved, but throughput decreases
Solution Approach 1:
The patent applies local quality by implementing different rate limiting policies based on source node privilege status. Non-privileged nodes are subject to rate limiting with reduced throughput to prevent security threats, while privileged nodes receive unlimited or higher rate treatment. This localized approach resolves the contradiction by maintaining security for unknown nodes without penalizing authorized nodes with high throughput requirements.
Solution Approach 2:
The system performs preliminary authentication and privilege verification before applying rate limiting. By pre-establishing which nodes are privileged and which are not, the system can confidently apply restrictive rate limiting to non-privileged nodes for security while ensuring privileged nodes maintain full throughput capability, thus resolving the contradiction between security and productivity.
Data Source
AI summary
A network device receives a packet at a network interface and determines whether the packet represents control traffic. The network device also determines whether the packet is received from a privileged node. To achieve this, a source address is extracted from the packet, a query of the source address is performed in an address database, and a node status attribute associated with the source address is returned from the address database. If the packet represents control traffic and is received from a privileged node, the network device may modify one or more attributes of associated with the packet. These attributes may include a traffic class, drop precedence, or bandwidth restriction. Packets that represent control traffic may be placed in a priority queue for further processing based upon their modified attributes.