Dynamic Queue Allocation for SDN Control Packets
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Solution Overview
Problem
In software defined networks (SDNs), control packets such as BFD and BGP packets face delays and drops due to high network load, leading to unnecessary disruptions and failovers, as they are mixed with less sensitive data packets and not adequately prioritized.
Innovation Solution
A method is implemented to select and configure processing queues for control packets, using packet inspection and filtering to prioritize them over data packets, ensuring timely delivery by allocating specific resources and dynamically modifying queues to prevent interference from malicious or overwhelming data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control packets are mixed with data packets in the same processing queue, then network interface resources are efficiently utilized, but control packets experience delays and drops under high load
Solution Approach 1:
The patent segments network traffic into different processing queues based on packet type. Control packets are separated from data packets into dedicated control queues, while data packets use separate data queues. This segmentation ensures that control packets receive priority processing and are not blocked by high-volume data traffic, resolving the contradiction between resource utilization and delivery reliability.
Solution Approach 2:
The patent applies local quality by assigning different service levels to different packet types within the network interface. Control packets are given high-priority treatment with guaranteed bandwidth and lower latency, while data packets receive best-effort service. This localized quality differentiation ensures control packet reliability without sacrificing overall network throughput.
2Reliability
If control packets are prioritized in dedicated processing queues, then delivery reliability is improved, but network interface complexity increases
Solution Approach 1:
The patent implements self-service through automated queue selection and dynamic configuration. The network interface automatically identifies control packets based on packet type and routes them to appropriate queues without manual intervention. Configuration parameters such as queue priorities and bandwidth allocations are automatically adjusted based on traffic patterns, reducing the complexity burden on network administrators.
Solution Approach 2:
The patent uses parameter changes to dynamically adjust queue characteristics based on network conditions. Queue priorities, bandwidth allocations, and threshold parameters are automatically modified in response to traffic load and control packet delivery requirements. This dynamic parameter adjustment maintains reliability while adapting to changing network conditions without requiring complex static configurations.
3Ease of manufacture
If static queue allocation is used for control packets, then configuration simplicity is maintained, but adaptability to changing network conditions is reduced
Solution Approach 1:
The patent introduces dynamics into queue allocation while maintaining configuration simplicity. The system automatically adapts queue parameters such as priority levels, bandwidth allocations, and threshold values in response to changing network conditions. This dynamic behavior is achieved through automated monitoring and adjustment mechanisms that respond to traffic patterns and delivery requirements without requiring complex manual reconfiguration.
Solution Approach 2:
The patent implements feedback mechanisms where the network interface continuously monitors control packet delivery performance and traffic conditions. Based on this feedback, the system automatically adjusts queue allocations and priorities to optimize delivery reliability. The feedback loop ensures that the system adapts to changing conditions while maintaining simple configuration through automated decision-making based on performance metrics.
Data Source
AI summary
Described herein are systems, methods, and software to enhance network traffic management. In one implementation, upon initialization of a computing system, the computing system may select one or more processing queues from a plurality of processing of processing queues to filter control packets of at least one software defined network. The computing system may further configure a network interface to filter the control packets to the identified one or more processing queues.