Internal Packet Queueing and Merge Logic for Scalable Switch Enqueueing
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Solution Overview
Problem
Existing methods for enqueueing both externally arriving and internally generated packets in network switches result in excessive bandwidth requirements, leading to high area and power consumption.
Innovation Solution
A scalable internal packet generation scheme utilizing an internal queueing engine (IQE) and arbitration logic to manage and enqueue internally generated packets, absorbing bursts and arbitrating different types of traffic, with rate limiting and priority queuing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brute force methods are used to enqueue both external and internal packets, then all packets can be handled, but the enqueue bandwidth doubles leading to increased area and power consumption
Solution Approach 1:
The patent segments the packet enqueueing process into two separate paths: external packets and internal packets. The internal queueing engine (IQE) is introduced as a dedicated component that handles internal packet generation and enqueueing independently from the main external packet path. This segmentation allows the system to handle internal packets without doubling the bandwidth requirements of the main enqueue path, thereby reducing area and power consumption while maintaining reliable packet handling for both external and internal sources.
2Reliability
If brute force methods are used to enqueue both external and internal packets, then all packets can be handled, but the enqueue bandwidth doubles leading to increased power consumption
Solution Approach 1:
The patent segments the packet enqueueing process into two separate paths: external packets and internal packets. The internal queueing engine (IQE) is introduced as a dedicated component that handles internal packet generation and enqueueing independently from the main external packet path. This segmentation allows the system to handle internal packets without doubling the bandwidth requirements of the main enqueue path, thereby reducing area and power consumption while maintaining reliable packet handling for both external and internal sources.
3Adaptability or versatility
If the system scales to handle additional internal packet sources and traffic types, then packet handling versatility improves, but device complexity increases
Solution Approach 1:
The internal queueing engine (IQE) is designed as a universal, multi-functional component that can handle multiple types of internal packet sources and traffic types through a single unified architecture. The IQE includes generic queueing structures and arbitration logic that can accommodate different packet types without requiring separate dedicated paths for each source. This multi-functionality allows the system to scale to handle additional internal packet sources and traffic types while avoiding the complexity increase that would result from creating separate handling mechanisms for each packet type.
Data Source
AI summary
An apparatus for scalable internal packet generation is provided. The apparatus includes one or more ingress points, one or more internal packet sources configured to generate one or more second packets, and a memory management unit. The memory management unit includes an internal queueing engine and merge function logic. The internal queueing engine is configured to obtain the one or more second packets from one or more internal packet sources and enqueue each of the one or more second packets in a respective first queue of the one or more first queues. Arbitration logic is configured to determine an order in which the one or more second packets are dequeued from the one or more first queues. Merge function logic is configured to combine the one or more second packets from the internal queueing engine with the one or more first packets.