Ethernet has been a backbone of data centers since inception of cloud computing. The reason is its simplicity, cost effectiveness, wide existing base, and maturity. However, Ethernet is unreliable when it comes to providing guaranteed transmission. Consequently, IEEE 802.1Qbb standard has been introduced to provide reliability based on congestion notification (CN) mechanism of IEEE 802.3x. However, IEEE 802.1Qbb has some issues and limitations, such as higher buffer space reservation, lack of support for heterogeneous switching devices, and low throughput and efficiency of the network. This letter proposes a novel approach for modified CN mechanism that provides 44 percent less space reservation for CN mechanism, support for heterogeneity, higher throughput, and efficiency.

中文翻译：

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IEEE 802.1Qbb中拥塞通知的动态阈值计算


自云计算诞生以来，以太网一直是数据中心的支柱。原因是它的简单性、成本效益、广泛的现有基础和成熟度。然而，以太网在提供有保证的传输方面并不可靠。因此，IEEE 802.1Qbb 标准被引入，以提供基于 IEEE 802.3x 拥塞通知 (CN) 机制的可靠性。然而，IEEE 802.1Qbb存在一些问题和局限性，例如较高的缓冲区空间预留、缺乏对异构交换设备的支持以及网络吞吐量和效率较低等。这封信提出了一种改进 CN 机制的新方法，为 CN 机制提供减少 44% 的空间预留、支持异构性、更高的吞吐量和效率。