DeltaINT:以极低的带宽开销实现通用带内网络遥测

Siyuan Sheng, Qun Huang, P. Lee
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引用次数: 17

摘要

带内网络遥测(INT)通过将完整的设备内部状态沿其转发路径嵌入到每个数据包中来大规模地丰富网络管理,但这种INT信息的嵌入也会在数据平面上产生显着的带宽开销。我们提出DeltaINT,这是一个通用的INT框架,它实现了极低的带宽开销,并支持网络管理中的各种包级和流级应用。DeltaINT基于这样一种认识,即状态变化在大多数情况下通常是可以忽略不计的,因此,只有当状态变化被认为是重要的时,它才会将状态嵌入到数据包中。我们从理论上推导了DeltaINT的时间/空间复杂度和带宽缓解的界限。我们在软件和P4中都实现了DeltaINT。我们的评估表明,DeltaINT减少了高达93%的INT带宽,并且在赤脚Tofino交换机中部署它会导致有限的硬件资源使用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
DeltaINT: Toward General In-band Network Telemetry with Extremely Low Bandwidth Overhead
In-band network telemetry (INT) enriches network management at scale through the embedding of complete device-internal states into each packet along its forwarding path, yet such embedding of INT information also incurs significant band-width overhead in the data plane. We propose DeltaINT, a general INT framework that achieves extremely low bandwidth overhead and supports various packet-level and flow-level applications in network management. DeltaINT builds on the insight that state changes are often negligible at most time, so it embeds a state into a packet only when the state change is deemed significant. We theoretically derive the time/space complexities and the bounds of bandwidth mitigation for DeltaINT. We implement DeltaINT in both software and P4. Our evaluation shows that DeltaINT reduces up to 93% of INT bandwidth, and its deployment in a Barefoot Tofino switch incurs limited hardware resource usage.
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