FINT: Flexible In-band Network Telemetry method for data center network

Xie, Shengxu; Hu, Guyu; Xing, Changyou; Zu, Jiachen; Liu, Yaqun

doi:10.1016/j.comnet.2022.109232

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…A downside of this approach is that the initial packets of a flow may be forwarded without any telemetry data. Nevertheless, this is inline with several INT methods that exercise sampling, inserting telemetry values only into a subset of packets (e.g., [14]). In the case of CLINT, we consider that this implication is minor, especially for the monitoring of long-lived flows.…”

Section: A Setup Phasementioning

confidence: 78%

“…As the mitigation of this problem is imperative for the application of INT in a scalable and robust fashion, various INT methods have exercised deterministic and probabilistic approaches, aiming to spread telemetry values across multiple packets (e.g., [12], [14], [14], [24]). Since most of existing INT approaches either rely on the data plane for INT node coordination or perform INT actions based on probabilities (both of which yield certain shortcomings, as we discuss in Section III), in this paper, we present a new lightweight INT approach with a minimum controller intervention, aspiring to remedy the implications of existing INT methods.…”

Section: In-band Network Telemetrymentioning

confidence: 99%

“…FS-INT alleviates the overhead of P4-INT by sampling packets that telemetry data is inserted [14]. Sampling can be conducted either with a fixed rate or alternatively can be event-based.…”

Section: B Dataplane-based Intmentioning

confidence: 99%

“…FINT proposes a method for the encapsulation of telemetry data in a more flexible manner [14]. More specifically, the administrator can dynamically modify the telemetry data being collected, as well as its distribution among packets.…”

Section: B Dataplane-based Intmentioning

confidence: 99%

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CLINT: Controller-Assisted Lightweight In-Band Network Telemetry

Papadopoulos,

Papadimitriou

2024

IEEE Access

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The increasing need for high-precision monitoring and network-wide observability has spurred significant interest in In-Band Network Telemetry (INT), which empowers the collection of monitoring data directly from the dataplane, thus, alleviating the various shortcoming of passive monitoring techniques. INT, in some of its initial forms (e.g., P4-INT), tends to accumulate per-hop telemetry values within each packet, introducing substantial transmission overhead. Recent efforts to alleviate this shortcoming spread per-hop telemetry values among multiple packets, but eventually cause other implications, such as INT data redundancy or collisions during state lookup, stemming from the probabilistic data structures that they employ. Along these lines, we stress on the need for a lightweight INT approach with deterministic behavior. To this end, we present a new INT approach (Controller-Assisted Lightweight In-Band Network Telemetry -CLINT) that relies on a telemetry controller for the coordination of INT nodes, through the update of telemetry states, which indicate at each instance the telemetry action that should be applied to each incoming packet. We discuss in detail the operation of CLINT, as well as its prototype implementation using P4 BMv2 and the P4Runtime API. Our evaluation results indicate that CLINT outperforms two state-of-the-art lightweight INT techniques (i.e., PINT and DLINT) in terms of monitoring efficiency and network update detection, while maintaining an insignificant control communication overhead. INDEX TERMSIn-band network telemetry (INT), network monitoring, software-defined networks, programmable dataplanes

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Section: A Setup Phasementioning

confidence: 78%

Section: In-band Network Telemetrymentioning

confidence: 99%

“…FS-INT alleviates the overhead of P4-INT by sampling packets that telemetry data is inserted [14]. Sampling can be conducted either with a fixed rate or alternatively can be event-based.…”

Section: B Dataplane-based Intmentioning

confidence: 99%

Section: B Dataplane-based Intmentioning

confidence: 99%

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CLINT: Controller-Assisted Lightweight In-Band Network Telemetry

Papadopoulos,

Papadimitriou

2024

IEEE Access

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“…FINT [28], based on a triple bitmap, enables setting telemetry tasks and parameters (i.e., the combination of telemetry metadata types, the INT period, etc.) dynamically at runtime.…”

Section: A Deterministic Int Techniquesmentioning

confidence: 99%