Sel-INT: A Runtime-Programmable Selective In-Band Network Telemetry System

Deterministic and Probabilistic P4-Enabled Lightweight In-Band Network Telemetry

“…Sel-INT [12] adjusts the sampling rate of INT runtime along with related monitoring information (i.e., locations to collect INT data, INT data types), a trade-off between monitoring accuracy and INT overhead. The sampling rate is set by the SDN controller.…”

“…Since INT encodes per-hop information, it inevitably leads to a substantial transmission overhead, which grows linearly with the number of hops. Besides the bandwidth wasted with INT, the extra transmission overhead leads to reduced goodput and excessive flow completion time [11], [12].…”

IntOpt: In-band Network Telemetry optimization framework to monitor network slices using P4

“…With the recent advances in programmable data-planes such as P4 [27] along with proper compiler and hardware support [35,36], collecting fine-grained telemetry items from the data-plane is possible at line-rate using e.g. In-band Network Telemetry (INT) [37,38]. While telemetry systems that rely on programmable switches alone can scale to high traffic rates, they give up expressiveness to achieve this scalability.…”

Towards a holistic semantic support for context-aware network monitoring

“…INT framework follows a paradigm where network status is collected and reported resorting uniquely to the data plane, i.e., without intervention of the control plane. Although claimed to be generic, this approach poses several concerns and drawbacks as it implies a new protocolar layer, the presence of INT-capable devices, increasing the overhead of packets, as discussed in the literature [13]. Despite this, the emergence of a protocol-independent packet processor (P4) as a tool to support the management of INT messages in an interoperable and simple way [14] will possibly foster the adoption of INT for particular contexts, e.g.…”