• Author : Padmanabh Ratnakar

 
 

Inband Telemetry

Description For network monitoring and troubleshooting flow related issues, it is desirable to know the path, latency, queue and congestion information for flows at different times. The inband telemetry feature(INT) is used to gather per flow telemetry information like path, per hop latency and congestion. For enabling inband telemetry, inband telemetry domain should be created using switches which support inband telemetry. Interfaces on the edge of the domain should be configured as edge ports and interfaces inside the domain as core ports. On edge ports, sampling of packets is done at ingress and INT flows are terminated at egress. INT...
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Postcard Telemetry

Description The postcard telemetry feature is used to gather per flow telemetry information like path and per hop latency. For network monitoring and troubleshooting flow related issues, it is desirable to know the path, latency and congestion information for flows at different times. Postcard telemetry samples flows at every switch, aggregates them and sends the samples to a collector with path and latency information using GRE encapsulation. For calculating latency information, switches in the network need to be in PTP sync. This information is processed by the collector and may be stored in a time series database for providing per...
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