Interface Burst Monitoring

Junos OS Evolved Release 19.3R1 supports interface burst monitoring on Junos Telemetry. Interface burst monitoring tracks physical interfaces for bursts on Juniper Networks® QFX5220-128C Switch and Juniper Networks® QFX5220-32CD Switch. Use interface burst monitoring to help troubleshoot problems, make decisions, and adjust resources as needed.

Sampling uses millisecond granularity during the export interval (window). onfigure the export interval in the sensor with the subscription from the collector. When you install the sensor, the Packet Forwarding Engine starts a timer to poll the hardware in 30 ms through 100 ms intervals. Rates in the first export batch are "0".

The peak byte is the average of the number of bytes seen in a sampling interval. For bursts lasting less than the sampling interval, the peak byte is averaged out over the interval. Exported statistics also include the time peak bytes are detected and the direction (transmit or receive). he maximum byte rate detected among all samples in the export interval is the burst. If there are multiple bursts of the same number of bytes rate in the interval, then the first occurring burst is considered as the maximum burst and the timestamp of that burst is considered as the burst timestamp.

Data for all physical interfaces that are "UP" is exported. Aggregate interfaces are not supported.

Export interface burst statistics from the Juniper device to an outside collector by including the sensor /junos/system/linecard/bmon-sw/ in a subscription using remote procedure call (gRPC) services. Only one collector is supported with this sensor.

To provision the sensor to export data through gRPC services, use the telemetrySubscribe RPC to specify telemetry parameters. Streaming telemetry data through gRPC also requires the OpenConfig for Junos OS module.

Note:

This feature does not detect microbursts.