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Interface Flapping (Fabric Interfaces) Probe

Purpose

This probe determines if fabric interfaces are flapping. A given interface (considering only fabric interfaces) is considered to be flapping if it transitions state more than "Threshold" times over the last "Duration". Such flapping will cause an anomaly to be raised. If more-than "Max Flapping Interfaces Percentage" percent of interfaces on a given device are flapping, an anomaly will be raised for that device. Finally, the last "Anomaly History Count" anomaly state-changes are stored for observation.

Source Processor
leaf fab int status (Service Data Collector)

Purpose: wires in interface status telemetry for all fabric interfaces on the leafs.

Output Stage: leaf_if_status

Set of operational states ("up" or "down"). Each set member corresponds to a leaf fabric interface and has the following keys to identify it: system_id (id of the leaf system, usually serial number), interface (name of the interface).

Additional Processor(s)
leaf fabric interface status history (Accumulate)

Purpose: create recent history time series for each interface status In terms of the number of samples, the time series will hold the smaller of: 1024 samples or samples collected during the last 'total_duration' seconds (facade parameter).

Input Stage: leaf_if_status

Output Stage: leaf_fab_int_status_accumulate

Set of interface status time series (for each spine facing interface on each leaf). Each set member has the following keys to identify it: system_id (id of the leaf system, usually serial number), interface (name of the interface).

leaf fabric interface flapping (Range)

Purpose: Count the number of state changes in the leaf_fab_int_status_accumulate ("up" to "down" and "down" to "up"). If the count is higher than 'threshold' facade parameter return "true", otherwise "false".

Input Stage: leaf_fab_int_status_accumulate

Output Stage: if_status_flapping

Set of statuses (for each spine facing interface on each leaf), indicating if the interface has been flapping or not. Each set member has the following keys to identify it: system_id (id of the leaf system, usually serial number), interface (name of the interface).

percentage flapping per device interfaces (MatchPercentage)

Input Stage: if_status_flapping

Output Stage: flapping_fab_int_perc

system anomalous flapping (Range)

Input Stage: flapping_fab_int_perc

Output Stage: system_flapping

Set of statuses for each leaf, indicting if the leaf has higher then acceptable percentage of flapping interfaces. Each set member has the following key to identify it: system_id (id of the leaf system, usually serial number).

For more information about this probe, from the blueprint, navigate to Analytics > Probes, click Create Probe, then select Instantiate Predefined Probe from the drop-down list. Select the probe from the Predefined Probe drop-down list to see details specific to the probe.