Cisco AVC: Application Flows with QoS Queue Packet Drops

Rule ID

PH_Rule_Perf_AVC_2

Default Status

Disabled

Description

Detects QoS queue packet drops as reported by Cisco AVC. Queue drops can affect one or more flows mapped to the affected Queue

Severity

MITRE ATT&CK® Tactics

Application

MITRE ATT&CK® Techniques

No Technique Specified

Impacts

Application

Data Source

Cisco Application Visibility and Control (AVC) logs via Netflow V9

Detection

Correlation

Remediation Guidance

No remediation guidance specified

Time Window

If the following pattern or patterns match an ingested event within the given time window in seconds, trigger an incident.

600 seconds

Trigger Conditions

If the following defined pattern/s occur within a 600 second time window.

AlertQoSDrop

SubPattern Definitions

SubPattern Name: AlertQoSDrop

This is the named definition of the event query, this is important if multiple subpatterns are defined to distinguish them.

SubPattern Query

This is the query logic that matches incoming events

(eventType = "IOS-AVC-NETFLOW" OR eventType = "Cisco-WLC-AVC-NETFLOW") AND qosQueueDrops >= 1

Group by Attributes

This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID

qosClassHierarchyNameList, qosClassHierarchyIdList, nbarApplicationId, appName, appCategory, appSubcategory, appGroupName, ipProto, srcIpAddr, destIpAddr, destIpPort

Aggregate Constraint

This is most typically a numerical constraint that defines when the rule should trigger an incident

COUNT(*) >= 1

Incident Attribute Mapping

This section defines which fields in matching raw events should be mapped to the incident attributes in the resulting incident.

The available raw event attributes to map are limited to the group by attributes and the aggregate event constraint fields for each subpattern

 qosClassHierarchyNameList = AlertQoSDrop.qosClassHierarchyNameList,
 qosClassHierarchyIdList = AlertQoSDrop.qosClassHierarchyIdList,
 nbarApplicationId = AlertQoSDrop.nbarApplicationId,
 appName = AlertQoSDrop.appName,
 appCategory = AlertQoSDrop.appCategory,
 appSubcategory = AlertQoSDrop.appSubcategory,
 appGroupName = AlertQoSDrop.appGroupName,
 ipProto = AlertQoSDrop.ipProto,
 srcIpAddr = AlertQoSDrop.srcIpAddr,
 destIpAddr = AlertQoSDrop.destIpAddr

FortiSIEM Rules