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Cisco Wireless: Ethernet single collisions Health Monitor

Jalasoft.Xian.SmartManagementPacks.CiscoWireless.EthernetSingleCollisions.1.1 (AggregateMonitor)

This monitor catches Xian events that notifies when the Ethernet single collisions if has changed its state.

Knowledge Base article:

Summary

Number of ethernet single collisions is over threshold.

The number of successfully transmitted frames that were inhibited by only one collision is above the maximum threshold configured in Xian Network Manager 2012.

Causes

Collisions are acceptable to a point, but can bring your network to a virtual standstill. They are caused by a faulty network adapter where the sensor is failing, a congested network segment, or a network loop.

Resolutions

If the adapter is faulty, replacement is the only option; isolate each adapter to see if the problem stops. With regards to a congested network, segmentation is usually the best option: use a bridge, router, or switch to reconfigure your network into segments with fewer stations. If you identify a network loop, ensure that no redundant connections to the same station have both connections active simultaneously.

Additional

Monitors the number of successfully transmitted frames on a particular interface for which transmission is inhibited by exactly one collision.

Element properties:

TargetJalasoft.Xian.Common.Elements.ThirdParty.Cisco.JsXCiscoWirelessInterfaceElement
Parent MonitorSystem.Health.PerformanceState
AlgorithmWorstOf
CategoryStateCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityMatchMonitorHealth
Alert PriorityLow
Alert Auto ResolveTrue
RemotableTrue
AccessibilityPublic
Alert Message
Ethernet single collisions Alert
{0}

Source Code:

<AggregateMonitor ID="Jalasoft.Xian.SmartManagementPacks.CiscoWireless.EthernetSingleCollisions.1.1" Accessibility="Public" Enabled="true" Target="ThirdParty_Cisco!Jalasoft.Xian.Common.Elements.ThirdParty.Cisco.JsXCiscoWirelessInterfaceElement" ParentMonitorID="SystemHealth!System.Health.PerformanceState" Remotable="true" Priority="Normal">

  <Category>StateCollection</Category>

  <AlertSettings AlertMessage="EthernetSingleCollisions_AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Low</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Params/Param[3]$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <Algorithm>WorstOf</Algorithm>

</AggregateMonitor>