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A/V Edge - 01 - TCP Counters\- 025 - Active Sessions Exceeding Avg Bandwidth Limit\_Total

A_V_Edge___01___TCP_Counters___025___Active_Sessions_Exceeding_Avg_Bandwidth_Limit__Total___MR (Rule)

The number of active relay sessions over UDP that are exceeding bandwidth limit.

Knowledge Base article:

Summary

The number of active relay sessions over UDP that are exceeding bandwidth limit.

Causes

This error occurs when there is an unexpectedly high rate of traffic sent through the A/V Edge Server within a UDP session. These sessions will be throttled by the A/V Edge Server. This could be an indication of an attempt to misuse the A/V Edge Server.

Resolutions

Check that the profile of network traffic to the A/V Edge Server is in line with expected usage. A network level trace can be used to determine if there is unusual amount of traffic originating from a single source. If the situation persists then enable tracing to identify the participants in sessions exceeding the bandwidth limits to allow further troubleshooting of the cause.

Element properties:

TargetMicrosoft_Office_Communications_Server_2007_R2_A_V_Edge_Server
CategoryPerformanceCollection
EnabledTrue
Instance NameA/V Edge - 01 - TCP Counters
Counter Name- 025 - Active Sessions Exceeding Avg Bandwidth Limit
Frequency900
Alert GenerateFalse
RemotableTrue

Member Modules:

ID Module Type TypeId RunAs 
CollectPerfCounter DataSource System.Performance.OptimizedDataProvider Default
WriteToDB WriteAction Microsoft.SystemCenter.CollectPerformanceData Default
WriteToDW WriteAction Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData Default

Source Code:

<Rule ID="A_V_Edge___01___TCP_Counters___025___Active_Sessions_Exceeding_Avg_Bandwidth_Limit__Total___MR" Enabled="true" Target="Microsoft_Office_Communications_Server_2007_R2_A_V_Edge_Server" ConfirmDelivery="false" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>PerformanceCollection</Category>

  <DataSources>

    <DataSource ID="CollectPerfCounter" TypeID="SCPerformance!System.Performance.OptimizedDataProvider">

      <ComputerName>$Target/Host/Property[Type="SCWindowsLibrary!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>

      <CounterName>- 025 - Active Sessions Exceeding Avg Bandwidth Limit</CounterName>

      <ObjectName>A/V Edge - 01 - TCP Counters</ObjectName>

      <InstanceName>_Total</InstanceName>

      <AllInstances>false</AllInstances>

      <Frequency>900</Frequency>

      <Tolerance>5</Tolerance>

      <ToleranceType>Absolute</ToleranceType>

      <MaximumSampleSeparation>4</MaximumSampleSeparation>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="WriteToDB" TypeID="SCSystemLibrary!Microsoft.SystemCenter.CollectPerformanceData"/>

    <WriteAction ID="WriteToDW" TypeID="SCDataWarehouseLibrary!Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData"/>

  </WriteActions>

</Rule>