A/V Edge - 00 - UDP Counters\- 021 - Packets Dropped/sec\_Total

A_V_Edge_00_UDP_Counters_021_Packets_Dropped_sec__Total_300__MR (UnitMonitor)

A/V Edge - 00 - UDP Counters\- 021 - Packets Dropped/sec\_Total perf counter exceeded specified threshold. Current value is {0}

Knowledge Base article:

Summary

The per-second rate of packets over UDP dropped by the relay.

Causes

This error occurs when an unexpectedly high rate of UDP packets is received at the A/V Edge Server causing some packets to be discarded. This could be the result of system overload or 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. If the traffic exceeds 250 Mbps per interface then increase the receive and transmit buffer size on the associate Network Interface Cards to three times the default values. If the cause is general system overload then increase capacity of the deployed A/V Edge Server function. 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 check the network source of sessions exceeding the bandwidth limits to allow further troubleshooting of the cause.

Element properties:

Target

Microsoft_Office_Communications_Server_2007_R2_A_V_Edge_Server

Parent Monitor

System.Health.PerformanceState

Category

PerformanceHealth

Enabled

True

Instance Name

A/V Edge - 00 - UDP Counters

Counter Name

- 021 - Packets Dropped/sec

Frequency

900

Alert Generate

True

Alert Severity

Warning

Alert Priority

Normal

Alert Auto Resolve

True

Monitor Type

System.Performance.ThresholdMonitorType

Remotable

True

Accessibility

Public

Alert Message

A/V Edge - 00 - UDP Counters\- 021 - Packets Dropped/sec\_Total - The per-second rate of packets over UDP dropped by the relay.

RunAs

Default

Source Code:

<UnitMonitor ID="A_V_Edge___00___UDP_Counters___021___Packets_Dropped_sec__Total_300__MR" Accessibility="Public" Enabled="true" Target="Microsoft_Office_Communications_Server_2007_R2_A_V_Edge_Server" ParentMonitorID="SCHealth!System.Health.PerformanceState" Remotable="true" Priority="Normal" TypeID="SCPerformance!System.Performance.ThresholdMonitorType" ConfirmDelivery="false">

  <Category>PerformanceHealth</Category>

  <AlertSettings AlertMessage="A_V_Edge___00___UDP_Counters___021___Packets_Dropped_sec__Total_____The_per_second_rate_of_packets_over_UDP_dropped_by_the_relay_">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Warning</AlertSeverity>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="A_V_Edge___00___UDP_Counters___021___Packets_Dropped_sec__Total_300__MR_OverThreshold" MonitorTypeStateID="OverThreshold" HealthState="Warning"/>

    <OperationalState ID="A_V_Edge___00___UDP_Counters___021___Packets_Dropped_sec__Total_300__MR_UnderThresold" MonitorTypeStateID="UnderThreshold" HealthState="Success"/>

  </OperationalStates>

  <Configuration>

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

    <CounterName>- 021 - Packets Dropped/sec</CounterName>

    <ObjectName>A/V Edge - 00 - UDP Counters</ObjectName>

    <InstanceName>_Total</InstanceName>

    <AllInstances>false</AllInstances>

    <Frequency>900</Frequency>

    <Threshold>300</Threshold>

  </Configuration>

</UnitMonitor>

A/V Edge - 00 - UDP Counters\- 021 - Packets Dropped/sec\_Total