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Mediation server service - Major proxy peer connectivity failure

Microsoft.LS.2013.Monitoring.UnitMonitor.PairedEvent.MediationServer.MEDIATIONSERVER_MAJOR_PROXY_PEER_CONNECTIVITY_FAILURE_ALARM (UnitMonitor)

Knowledge Base article:

Summary

The Mediation Server service has encountered a major connectivity problem with the Front End.

Causes

MEDIATIONSERVER_PROXY_OPTIONS_FAILED (Event ID: 25053) was recorded 5 times. Check other MOM alerts for more details. The MEDIATIONSERVER_PROXY_IP_NOT_AVAILABLE (Event ID: 25072), MEDIATIONSERVER_PROXY_TLS_NEGOTIATION_FAILED (Event ID: 25071) are examples of events that signal connectivity error conditions with the Trunk peer.

Resolutions

If the failure is MEDIATIONSERVER_PROXY_IP_NOT_AVAILABLE (Event ID: 25072), make sure that the correct listening IP and port for the Front End have been configured in the PSTN Trunk object in management store and that the Trunk is up and running and able to accept incoming connections from the Mediation Server. If the failure is MEDIATIONSERVER_PROXY_TLS_NEGOTIATION_FAILED (Event ID: 25071), make sure that both the Mediation Server and the Front End are configured for TLS and that the CA for the Trunk's certificate is the trusted certificate path on the Mediation Server and the CA for the Mediation Server's certificate is in the trusted certificate path on the Front End.

Element properties:

TargetMicrosoft.LS.2013.Component.MediationServer
Parent MonitorSystem.Health.AvailabilityState
CategoryAvailabilityHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.LS.2013.MonitorType.PairedEvent.Simple
RemotableTrue
AccessibilityPublic
Alert Message
[LYNC] The Mediation Server service has encountered a major connectivity problem with the Front End.
{0}

Please see the 'Product Knowledge' and the 'Alert Context' tab on Alert Properties view for more information.
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.LS.2013.Monitoring.UnitMonitor.PairedEvent.MediationServer.MEDIATIONSERVER_MAJOR_PROXY_PEER_CONNECTIVITY_FAILURE_ALARM" Accessibility="Public" Enabled="true" Target="Microsoft.LS.2013.Component.MediationServer" ParentMonitorID="Health!System.Health.AvailabilityState" Remotable="true" Priority="Normal" TypeID="Microsoft.LS.2013.MonitorType.PairedEvent.Simple" ConfirmDelivery="true">

  <Category>AvailabilityHealth</Category>

  <AlertSettings AlertMessage="Alert_The_Mediation_Server_service_has_encountered_a_major_connectivity_problem_with_the_Front_End.">

    <AlertOnState>Error</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Error</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/EventDescription$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="Microsoft.LS.2013.Monitoring.UnitMonitor.PairedEvent.MediationServer.MEDIATIONSERVER_MAJOR_PROXY_PEER_CONNECTIVITY_FAILURE_ALARM.Success" MonitorTypeStateID="SuccessEventRaised" HealthState="Success"/>

    <OperationalState ID="Microsoft.LS.2013.Monitoring.UnitMonitor.PairedEvent.MediationServer.MEDIATIONSERVER_MAJOR_PROXY_PEER_CONNECTIVITY_FAILURE_ALARM.Error" MonitorTypeStateID="ErrorEventRaised" HealthState="Error"/>

  </OperationalStates>

  <Configuration>

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

    <LogName>Lync Server</LogName>

    <SuccessExpression>

      <Or>

        <Expression>

          <And>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

                  <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="UnsignedInteger">25066</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

                  <XPathQuery Type="String">PublisherName</XPathQuery>

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="String">LS Mediation Server</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

          </And>

        </Expression>

        <Expression>

          <And>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

                  <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="UnsignedInteger">25002</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

                  <XPathQuery Type="String">PublisherName</XPathQuery>

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="String">LS Mediation Server</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

          </And>

        </Expression>

      </Or>

    </SuccessExpression>

    <ErrorExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">25065</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">PublisherName</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">LS Mediation Server</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </ErrorExpression>

  </Configuration>

</UnitMonitor>