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A network that is load balanced has a Virtual IP but this Virtual IP belongs to another network

Microsoft.ISAServer.2006.A_network_that_is_load_balanced_has_a_Virtual_IP_but_this_Virtual_IP_belongs_to_another_network.Rule (Rule)

This Rule generates alerts when A network that is load balanced has a Virtual IP but this Virtual IP belongs to another network

Knowledge Base article:

Summary

The Firewall service generates this alert when it detects that the Virtual IP (VIP) configured for one network belongs to the range of another network.

The VIP chosen for the load-balanced network should belong to the address range of this network.

NLB is not functional if this error occurs, but the traffic may not pass through ISA Server as expected.

Causes

The Firewall service may encounter the illegal configuration describe above for one of the following reasons:

Resolutions

Change the VIP to an address in the range of the configured network.

External

For more information about using NLB in ISA Server, see the related document at the Microsoft TechNet Web site .

Element properties:

TargetMicrosoft.ISAServer.2006.NLB.ServerRole
CategoryEventCollection
EnabledTrue
Alert GenerateFalse
RemotableTrue

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.ISAServer.2006.Rule.AlertGenerate.DS Default
WA WriteAction Microsoft.ISAServer.2006.Rule.AlertGenerate.WA Default

Source Code:

<Rule ID="Microsoft.ISAServer.2006.A_network_that_is_load_balanced_has_a_Virtual_IP_but_this_Virtual_IP_belongs_to_another_network.Rule" Enabled="onEssentialMonitoring" Target="Microsoft.ISAServer.2006.NLB.ServerRole" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="Microsoft.ISAServer.2006.Rule.AlertGenerate.DS">

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

      <LogName>Application</LogName>

      <EventsPattern>^(21234)$</EventsPattern>

      <EventType>1</EventType>

      <SourcePattern>[Microsoft Firewall]|[Microsoft ISA Server Control]</SourcePattern>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="WA" TypeID="Microsoft.ISAServer.2006.Rule.AlertGenerate.WA">

      <AlertMessageId>$MPElement[Name="Microsoft.ISAServer.2006.A_network_that_is_load_balanced_has_a_Virtual_IP_but_this_Virtual_IP_belongs_to_another_network.AlertMessage"]$</AlertMessageId>

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

      <Priority>1</Priority>

      <Severity>2</Severity>

    </WriteAction>

  </WriteActions>

</Rule>