If the DHCP server database becomes corrupted or is lost, recovery is possible by replacing the server database file (Dhcp.mdb), located in the %SystemRoot%\System32\Dhcp folder, with a backup copy of the same file.
If DHCP Manager was used previously to perform a backup, you can obtain the backup copy of the server database file located in the %SystemRoot%\System32\Dhcp\Backup folder. You can also restore the Dhcp.mdb file from a tape backup or other backup media.
To perform these procedures, you must be a member of the Administrators group, or you must have been delegated the appropriate authority.
To restore a backup copy of the DHCP database:
Click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as Administrator.
Type net stop dhcpserver, and then press ENTER.
Type md c:\olddhcp, and then press ENTER.
Type move %SystemRoot%\system32\DHCP\*.* c:\olddhcp, and then press ENTER.
Type del %SystemRoot%\system32\DHCP\Dhcp.md, and then press ENTER.
Type copy %SystemRoot%\system32\dhcp\backup\jet\new\dhcp.mdb %SystemRoot%\system32\dhcp\dhcp.mdb, and then press ENTER.
Type net start dhcpserver, and then press ENTER.
Target | Microsoft.Windows.DHCPServer.Library.Database | ||
Category | EventCollection | ||
Enabled | True | ||
Alert Generate | True | ||
Alert Severity | Warning | ||
Alert Priority | Normal | ||
Remotable | True | ||
Alert Message |
| ||
Event Log | System |
ID | Module Type | TypeId | RunAs |
---|---|---|---|
DS | DataSource | Microsoft.Windows.EventProvider | Microsoft.Windows.DHCPServer.Library.ActionAccount |
GenerateAlert | WriteAction | System.Health.GenerateAlert | Default |
WriteToDB | WriteAction | Microsoft.SystemCenter.CollectEvent | Default |
WriteToDW | WriteAction | Microsoft.SystemCenter.DataWarehouse.PublishEventData | Default |
<Rule ID="Microsoft.Windows.DHCPServer.Library.Database.DBIntegrity.Warning.Rule" Enabled="true" Target="Microsoft.Windows.DHCPServer.Library.Database" ConfirmDelivery="false" Remotable="true" Priority="Normal" DiscardLevel="100">
<Category>EventCollection</Category>
<DataSources>
<DataSource ID="DS" RunAs="Microsoft.Windows.DHCPServer.Library.ActionAccount" TypeID="Windows!Microsoft.Windows.EventProvider">
<ComputerName>$Target/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/PrincipalName$</ComputerName>
<LogName>System</LogName>
<Expression>
<And>
<Expression>
<Or>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">Microsoft-Windows-DHCP-Server</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">DHCPServer</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</Or>
</Expression>
<Expression>
<Or>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">1010</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">1014</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">1015</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</Or>
</Expression>
</And>
</Expression>
</DataSource>
</DataSources>
<WriteActions>
<WriteAction ID="WriteToDB" TypeID="SC!Microsoft.SystemCenter.CollectEvent"/>
<WriteAction ID="WriteToDW" TypeID="SCDW!Microsoft.SystemCenter.DataWarehouse.PublishEventData"/>
<WriteAction ID="GenerateAlert" TypeID="Health!System.Health.GenerateAlert">
<Priority>1</Priority>
<Severity>1</Severity>
<AlertMessageId>$MPElement[Name="Microsoft.Windows.DHCPServer.Library.Database.DBIntegrity.Warning.Rule.AlertMessage"]$</AlertMessageId>
<AlertParameters>
<AlertParameter1>$Data/EventDescription$</AlertParameter1>
</AlertParameters>
<Suppression>
<SuppressionValue>$Target/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/PrincipalName$</SuppressionValue>
</Suppression>
</WriteAction>
</WriteActions>
</Rule>