1. Dhcpexim.exe

Archived from groups: microsoft.public.win2000.advancedserver Hi Max, I'm by no means an expert in this subject matter of DHCP, but I'll try to assist you to the best of my ability. These two article reference links would be a good place to start with regards to setting up DHCP on a Microsoft Cluster Server (MSCS): 226796 Using WINS and DHCP with the Windows 2000 Cluster Service 325547 Support WebCast: Using WINS and DHCP on Microsoft Windows 2000 Clusters - Hope this helps, Mike Rosado Windows 2000 MCSE + MCDBA Microsoft Enterprise Platform Support Windows NT/2000/2003 Cluster Technologies When responding to posts, please 'Reply to Group' via your newsreader so that others may learn and benefit from your issue. This posting is provided 'AS IS' with no warranties, and confers no rights. Wrote in message news:78DACC5F-A1EF-4377-9ADF-77091B21DA86@microsoft.com.

I used the Dhcpexim.exe to export my dhcp scopes from Windows NT to Windows 2000 cluster but the DHCP service on cluster stop. I migrated others scopes to Windows 2000 (without cluster) and it was ok. Is there something to do on a cluster to support the migration with Dhcpexim.exe? Someone can help me?

The Windows 2000 Server Resource Kit includes many useful utilities. Dhcpexim.exe: Exports a DHCP. Windows 2000 Server Resource Kit Utilities. Mar 22, 2004 I'm trying to move DHCP from one computer to another. I've read that you could use the DHCPExIm.exe tool which is on the Windows 2000 Resource Kit.

Archived from groups: microsoft.public.win2000.advancedserver Max, As I mentioned before that I'm by no means an expert in this subject matter of DHCP, but responded to your posting then I'll try to assist you to the best of my ability. This method was suggested to another customer and works around the behavior mentioned below by removing the checkpoint data, and then allows you to re-create the scope with the desired data intact. SYMPTOMS When you try to migrate DHCP scopes from a standalone Windows 2000 environment to a Windows 2000 MSCS Cluster using either DHCPEXIM or manually by copying the service registry keys and the dhcp.mdb file all scope data is lost.

This also occurs when you try to export and import a DHCP configuration that was initially built on a Windows Cluster. CAUSE: In order to import and export a DHCP database is necessary to stop and start the DHCP service. When the service is clustered it is now owned by the cluster service, and can only be stopped using the Cluster Administrator utility.

When a service is stopped and started using the Cluster Administrator tool, MSCS uses registry checkpoints to ensure that the service restarts in the same condition as when it was taken offline. The updated scope information is being erased by MSCS registry checkpoints. Archived from groups: microsoft.public.win2000.advancedserver Mike! There was a problem with the reservations. When I imported the scopes, in DHCP snap-in it was ok but when added the DHCP Service back to the cluster the reservations was not present. The solution was import the scopes on both nodes: 1 - In Cluster Administrator, remove the DHCP Service. 2 - On the first node import the scopes.

3 - Move the resources to the other node and import the scope again. 4 - After this include the DHCP Service on the Cluster. The reservation was ok!!

LabMice Tip How to get the most out of your DHCP Servers: The easiest way to improve DHCP Server Performance is by improving Disk I/O DHCP servers usually choke on the disk read/write operations, rather than processor utilization or memory. Always use the fastest drives and controllers you can afford for DHCP servers. Use less than 1,000 scopes per Server. Every scope that resides on a DHCP server requires additional disk space for the DHCP registry and paging file. Large scopes require more disk operations and will slow your systems. Limit 10,000 clients per server.

There is no fixed limit to the number of clients that a DHCP server can accommodate, but as a general rule try to limit your DHCP servers to no more than 10,000 clients. This will give them a little breathing room when all of your clients try to log in at once. Where to start. Microsoft Knowledge Base Article: 169289 - Dynamic Host Configuration Protocol (DHCP) is a standard protocol defined by RFC 1541 (which is superseded by RFC 2131) that allows a server to dynamically distribute IP addressing and configuration information to clients. A great FAQ from Windows2000FAQ.com.

Overview of improvements and enhancements to Microsoft's DHCP service in Windows 2000. By Thomas Lee.

Microsoft Knowledge Base Article: 223413 - Ipconfig.exe is a command-line tool you can use to renew and release leases obtained from a Dynamic Host Configuration Protocol (DHCP - server, and display your IP settings. This article describes these and other Ipconfig features. Microsoft Online Seminar: Understand core concepts, and learn how best to plan and install DHCP in your Windows NT© network.19 Minutes, 09/03/98. Microsoft Online Seminar: Learn to utilize DHCP to allow your network administration to automate and centrally manage the assignment of IP addresses in your organization's network. 17 Minutes, 09/03/98 General DHCP Articles Microsoft Knowledge Base Article: 255836 - A Windows 2000 client may lose connectivity to all network resources if it receives its IP configuration by using Dynamic Host Configuration Protocol (DHCP). Earlier-version clients that use DHCP may still have access to network resources.

Microsoft Knowledge Base Article: 150565 - A DHCP scope is an administrative grouping of computers running the DHCP Client service. You create a scope for each subnet on the network to define parameters for that subnet. Microsoft Knowledge Base Article: 172408 - A Dynamic Host Configuration Protocol (DHCP) client will normally use the media access control address of its network interface card (NIC) to identify itself to a DHCP server.

Windows NT DHCP clients can also have client identifiers manually configured. Microsoft Knowledge Base Article: 158016 - The Microsoft Windows NT DHCP Service has been designed to allow a network administrator to assign a lease duration shorter than one hour for testing purposes. Always assign a lease duration longer than one hour for production systems in real work environments. Microsoft Knowledge Base Article: 222463 - If a Dynamic Host Configuration Protocol (DHCP) server is set to automatically register a Dynamic DNS (DDNS) server with client information, it passes the client information to the DNS server upon acknowledgment of the IP address reservation Microsoft Knowledge Base Article: 120932 A DHCP (Dynamic Host Configuration Protocol) server can provide IP addresses to clients spanning multiple subnets if the router that separates them can act as an RFC 1542(BOOTP) relay agent. By Mark Minasi, Windows &.NET Magazine September 1996.

This article describes how to add Novell Service Location Protocol (SLP) DHCP options to the DHCP service. You can configure the DHCP service that is included with Windows 2000 to provide DHCP options 78 and 79. Novell clients may require the. Microsoft Knowledge Base Article: 300429 - This step-by-step article describes how to build and configure a new Windows 2000 DHCP Server in a Windows 2000 Active Directory domain. The Windows 2000 DHCP service provides clients with IP addresses, and information such as the location of their default gateway, DNS servers, and WINS servers Microsoft Knowledge Base Article: 301187 - This step-by-step guide describes how to configure a new Windows 2000-based Dynamic Host Configuration Protocol (DHCP) server on a standalone server to provide centralized management of IP addresses and other TCP/IP configuration settings for network clients. Microsoft Knowledge Base Article: 196066 - DHCP manager will allow certain DHCP reservations outside the DHCP scope range but will deny if they are outside the subnet range. Several rules must apply when creating reservations.

Microsoft Knowledge Base Article: 266675 - Describes vendor classes and user classes that are defined by default in Windows 2000 Dynamic Host Configuration Protocol (DHCP) server. Microsoft Knowledge Base Article: 259786 - Definitions of the icons used in the Dynamic Host Configuration Protocol (DHCP) snap-in in Microsoft Management Console are not included in online Help or ToolTips. Microsoft Knowledge Base Article: 160699 - When Remote Access Service (RAS) uses Dynamic Host Configuration Protocol (DHCP) to obtain IP addresses for dial-in clients, only the IP address from the DHCP lease is passed to the RAS client. Other options in the DHCP scope are not. Microsoft Knowledge Base Article: 124584 - Although Windows NT provides dynamic host configuration protocol (DHCP) services, and DHCP is based on the Bootstrap protocol (BOOTP), Windows NT does not provide BOOTP services. How to Articles By John Enck, Windows NT Magazine October 1995.

Microsoft Knowledge Base Article: 285019 - This article describes how to add Novell Service Location Protocol (SLP) DHCP options to the DHCP service. Microsoft Knowledge Base Article: 303540 - This step-by-step article describes how to add users to the Dynamic Host Configuration Protocol (DHCP) Administrators group. Microsoft Knowledge Base Article: 280473 - This article describes how to configure Dynamic Host Configuration Protocol (DHCP) servers with split scopes.

Microsoft Knowledge Base Article: 313314 - The Windows 2000 DHCP server provides a Vendor Class option you can use to disable the NetBIOS over TCP/IP for DHCP client. This article describes how to do this. Microsoft Knowledge Base Article: 300429 - This step-by-step article describes how to build and configure a new Windows 2000 DHCP Server in a Windows 2000 Active Directory domain. The Windows 2000 DHCP service provides clients with IP addresses, and information such as the location of their default gateway, DNS servers, and WINS servers. Microsoft Knowledge Base Article: 301187 - This step-by-step guide describes how to configure a new Windows 2000-based Dynamic Host Configuration Protocol (DHCP) server on a standalone server to provide centralized management of IP addresses and other TCP/IP configuration settings for the client computers on a network.

Microsoft Knowledge Base Article: 261321 - The location for installing Windows Internet Name Service (WINS), Domain Name System (DNS), Dynamic Host Configuration Protocol (DHCP), and other network services has changed in Windows 2000. Microsoft Knowledge Base Article: 130642 Windows NT provides an administration utility called Dynamic Host Configuration Protocol (DHCP) Manager (Dhcpadmn.exe) that allows you to manage DHCP servers. However, Dhcpadmn.exe does not allow you to move a database from a server to another. Microsoft Knowledge Base Article: 169229.

Dhcpexim.exe

It is sometimes necessary to remove and then reinstall the DHCP Server service. This article explains how to perform this procedure and maintain your DHCP server settings. Microsoft Knowledge Base Article: 173396 This article discusses methods that may be used to recover a corrupted Dynamic Host Configuration Protocol (DHCP) database. Microsoft Knowledge Base Article: 215416 Describes how to upgrade a DHCP or WINS database from a Microsoft Windows NT 3.51 server to a Windows 2000 server.

Microsoft Knowledge Base Article: 232703 - You can now use the DHCP Relay agent with RAS to provide DHCP scope options to RAS clients. The RAS client continues to receive an IP address from the RAS server, but may use DHCPInform packets to obtain WINS addresses, DNS addresses, domain Microsoft Knowledge Base Article: 145881 - Microsoft Windows NT Server includes a utility, Jetpack.exe, that can be used to compact a Windows Internet Name Service (WINS) or Dynamic Host Configuration Protocol (DHCP) database. Microsoft recommends that you compact the WINS database whenever it approaches 30 MB.

Microsoft Knowledge Base Article: 255999 - This article describes methods you can use to change the number of IP hosts on any given subnet. Microsoft Knowledge Base Article: 255134 - Installing Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) on the same computer may allow name 'hijacking.'

Evaluate the information in this article to determine whether it applies to your environment. (updated 622000) Known Bugs and Issues The TCP/IP protocol may be complex, but it contains powerful troubleshooting tools. Source: EarthWeb (April 28, 2000) Microsoft Knowledge Base Article: 309625 - If DHCP is installed on a domain controller (DC -, the domain account operators group can modify the DHCP configuration, even though this ability should be limited to administrators and DHCP administrators. Microsoft Knowledge Base Article: 167014 - When a DHCP client is moved from one subnet to another, it may fail to obtain a valid IP address on the new subnet. Microsoft Knowledge Base Article: 261964 - After a Dynamic Host Configuration Protocol (DHCP) client lease expires, it is not immediately scavenged from the database. A grace period of four hours is added to the end of the lease to prevent against clock drift between the DHCP client and server. On a Windows 2000-based DHCP server, leases are scavenged from the database if they meet the criteria of ( ExpirationTime + 4 hours).

Microsoft Knowledge Base Article: 257600 - When you configure Windows 2000 Dynamic Host Configuration Protocol (DHCP) to update DNS zones for clients that do not support dynamic update, printers may be registered in forward-lookup zones and reverse-lookup zones using their DHCP-assigned Microsoft Knowledge Base Article: 168455 - A client connected to an Ethernet switch may not receive a renewed DHCP IP address during startup. Releasing and renewing the IP address manually works. Microsoft Knowledge Base Article: 284145 - Under certain conditions, on a scope with numerous exclusions and reservations, a Windows 2000 DHCP server may try to assign reserved addresses to non-reserved clients, and the following behavior may occur: Microsoft Knowledge Base Article: 287031 - After you use Dhcpexim.exe to move the DHCP scopes, the DHCP server does not issue internet protocol (IP) leases. Microsoft Knowledge Base Article: 289583 - DHCP option 81 (option code 0x51, or decimal 81 - which is named FQDN (fully qualified domain name - allows a client to request that the DHCP server perform DNS name registration on behalf of the client.