# Configuring DHCP to support Legacy OSD

> Configure DHCP so OS Deployment with ciBoot works in a legacy BIOS boot scenario.

Source: https://docs.capaone.com/capainstaller/the-capainstaller-console/os-deployment/how-to-use-osd/configuring-dhcp-to-support-legacy-osd/  
Product: CapaInstaller — a separate CapaSystems product; do not apply this page to any other.

# **Introduction**

The following information is the description of how to configure DHCP to support OS Deployment with ciBoot in a Legacy BIOS boot scenario.

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  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| Settings for ciBoot              | If the ciBoot service is running on the machine providing DHCP services, the following options must be set under Scope Options on the DHCP Server.   Option 60 Must specify the value PXEClient (the value is case-sensitive)   Microsoft does not provide option 60 by default in the DHCP setup, see below for instructions to create the value on a Microsoft DHCP server. <br/><br/><details><br/><summary>How to configure Option 60</summary><br/><br/><table class="wrapped confluenceTable"><tbody><tr><td class="confluenceTd"><p><strong>Step</strong></p></td><td class="confluenceTd"><p><strong>Action</strong></p></td></tr><tr><td class="confluenceTd"><p>1</p></td><td class="confluenceTd"><p>Open the DHCP management console</p></td></tr><tr><td class="confluenceTd"><p>2</p></td><td class="confluenceTd"><div class="content-wrapper"><p>Right click the server node and select "Set Predefined Options..." and the follow windows appears.<br class="atl-forced-newline"/> <br class="atl-forced-newline"/><span class="confluence-embedded-file-wrapper">![dhcpoptions60-1.gif](/attachments/capainstaller/20342553806-dhcpoptions60-1.gif)</span></p></div></td></tr><tr><td class="confluenceTd"><p>3</p></td><td class="confluenceTd"><div class="content-wrapper"><p>Click Add... to open the following window<br class="atl-forced-newline"/> <br class="atl-forced-newline"/><span class="confluence-embedded-file-wrapper">![dhcpoptions60-2.gif](/attachments/capainstaller/20342553806-dhcpoptions60-2.gif)</span><br class="atl-forced-newline"/> <br class="atl-forced-newline"/>Specify the name, Data type and Code as shown.</p></div></td></tr><tr><td class="confluenceTd"><p>4</p></td><td class="confluenceTd"><p>Click OK to create the new Option Type.</p></td></tr><tr><td class="confluenceTd"><p>5</p></td><td class="confluenceTd"><div class="content-wrapper"><p>Set the default value of the new Option Type to "PXEClient"<br class="atl-forced-newline"/> <br class="atl-forced-newline"/><span class="confluence-embedded-file-wrapper">![dhcpoptions60-3.gif](/attachments/capainstaller/20342553806-dhcpoptions60-3.gif)</span></p></div></td></tr><tr><td class="confluenceTd"><p>6</p></td><td class="confluenceTd"><p>Click OK to save new Predefined Option</p></td></tr><tr><td class="confluenceTd"><p>7</p></td><td class="confluenceTd"><div class="content-wrapper"><p>Option 60 is now available as both server option and scope option<br class="atl-forced-newline"/> <br class="atl-forced-newline"/><span class="confluence-embedded-file-wrapper">![dhcpoptions60-4.gif](/attachments/capainstaller/20342553806-dhcpoptions60-4.gif)</span></p></div></td></tr></tbody></table><br/><br/></details> |
| Settings TFTPD service           | To boot a client via PXE successfully, the following options must be set under Scope Options on the DHCP Server. **Option 66** Must point to a server having a TFTPD service available **Option 67** Must point to the boot image to load, in most cases this would point to **\cipcc.0**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               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| Additional options used by OSD   | **Options 5** and **6** should also be specified to ensure functional DNS service in WinPE, otherwise the client can experience problems with locating the server. If **option 15** is not defined a dns surfix may be required for the network access credentials to work correctly. **Username=installuser@domain.local** Using the oldschool syntax **domain\installuser** will mostly not work in WinPE unless a running WINS service is available. Use **option 44** to add a WINS server to the DHCP options.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         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| DHCP/PXE models supported by OSD | Depending on the infrastructure provided and the availability and placement of DHCP servers, there a number scenarios to use when building DHCP/PXE environments. **One DHCP one PXE** The simple model where the DHCP doubles as the PXE server or simply refers to the PXE server by using 66 **Many DHCP one PXE** Point all DHCP server to the IP of the server, OSD will automatically use the server address provided by DHCP **One DHCP many PXE** To use one PXE server from different DHCP servers or scopes, use option 66 to refer client to the server. \*Select PXE server manually from a list\* To manually select from a list of available PXE servers, built a number of copies of boot.wim and add additional menu linies to the cipcc.cfg file, each boot.wim should point to a specific servername in OSDLoader.ini.                                                                                                                                                            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