80 lines
5.4 KiB
HTML
80 lines
5.4 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<meta name="dc.date" scheme="iso8601" content="2005-09-13" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow"/>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<title>Integrated DHCP server</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<img src="delta.gif" alt="Start of change" /><img src="delta.gif" alt="Start of change" />
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<a name="rzahqintegratedhcpserver"></a>
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<h3 id="rzahqintegratedhcpserver">Integrated DHCP server</h3>
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<p>The iSeries™ iSCSI attached server solution provides an integrated DHCP server.
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The server is used to deploy boot parameters to the hosted system iSCSI HBA
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when the Dynamically delivered to the remote system via DHCP option is specified
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in the i5/OS™ remote system configuration object and AUTO or DHCP mode is specified
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in the hosted server iSCSI HBA.</p>
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<p>The integrated DHCP server is not a general purpose server. It is intended
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to exclusively deploy boot parameters to the hosted server iSCSI HBA. The
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server is automatically configured with the parameters provided in the remote
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system configuration when an network server description (NWSD) is varied on.</p>
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<p>The DHCP server will only respond to the hosted server's iSCSI HBA
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DHCP client. All of the iSCSI HBA DHCP client requests use an IBM® defined vendor
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id. The server is programmed to respond to requests that use the default vendor
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id. Any other requests from other devices in the network will be ignored by
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the DHCP server.</p>
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<p>Providing the MAC addresses of the hosted server iSCSI HBAs in the remote
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system configuration object is very important. In addition to the vendor id
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previously described, the integrated DHCP server uses the MAC address to properly
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deploy boot parameters. MAC address is part of the specific scope required
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to ensure proper parameter deployment.</p>
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<p>The scope provided by the vendor id and MAC address can be changed. While
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this is considered an advanced function, provisions have been put in place
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to allow the advanced and sophisticated users to more specifically configure
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this setting, when required. The default vendor id can be configured to other
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values. Configuration screens are available in the hosted server iSCSI HBA
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adapter CTRL-Q set up utility and the corresponding remote system configuration
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object. This advanced function is compliant with the RFC 2132 specification.
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For more details on advanced configurations see <a href="http://www.ibm.com/servers/eserver/iseries/integratedxseries/iscsireadme" target="_blank">iSCSI install read me first</a>
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<img src="www.gif" alt="Link outside the Information Center." /></p>
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<p>When an incoming DHCP request is received by the integrated DHCP server
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and all of the required scope is matched, the integrated DHCP server provides
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to the DHCP client the IP addresses for the boot target device. The boot target
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device is the network server host adapter (NWSH) where the boot virtual disk
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is configured. The server also provides the IP address for the initiator or
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DHCP client. The initiator is the iSCSI HBA in the hosted server that will
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be used to boot over iSCSI.</p>
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<p>In addition, the integrated DHCP server provides the globally unique iSCSI
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Qualified Names (IQNs) that represent the target and initiator devices to
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the hosted system iSCSI HBA.</p>
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<p>Both of these sets of IP addresses and IQNs are in the iSeries configuration
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objects used to define the hosted server. The target IP address is defined
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in the NWSH object. The initiator IP address and initiator IQN are defined
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in the remote system configuration object. The target IQN is automatically
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configured and defined in the NWSD object. For more information about these
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objects refer to <a href="scnwsd.htm#scnwsd">Network server description</a>.</p>
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<p>The integrated DHCP server is a key and integral component when implementing
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hot spares. The DHCP boot mode enables automatic deployment of the required
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parameters defined in the iSeries software objects, eliminating the need
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to manually configure a server when boot parameters (IP addresses and IQNs)
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change.</p><img src="deltaend.gif" alt="End of change" /><img src="deltaend.gif" alt="End of change" />
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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