147 lines
8.8 KiB
HTML
147 lines
8.8 KiB
HTML
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<title>Example: Multiple TCP/IP subnets</title>
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<body id="rzakgscenario2"><a name="rzakgscenario2"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: Multiple TCP/IP subnets</h1>
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<div><p>You can learn how to set up the iSeries™ server as a DHCP server with
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two LANs connected by a DHCP-enabled router.</p>
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<div class="section"><p>This example is similar to the previous example, Simple DHCP subnet,
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except that there is now an additional TCP/IP subnet. Suppose that the office
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and data entry clients are on different floors of a office building and separated
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with a router. If the network administrator wants all of the clients to receive
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their IP information through DHCP, this situation presents some unique differences
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from a simple DHCP subnet. The following figure shows an example network layout
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for an iSeries DHCP
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server connected to two LANs using a router between the networks. The figure
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intentionally has a limited number of clients as not to become cluttered.
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A real world situation has considerably more clients on each subnet.</p>
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<div class="fignone"><span class="figcap">Figure 1. Multiple LANs connected through a router</span><br /><img src="rzakg502.gif" alt="Multiple LANs connected through a router." /><br /></div>
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<p>The router that connects the two networks must be enabled to pass
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DHCP DISCOVER packets. If it is not, the data entry clients will not be able
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to receive their IP information and access the network. Also, the DHCP policy
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needs two subnet definitions--one for the data entry and office subnets. At
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a minimum, the differences between the subnets are their IP subnets and router
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addresses. The data entry subnet needs to receive a router address of 10.1.2.2
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to communicate with the office subnet.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Planning the DHCP setup for multiple LANs</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="border" border="1" rules="all"><caption>Table 1. Global configuration options (applies to all clients served by the
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DHCP server)</caption><thead align="left"><tr><th colspan="2" valign="top" id="d0e42">Object</th>
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<th valign="top" width="43.389830508474574%" id="d0e44">Value</th>
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</tr>
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</thead>
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<tbody><tr><td rowspan="3" valign="top" width="13.220338983050848%" headers="d0e42 ">Configuration options </td>
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<td valign="top" width="43.389830508474574%" headers="d0e42 "> option 1: Subnet mask </td>
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<td valign="top" width="43.389830508474574%" headers="d0e44 "> 255.255.255.0 </td>
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</tr>
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<tr><td valign="top" width="43.389830508474574%" headers="d0e42 "> option 6: Domain name server </td>
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<td valign="top" width="43.389830508474574%" headers="d0e44 "> 10.1.1.1 </td>
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</tr>
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<tr><td valign="top" width="43.389830508474574%" headers="d0e42 "> option 15: Domain name</td>
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<td valign="top" width="43.389830508474574%" headers="d0e44 "> mycompany.com </td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e42 ">Subnet addresses not assigned by server</td>
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<td valign="top" width="43.389830508474574%" headers="d0e44 ">10.1.1.1 (Domain name server)</td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e42 ">Is the server performing DNS updates?</td>
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<td valign="top" width="43.389830508474574%" headers="d0e44 ">No</td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e42 ">Is the server supporting BOOTP clients?</td>
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<td valign="top" width="43.389830508474574%" headers="d0e44 ">No</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="border" border="1" rules="all"><caption>Table 2. Subnet for Office clients</caption><thead align="left"><tr><th colspan="2" valign="top" id="d0e88">Object</th>
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<th valign="top" width="43.09764309764309%" id="d0e90">Value</th>
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</tr>
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</thead>
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<tbody><tr><td colspan="2" valign="top" headers="d0e88 ">Subnet name</td>
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<td valign="top" width="43.09764309764309%" headers="d0e90 ">Office</td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e88 ">Addresses to manage</td>
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<td valign="top" width="43.09764309764309%" headers="d0e90 ">10.1.1.3 - 10.1.1.150</td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e88 ">Lease time</td>
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<td valign="top" width="43.09764309764309%" headers="d0e90 ">24 hours (default)</td>
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</tr>
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<tr><td rowspan="2" valign="top" width="13.804713804713806%" headers="d0e88 ">Configuration options </td>
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<td valign="top" width="43.09764309764309%" headers="d0e88 ">option 3: Router </td>
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<td valign="top" width="43.09764309764309%" headers="d0e90 ">10.1.1.2 </td>
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</tr>
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<tr><td valign="top" width="43.09764309764309%" headers="d0e88 ">inherited options</td>
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<td valign="top" width="43.09764309764309%" headers="d0e90 ">Options from Global configuration </td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e88 ">Subnet addresses not assigned by server</td>
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<td valign="top" width="43.09764309764309%" headers="d0e90 ">10.1.1.2 (Router)</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="border" border="1" rules="all"><caption>Table 3. Subnet for Data Entry clients</caption><thead align="left"><tr><th colspan="2" valign="top" id="d0e134">Object</th>
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<th valign="top" width="42.95302013422819%" id="d0e136">Value</th>
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</tr>
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</thead>
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<tbody><tr><td colspan="2" valign="top" headers="d0e134 ">Subnet name</td>
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<td valign="top" width="42.95302013422819%" headers="d0e136 ">DataEntry</td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e134 ">Addresses to manage</td>
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<td valign="top" width="42.95302013422819%" headers="d0e136 ">10.1.2.3 - 10.1.2.150</td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e134 ">Lease time</td>
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<td valign="top" width="42.95302013422819%" headers="d0e136 ">24 hours (default)</td>
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</tr>
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<tr><td rowspan="2" valign="top" width="14.093959731543624%" headers="d0e134 ">Configuration options </td>
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<td valign="top" width="42.95302013422819%" headers="d0e134 ">option 3: Router </td>
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<td valign="top" width="42.95302013422819%" headers="d0e136 ">10.1.2.2</td>
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</tr>
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<tr><td valign="top" width="42.95302013422819%" headers="d0e134 ">Inherited options</td>
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<td valign="top" width="42.95302013422819%" headers="d0e136 ">Options from Global configuration</td>
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</tr>
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<tr><td colspan="2" valign="top" headers="d0e134 ">Subnet addresses not assigned
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by server</td>
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<td valign="top" width="42.95302013422819%" headers="d0e136 ">10.1.2.2 (Router)</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakgexampleparent.htm" title="By reviewing diagrams and examples of how different networks are set up, you can determine which is the best choice for your installation.">DHCP examples</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="rzakgscenario1.htm" title="You can learn how to set up the iSeries server as a DHCP server in a simple LAN with four PC clients and a LAN-based printer.">Example: Simple DHCP subnet</a></div>
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</div>
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</div>
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</body>
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