73 lines
5.0 KiB
HTML
73 lines
5.0 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="TCP/IP techniques connecting virtual Ethernet to external LANs" />
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<meta name="abstract" content="You can take advantage of virtual Ethernet on i5/OS." />
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<meta name="description" content="You can take advantage of virtual Ethernet on i5/OS." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>TCP/IP techniques connecting virtual Ethernet to external LANs</title>
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</head>
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<body id="virtethernet"><a name="virtethernet"><!-- --></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">TCP/IP techniques connecting virtual Ethernet to external LANs</h1>
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<div><p>You can take advantage of virtual Ethernet on i5/OS™.</p>
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<p>If you are using a <a href="rzai2virtethconsider.htm#virtethconsider">virtual
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Ethernet</a> network for interpartition communication, you may need to
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enable these partitions to communicate with a physical, external LAN. There
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are several ways to connect the virtual Ethernet network to an external LAN
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using different TCP/IP techniques. You need to enable the TCP/IP traffic to
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flow between the virtual Ethernet network and the external LAN. This figure
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shows a logical flow of the IP packets.</p>
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<br /><img src="rzai2504.gif" alt="This figure illustrates the flow of IP packets from Partition A through the" /><br /><p>IP traffic initiated by Partition A goes from its virtual Ethernet interface
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to the virtual Ethernet interface on Partition B. By implementing any one
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of the three TCP/IP techniques described below, you can enable the IP packets
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to continue on to the external interface and toward their destination.</p>
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<div class="p">There are three methods for connecting the virtual Ethernet and external
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LAN. Each method has nuances that make it more feasible based on your knowledge
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of TCP/IP and your environment. Choose from one of the following methods: <ul><li>Proxy ARP method</li>
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<li>Network address translation method</li>
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<li>TCP/IP routing method</li>
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</ul>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzai2proxyarp.htm">Proxy Address Resolution Protocol method</a></strong><br />
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This proxy Address Resolution Protocol (ARP) method uses transparent subnetting to associate a partition's virtual interface with an external interface. Proxy ARP function is built into the TCP/IP stack. If you have the necessary IP addresses, this approach is recommended.</li>
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<li class="ulchildlink"><strong><a href="rzai2nat.htm">Network address translation method</a></strong><br />
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You can use i5/OS packet filtering to route traffic between a partition
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and the outside network.</li>
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<li class="ulchildlink"><strong><a href="rzai2routing.htm">TCP/IP routing method</a></strong><br />
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Standard TCP/IP routing is used to route traffic to the virtual Ethernet network in the same way you define routing to any other LAN. This requires that you update routing information throughout your network.</li>
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<li class="ulchildlink"><strong><a href="rzai2virtethconsider.htm">Virtual Ethernet considerations</a></strong><br />
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You can use virtual Ethernet as an alternative to using a network card for interpartition communication.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzai2kickoff.htm" title="Your server has arrived, and you are ready to put it to use. This topic provides tools and procedures for configuring TCP/IP on i5/OS.">TCP/IP setup</a></div>
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</div>
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</div>
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</body>
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</html>
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