81 lines
5.7 KiB
HTML
81 lines
5.7 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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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Virtual Ethernet considerations" />
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<meta name="abstract" content="You can use virtual Ethernet as an alternative to using a network card for interpartition communication." />
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<meta name="description" content="You can use virtual Ethernet as an alternative to using a network card for interpartition communication." />
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<meta name="DC.Relation" scheme="URI" content="rzai2virtethernet.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzai2proxyarp.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzai2nat.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzai2routing.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Virtual Ethernet considerations</title>
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</head>
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<body id="virtethconsider"><a name="virtethconsider"><!-- --></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">Virtual Ethernet considerations</h1>
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<div><p>You can use virtual Ethernet as an alternative to using a network
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card for interpartition communication.</p>
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<p>Virtual Ethernet enables you to establish high-speed communication between
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logical partitions without purchasing additional hardware. For each of the
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16 ports enabled, the system creates a virtual Ethernet communications port,
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such as CMN<em>xx</em> with a resource type of 268C. Logical partitions assigned
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to the same local area network (LAN) then become available to communicate
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through that link. A physical system allows you to configure up to 16 different
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virtual local area networks. Virtual Ethernet provides the same function as
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using a 1 Gb Ethernet adapter. Token Ring or Ethernet 10 Mbps and 100 Mbps
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local area networks are not supported with virtual Ethernet.</p>
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<div class="p">Virtual Ethernet is an economical networking solution that provides substantial
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benefits: <ul><li>Economical: Potentially no extra networking hardware is required. You
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can add partitions to the server and communicate with an external LAN without
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installing extra physical LAN cards. If the current server has limited available
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card slots in which to install additional LAN cards, then using the virtual
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Ethernet offers the capability to operate LAN-attached partitions without
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the requirement to upgrade the server.</li>
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<li>Flexible: It is possible to configure a maximum of 16 distinctive connections
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enabling the configuration of selective communication paths between partitions.
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For added flexibility, the configuration model allows logical partitions to
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implement both a virtual Ethernet and physical LAN connection. This is a desirable
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feature when using the Linux<sup>®</sup> partition to host a firewall application.</li>
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<li>Fast: The virtual Ethernet emulates a 1 GB Ethernet connection and provides
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a fast and convenient communication method between partitions. This enhances
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the opportunity to integrate separate applications that run on different logical
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partitions.</li>
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<li>Versatile: Regardless of whether your partitions are running on i5/OS™ or Linux,
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they can all be connected to the same virtual Ethernet.</li>
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<li>Reduced congestion: By using the virtual Ethernet for interpartition communication,
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communication traffic is reduced on the external LAN. In the case of Ethernet,
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which is a collision-based standard, this will certainly help prevent a degradation
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of service for other LAN users.</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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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzai2virtethernet.htm" title="You can take advantage of virtual Ethernet on i5/OS.">TCP/IP techniques connecting virtual Ethernet to external LANs</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzai2proxyarp.htm" title="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.">Proxy Address Resolution Protocol method</a></div>
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<div><a href="rzai2nat.htm" title="You can use i5/OS packet filtering to route traffic between a partition and the outside network.">Network address translation method</a></div>
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<div><a href="rzai2routing.htm" title="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.">TCP/IP routing method</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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