79 lines
5.0 KiB
HTML
79 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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<head>
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Duplicate route-based load balancing" />
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<meta name="abstract" content="You can learn about outbound workload balancing across multiple interfaces." />
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<meta name="description" content="You can learn about outbound workload balancing across multiple interfaces." />
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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="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Duplicate route-based load balancing</title>
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</head>
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<body id="rzajwdbrr"><a name="rzajwdbrr"><!-- --></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">Duplicate route-based load balancing</h1>
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<div><p>You can learn about outbound workload balancing across multiple
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interfaces.</p>
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<p>You can use duplicate route-based load balancing for outbound workload
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balancing across multiple interfaces. This is a connection-based solution
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that has more flexibility than DNS-based load balancing, but it is not active
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for local clients. The advantages of using this type of load balancing are
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that it is a total iSeries™ server solution, it has more flexibility
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than DNS, and it is good for applications where most of the traffic is outbound,
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like HTTP and Telnet. The disadvantages to it are that it is a connection-based
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solution (not a load-based solution), it is not active for local clients,
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and it has no effect on inbound requests.</p>
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<p>In the following example, three adapters on your system are all connected
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to the same LAN segment. You have set up one of the adapters as an inbound
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line only and set up the other two adapters as outbound. Local clients continue
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to work the same way as in the past. That is to say the outbound interface
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is the same as the inbound interface. Remember that a local client is any
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system that does not require a router to reach it. This can be a very large
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network if switches were used rather than routers.</p>
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<br /><img src="rzajw511.gif" alt="Duplicate route-based load balancing" /><br /><div class="section"><h4 class="sectiontitle">Where do I go to configure this?</h4><p>You can configure
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this in the Add TCP/IP Route command line and also in the iSeries Navigator
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interface. One is called duplicate route priority, the other is called the
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preferred binding interface. If the value for duplicate route priority is
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left at the default value of 5, nothing happens. If a value greater than 5
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is set, then connections are distributed between routes at the same priority.
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The preferred binding interface is used to bind a route to a specific interface
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by IP address rather than the first one the system sees.</p>
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<p>In the preceding
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example, there is an "inbound" adapter (10.6.7.3) with a duplicate route priority
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of 6. The other two adapters are configured with a duplicate route priority
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of 8. Because the duplicate route priority on one adapter is 6, it will not
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be selected for an outbound connection unless all the single route priority
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interfaces of 8 are down.</p>
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<p>You should put all the outbound interfaces
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at the same priority. If you put some at one value and some at another value,
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only the highest value interfaces will be used.</p>
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<p>Notice that the DNS
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is pointing to the 10.6.7.3 interface, making it the inbound interface. Even
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if you decide not to use duplicate route priority, you should always define
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a default route out of the system on each interface by using the preferred
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binding interface parameter.</p>
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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="rzajwloadbasics.htm" title="Workload balancing is redistributing network traffic and workload of heavily accessed machines across multiple processors, multiple interface adapters, or multiple host servers.">TCP/IP workload balancing methods</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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