61 lines
3.8 KiB
HTML
61 lines
3.8 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="General routing rules" />
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<meta name="abstract" content="These rules apply to TCP/IP in general, and to TCP/IP on your iSeries server, to help you to manage packets." />
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<meta name="description" content="These rules apply to TCP/IP in general, and to TCP/IP on your iSeries server, to help you to manage packets." />
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<meta name="DC.Relation" scheme="URI" content="rzajwkickoff.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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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzajwbasicrules" />
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<meta name="DC.Language" 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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<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>General routing rules</title>
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</head>
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<body id="rzajwbasicrules"><a name="rzajwbasicrules"><!-- --></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">General routing rules</h1>
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<div><p>These rules apply to TCP/IP in general, and to TCP/IP on your iSeries™ server,
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to help you to manage packets.</p>
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<p>You should consider these rules as you implement routing functions on your iSeries server.
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These rules will help you determine what is happening to the packets on your
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system and where they might be going. As with most rules, there are exceptions.</p>
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<ul><li>Your system does not have an IP address; only interfaces have IP addresses.<div class="note"><span class="notetitle">Note:</span> <img src="./delta.gif" alt="Start of change" />Virtual IP (connectionless) addresses are assigned to the system.<img src="./deltaend.gif" alt="End of change" /></div>
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</li>
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<li>In general, if the destination IP address is defined on your system, your
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system will process it regardless of what interface a packet comes in on.<p>The
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exception in this case is that if the address is associated with an unnumbered
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interface, or if IP NAT or filtering is active, the packet might be forwarded
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or discarded.</p>
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</li>
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<li>The IP address and mask define the address of the attached network.</li>
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<li>The route out of a system is selected based on the network address attached
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to an interface. The route selected is based on the following items:<ul><li>Route group search order: direct routes, subnetwork routes, and then default
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routes.</li>
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<li>Within a group, the route with the most specific subnet mask is chosen.</li>
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<li>Equally specific routes are subject to list order or load-balancing techniques.</li>
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<li>Routes can be added manually or dynamically by the system.</li>
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</ul>
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</li>
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</ul>
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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="rzajwkickoff.htm" title="Are you looking for better ways to route and balance the TCP/IP traffic of your iSeries server?">TCP/IP routing and workload balancing</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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