71 lines
4.4 KiB
HTML
71 lines
4.4 KiB
HTML
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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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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Dynamic routing" />
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<meta name="abstract" content="Dynamic routing is a low-maintenance method that automatically reconfigures routing tables as your network changes." />
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<meta name="description" content="Dynamic routing is a low-maintenance method that automatically reconfigures routing tables as your network changes." />
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<title>Dynamic routing</title>
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<body id="rzajwdrwan"><a name="rzajwdrwan"><!-- --></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">Dynamic routing</h1>
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<div><p>Dynamic routing is a low-maintenance method that automatically
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reconfigures routing tables as your network changes.</p>
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<p>Dynamic routing is provided by Interior Gateway Protocols (IGPs), such
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as Routing Internet Protocol (RIP). RIP allows you to configure the hosts
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as part of a RIP network. This type of routing requires little maintenance
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and also automatically reconfigures routing tables when your network changes
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or crashes. RIPv2 was added to the iSeries™ server so you can send and receive
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RIP packets to update routes throughout your network.</p>
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<p>In the following figure, a static route is added to the central system
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(AS1) that describes the connection to the network 10.1.1.x via AS2. This
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is a static route (added by your network administrator) with route redistribution
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set to yes. This setting causes this route to be shared with other routers
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and systems so that when they have traffic for 10.1.1.x, they route the traffic
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to your central iSeries server
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(AS1). AS2 has the routed server started so that it sends and receives RIP
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information. In this example, AS1 is sending the message that AS2 has a direct
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connection to 10.1.2.x.</p>
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<br /><img src="rzajw520.gif" alt="Example of dynamic routing" /><br /><div class="section"><h4 class="sectiontitle">What's happening in this example?</h4><ul><li>AS1 receives this RIP packet from AS2 and processes it. If AS1 does not
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have a route to 10.1.2.x, it will store this route. If it does have a path
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to 10.1.2.x that is the same number of hops or fewer, it will discard this
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new route information. In this example, AS1 keeps the route data.</li>
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<li>AS1 receives information from R1 with route information to 10.1.5.x. AS1
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keeps this route information.</li>
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<li>AS1 receives information from R2 with route information to 10.1.3.x. AS1
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keeps this route information.</li>
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<li>The next time AS1 sends RIP messages, it will send information to R1 that
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describes all the connections AS1 knows about that R1 might not know about.
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AS1 sends route information about 10.1.1.x, 10.1.2.x, and 10.1.3.x. AS1 does
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not send information about 10.1.4.x to R1 because AS1 knows that R1 is connected
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to 10.1.4.x and does not need a route. Similar information is sent to R2 and
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AS3.</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="rzajwrcb.htm" title="Routing deals with what path the network traffic follows from its source to its destination and how that path is connected.">Routing connectivity methods</a></div>
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</div>
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</div>
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</body>
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