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<h1 class="topictitle1">LAN IOA addresses</h1>
<div><p>In a Systems Network Architecture (SNA) environment, you can determine
the address for each input/output adapter (IOA).</p>
<p>You can use one of two addresses:</p>
<ul><li>The manufacturer-assigned address that is otherwise known as the burned-in
address, preset address, or universally-administered address.</li>
<li>The locally administered address.</li>
</ul>
<p>You define the locally administered address, and the system associates
it with the adapter. Using a locally administered address minimizes the reconfiguration
work when you replace the adapter.</p>
<p>For example, if you use the burned-in address of the adapter, you must
configure this address into every device that communicates with the adapter.
When you replace the adapter, you must go back to each device and reconfigure
them with the burned-in address of the new adapter. You cannot assign the
burned-in address of the replaced adapter to the new adapter.</p>
<p>You can avoid the reconfiguration work by associating a locally administered
address with the adapter and using this address in all devices that communicate
with the adapter. When you replace the adapter, associate the locally administered
address with the new adapter. Because the devices already have the locally
administered address, you do not need to re-configure them.</p>
<div class="note"><span class="notetitle">Note:</span> No two adapters can have the same address in the same network.</div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajuplanningtokenringsupport.htm" title="To make the configuration of token-ring support easier, you need to make some decisions about how to configure your connections.">Plan for token-ring support</a></div>
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