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    <title>Local Switching </title>
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<a name="wp1180274"> </a><h1 class="pTitle">
Local Switching

</h1>
<a name="wp1177975"> </a><p class="pBody">
Local switching can be enabled in Generation 4 modules, which allows traffic to be switched directly 
with a local crossbar when the traffic is directed from one port to another on the same line card. By using 
local switching, an extra switching step is avoided, which decreases the latency. 

</p>
<a name="wp1179217"> </a><p class="pBody">
When using local switching, note the following guidelines:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1179231"> </a><li class="pSmartList1">All ports need to be in shared mode, which usually is the default state. To place a port in shared 
mode, enter the <b class="cBold">switchport ratemode shared</b> command. 
</li>
<a name="wp1179250"> </a><li class="pSmartList1">E ports are not allowed in the module because they must be in dedicated mode. 
</li>
</ul></div>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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