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    <title>Forcing an Interface Addition </title>
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<a name="wp1074393"> </a><h1 class="pTitle">
Forcing an Interface Addition

</h1>
<a name="wp1074411"> </a><p class="pBody">
You can force the port configuration to be overwritten by the PortChannel. In this case, the interface is 
added to a PortChannel.

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1074412"> </a><li class="pSmartList1">If you use the default ON mode to avoid inconsistent states across switches and to maintain 
consistency across switches, then the ports shut down. You must explicitly enable those ports again.
</li>
<a name="wp1074413"> </a><li class="pSmartList1">If you use the ACTIVE mode, then the PortChannel ports automatically recover from the addition.
</li>
</ul></div>
<a name="wp1074414"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> When PortChannels are created from within an interface, the <b class="cBold">force</b> option cannot be used.

</p>
<a name="wp1074415"> </a><p class="pBody">
After the members are forcefully added, regardless of the mode (ACTIVE and ON) used, the ports at 
either end are gracefully brought down, indicating that no frames are lost when the interface is going 
down (see the <a href="pc21.html">&quot;Generation 1 PortChannel Limitations&quot; topic</a>).

</p>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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