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    <title>About Multicast Root Switch </title>
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<a name="wp1074678"> </a><h1 class="pTitle">
About Multicast Root Switch

</h1>
<a name="wp1074679"> </a><p class="pBody">
By default, the <b style="font-weight: normal" class="cBold">native</b> (non-interop) mode uses the principal switch as the root. If you change the default, 
be sure to configure the same mode in all switches in the fabric. Otherwise, multicast traffic could 
encounter potential loop and frame-drop problems.

</p>
<a name="wp1074680"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> The operational mode can be different from the configured interop mode. The interop mode always uses 
the lowest domain switch as the root.

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

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