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    <title>Trunking Misconfiguration Examples </title>
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<a name="wp1077000"> </a><h1 class="pTitle">
Trunking Misconfiguration Examples

</h1>
<a name="wp1077001"> </a><p class="pBody">
If you do not configure the VSANs correctly, issues with the connection may occur. For example, if you 
merge the traffic in two VSANs, both VSANs will be mismatched. The trunking protocol validates the 
VSAN interfaces at both ends of a link to avoid merging VSANs .

</p>
<a name="wp1077016"> </a><p class="pBody">
The trunking protocol detects potential VSAN merging and isolates the ports involved . 

</p>
<a name="wp1077017"> </a><p class="pBody">
The trunking protocol cannot detect merging of VSANs when a third-party switch is placed in between 
two Cisco MDS 9000 Family switches.

</p>
<a name="wp1077027"> </a><p class="pBody">
VSAN 2 and VSAN 3 are effectively merged with overlapping entries in the name server and the zone 
applications. Cisco DCNM-SAN helps detect such topologies. 

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

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