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<a name="wp1072755"> </a><h1 class="pTitle">
TE Port

</h1>
<a name="wp1072756"> </a><p class="pBody">
In trunking E port (TE port) mode, an interface functions as a trunking expansion port. It may be 
connected to another TE port to create an extended ISL (EISL) between two switches. TE ports are 
specific to Cisco MDS 9000 Family switches. They expand the functionality of E ports to support the 
following:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1072758"> </a><li class="pSmartList1">VSAN trunking
</li>
<a name="wp1072759"> </a><li class="pSmartList1">Transport quality of service (QoS) parameters
</li>
<a name="wp1072760"> </a><li class="pSmartList1">Fibre Channel trace (fctrace) feature
</li>
</ul></div>
<a name="wp1072761"> </a><p class="pBody">
In TE port mode, all frames are transmitted in EISL frame format, which contains VSAN information. 
Interconnected switches use the VSAN ID to multiplex traffic from one or more VSANs across the same 
physical link. This feature is referred to as trunking in the Cisco MDS 9000 Family switches (see 
<a href="trnk01.html">&quot;Configuring Trunking&quot;</a>). TE ports support class 2, class 3, and class F service.

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

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