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<a name="wp1072768"> </a><h1 class="pTitle">
TF Port

</h1>
<a name="wp1072769"> </a><p class="pBody">
In trunking F port (TF port) mode, an interface functions as a trunking expansion port. It may be 
connected to another trunked N port (TN port) or trunked NP port (TNP port) to create a link between a 
core switch and an NPV switch or an HBA to carry tagged frames. TF ports are specific to Cisco MDS 
9000 Family switches. They expand the functionality of F ports to support VSAN trunking.

</p>
<a name="wp1072771"> </a><p class="pBody">
In TF 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 (see <a href="trnk01.html">&quot;Configuring 
Trunking&quot;</a>). TF 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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