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<a name="wp1073325"> </a><h1 class="pTitle">
Trunking Protocols

</h1>
<a name="wp1073326"> </a><p class="pBody">
The trunking protocol is important for trunking operations on the ports. The protocols enable the 
following activities:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1073327"> </a><li class="pSmartList1">Dynamic negotiation of operational trunk mode.
</li>
<a name="wp1073328"> </a><li class="pSmartList1">Selection of a common set of trunk-allowed VSANs. 
</li>
<a name="wp1073329"> </a><li class="pSmartList1">Detection of a VSAN mismatch across an ISL.
</li>
</ul></div>
<a name="wp1073333"> </a><p class="pBody">
<a href="trnk06.html#wp1073337">Table&#160;9-1</a> specifies the protocols used for trunking and channeling.

</p>
<a name="wp1073371"> </a><p class="pBodyRelative">
</p><div>
<table border="2" cellpadding="2" id="wp1073337table1073334">
  <caption><a name="wp1073337"> </a><div class="pTableTitle">
Table&#160;9-1	Supported Trunking Protocols

</div>
</caption>
  <tr bgcolor="#CCCCCC" align="left" valign="middle">    <th><a name="wp1073341"> </a><p class="pCellHeading">
Trunk Link

</p>
</th>
    <th><a name="wp1073343"> </a><p class="pCellHeading">
Default

</p>
</th>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073345"> </a><p class="pBody">
TE-TE port link

</p>
</td>
    <td><a name="wp1073347"> </a><p class="pBody">
Cisco EPP (PTP)

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073352"> </a><p class="pBody">
TF-TN port link<a href="#wp1105783"><sup class="Footnote">1</sup></a>

</p>
</td>
    <td><a name="wp1073354"> </a><p class="pBody">
FC-LS Rev 1.62 EVFP

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073356"> </a><p class="pBody">
TF-TNP port link

</p>
</td>
    <td><a name="wp1073358"> </a><p class="pBody">
Cisco EPP (PTP)

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073360"> </a><p class="pBody">
E or F PortChannel

</p>
</td>
    <td><a name="wp1073362"> </a><p class="pBody">
Cisco EPP (PCP)

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073364"> </a><p class="pBody">
TF Port Channel

</p>
</td>
    <td><a name="wp1073366"> </a><p class="pBody">
Cisco EPP (PTP and PCP)

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073368"> </a><p class="pBody">
Third-party TF-TNP port link<sup class="cSuperscript">1
</sup>
</p>
</td>
    <td><a name="wp1073370"> </a><p class="pBody">
FC-LS Rev 1.62 EVFP 

</p>
</td>
</tr>
</table>

<table>
  <tr>
    <td><a name="wp1105783"> </a><p class="pTableFootnote">
<a href="#wp1073352"><sup class="Footnote">1</sup></a>These features are not currently supported.

</p>
</td>
  </tr>
</table>
</div>
<p class="pBodyRelative">
</p>
<a name="wp1073373"> </a><p class="pBody">
By default, the trunking protocol is enabled on E ports and disabled on F ports. If the trunking protocol 
is disabled on a switch, no port on that switch can apply new trunk configurations. Existing trunk 
configurations are not affected. The TE port continues to function in trunk mode, but only supports 
traffic in VSANs that it negotiated with previously (when the trunking protocol was enabled). Also, other 
switches that are directly connected to this switch are similarly affected on the connected interfaces. In 
some cases, you may need to merge traffic from different port VSANs across a non-trunking ISL. If so, 
disable the trunking protocol. 

</p>
<a name="wp1073374"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> We recommend that both ends of a trunking link belong to the same port VSAN. On certain switches or 
fabric switches where the port VSANs are different, one end returns an error and the other end is not 
connected.

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

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