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    <title>Trunk Modes </title>
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<a name="wp1073492"> </a><h1 class="pTitle">
Trunk Modes

</h1>
<a name="wp1073493"> </a><p class="pBody">
By default, trunk mode is enabled on all Fibre Channel interfaces (Mode: E, F, FL, Fx, ST, and SD) on 
non-NPV switches. On NPV switches, by default, trunk mode is disabled. You can configure trunk mode 
as on (enabled), off (disabled), or auto (automatic). The trunk mode configuration at the two ends of an 
ISL, between two switches, determine the trunking state of the link and the port modes at both ends (see 
<a href="trnk07.html#wp1073505">Table&#160;9-2</a>).

</p>
<a name="wp1073604"> </a><p class="pBodyRelative">
</p><div>
<table border="2" cellpadding="2" id="wp1073505table1073498">
  <caption><a name="wp1073505"> </a><div class="pTableTitle">
Table&#160;9-2	Trunk Mode Status Between Switches&#160;

</div>
</caption>
  <tr bgcolor="#CCCCCC" align="left" valign="middle">    <th colspan="3" rowspan="1"><a name="wp1073515"> </a><p class="pCellHeading">
Your Trunk Mode Configuration

</p>
</th>
    <th colspan="2" rowspan="1"><a name="wp1073521"> </a><p class="pCellHeading">
Resulting State and Port Mode 

</p>
</th>
</tr>
  <tr bgcolor="#CCCCCC" align="left" valign="middle">    <th><a name="wp1073525"> </a><p class="pCellHeading">
Port Type

</p>
</th>
    <th><a name="wp1073527"> </a><p class="pCellHeading">
Switch 1 

</p>
</th>
    <th><a name="wp1073529"> </a><p class="pCellHeading">
Switch 2 

</p>
</th>
    <th><a name="wp1073531"> </a><p class="pCellHeading">
Trunking State

</p>
</th>
    <th><a name="wp1073533"> </a><p class="pCellHeading">
Port Mode

</p>
</th>
</tr>
  <tr align="left" valign="top">    <td colspan="1" rowspan="3"><a name="wp1073535"> </a><p class="pBody">
E ports

</p>
</td>
    <td><a name="wp1073537"> </a><p class="pBody">
On

</p>
</td>
    <td><a name="wp1073539"> </a><p class="pBody">
Auto or on

</p>
</td>
    <td><a name="wp1073541"> </a><p class="pBody">
Trunking (EISL)

</p>
</td>
    <td><a name="wp1073543"> </a><p class="pBody">
TE port

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073547"> </a><p class="pBody">
Off

</p>
</td>
    <td><a name="wp1073549"> </a><p class="pBody">
Auto, on, or off

</p>
</td>
    <td><a name="wp1073551"> </a><p class="pBody">
No trunking (ISL) 

</p>
</td>
    <td><a name="wp1073553"> </a><p class="pBody">
E port

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073557"> </a><p class="pBody">
Auto

</p>
</td>
    <td><a name="wp1073559"> </a><p class="pBody">
Auto

</p>
</td>
    <td><a name="wp1073561"> </a><p class="pBody">
No trunking (ISL)

</p>
</td>
    <td><a name="wp1073563"> </a><p class="pBody">
E port

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073565"> </a><p class="pCellHeading">
Port Type

</p>
</td>
    <td><a name="wp1073567"> </a><p class="pCellHeading">
Core Switch 

</p>
</td>
    <td><a name="wp1073569"> </a><p class="pCellHeading">
NPV Switch

</p>
</td>
    <td><a name="wp1073571"> </a><p class="pCellHeading">
Trunking State

</p>
</td>
    <td><a name="wp1073573"> </a><p class="pCellHeading">
Link Mode

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td colspan="1" rowspan="3"><a name="wp1073575"> </a><p class="pBody">
F and NP 
ports

</p>
</td>
    <td><a name="wp1073577"> </a><p class="pBody">
On

</p>
</td>
    <td><a name="wp1073579"> </a><p class="pBody">
Auto or on

</p>
</td>
    <td><a name="wp1073581"> </a><p class="pBody">
Trunking 

</p>
</td>
    <td><a name="wp1073583"> </a><p class="pBody">
TF-TNP link

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073587"> </a><p class="pBody">
Auto

</p>
</td>
    <td><a name="wp1073589"> </a><p class="pBody">
On

</p>
</td>
    <td><a name="wp1073591"> </a><p class="pBody">
Trunking

</p>
</td>
    <td><a name="wp1073593"> </a><p class="pBody">
TF-TNP link

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073597"> </a><p class="pBody">
Off

</p>
</td>
    <td><a name="wp1073599"> </a><p class="pBody">
Auto, on, or off

</p>
</td>
    <td><a name="wp1073601"> </a><p class="pBody">
No trunking

</p>
</td>
    <td><a name="wp1073603"> </a><p class="pBody">
F-NP link

</p>
</td>
</tr>
</table>
</div>
<p class="pBodyRelative">
</p>
<a name="wp1073605"> </a><p class="pBodyAutonumRel">
<strong>Tip	&nbsp;&nbsp;&nbsp;</strong> The preferred configuration on the Cisco MDS 9000 Family switches is one side of the trunk set to auto 
and the other side set to on.

</p>
<a name="wp1073845"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> When connected to a third-party switch, the trunk mode configuration on E ports has no effect. The ISL 
is always in a trunking disabled state. In the case of F ports, if the third-party core switch ACC&#39;s physical 
FLOGI with the EVFP bit is configured, then EVFP protocol enables trunking on the link.

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

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