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    <title>Enabling the Persistent FC ID Feature </title>
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<a name="wp1544502"> </a><h1 class="pTitle">
Enabling the Persistent FC ID Feature

</h1>
<a name="wp1536366"> </a><p class="pBody">
If you connect to the switch from an AIX or HP-UX host, be sure to enable the persistent FC ID feature 
in the VSAN that connects these hosts.

</p>
<a name="wp1536435"> </a><p class="pBody">
A persistent FC ID assigned to an F port can be moved across interfaces and can continue to maintain 
the same persistent FC ID. 

</p>
<a name="wp1527415"> </a><h2 class="pHeading2">
Restrictions
</h2>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1527615"> </a><li class="pSmartList1">FC IDs are enabled by default. This change of default behavior from releases prior to Cisco MDS 
SAN-OS Release 2.0(1b) prevents FC IDs from being changed after a reboot. You can disable this 
option for each VSAN. 
</li>
<a name="wp1527618"> </a><li class="pSmartList1">Persistent FC IDs with loop-attached devices (FL ports) need to remain connected to the same port 
in which they were configured.
</li>
<a name="wp1527619"> </a><li class="pSmartList1">Due to differences in Arbitrated Loop Physical Address (ALPA) support on devices, FC ID 
persistency for loop-attached devices is not guaranteed.
</li>
</ul></div>
<a name="wp1527419"> </a><h2 class="pHeading2">
Detailed Steps
</h2>
<a name="wp1595020"> </a><p class="pBody">
To enable the persistent FC ID feature, follow these steps:

</p>
<div class="pSmartList1"><ol type="1" class="pSmartList1">
<a name="wp1595021"> </a><li class="pSmartList1">Expand <span style="font-weight: bold">Fabric &gt; All VSANs </span>and then select <span style="font-weight: bold">Domain Manager</span> in the Logical Domains pane<span style="font-weight: bold"> </span>for the 
fabric and VSAN that you want to enable the Persistent FC ID feature for. 
</li>
<a name="wp1595022"> </a><p class="pListBodyLevel1">
You see the running configuration of the domain in the Information pane.

</p>
<a name="wp1595023"> </a><li class="pSmartList1">Select the <span style="font-weight: bold">Persistent Setup </span>tab and check the <span style="font-weight: bold">enable </span>check box for each switch in the fabric that will 
have persistent FC ID enabled.
</li>
<a name="wp1595024"> </a><li class="pSmartList1">Click the <span style="font-weight: bold">Apply Changes </span>icon to save these changes.
</li>
</ol></div>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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