<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<!-- saved from url=(0014)about:internet -->
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta http-equiv="Content-Style-Type" content="text/css" />
    <meta name="GENERATOR" content="Quadralay WebWorks AutoMap 2003 Platinum Edition Client for FrameMaker 8.6.6597.0" />
    <meta name="TEMPLATEBASE" content="emwebh8-1-17" />
    <meta name="LASTUPDATED" content="08/01/13 14:48:06" />
    <title>Checking for WWN Conflicts </title>
    <!-- Copyright 2010-2013, Cisco Systems, Inc. All rights reserved. -->

    <link rel="StyleSheet" href="document.css" type="text/css" />
    <link rel="StyleSheet" href="catalog.css" type="text/css" />


<script> 
    var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1; 
   
    if(is_chrome){document.domain=document.domain}
   </script>
    <script type="text/javascript" language="JavaScript1.2" src="expand.js"></script>
    <script type="text/javascript" language="JavaScript1.2" src="page.js"></script>

    <script type="text/javascript" language="JavaScript1.2">
     <!--
      function  WWNoOp() {}
      function  WWNoValue() { return ""; }

      var  VarDropDown;

      if (typeof(HTMLHelp_Object) != "undefined")
      {
        VarDropDown = new WWDropDown_Object();
      }
      else
      {
        VarDropDown = new Object();
        VarDropDown.fAnchorOpen  = WWNoOp;
        VarDropDown.fAnchorClose = WWNoOp;
        VarDropDown.fDIVOpen  = WWNoOp;
        VarDropDown.fDIVClose = WWNoOp;
      }
     // -->
    </script>

  
<SCRIPT language="javascript">
<!--
  self.document.write("<link href='"+top.relPath+"shared/style.css' rel='stylesheet' type='text/css'>");
  myid=1971;
  self.document.write("<script type='text/javascript' language='JavaScript' src='"+top.relPath+"shared/con_utils.js'></scr"+"ipt>");
//-->
</SCRIPT>
</head>

  <body onload="highlightSearchTerms();" bgcolor="#ffffff">

    
    <blockquote>
    <a name="top"></a>

    
    


<a name="wp1075190"> </a><h1 class="pTitle">
Checking for WWN Conflicts

</h1>
<a name="wp1075191"> </a><p class="pBody">
WWNs assigned to static iSCSI initiators by the system can be inadvertently returned to the system when 
an upgrade fails or you downgrade the system software (manually booting up an older Cisco MDS 
SAN-OS release without using the <b class="cBold">install all </b>command). In these instances, the system can later assign 
those WWNs to other iSCSI initiators (dynamic or static) and cause conflicts.

</p>
<a name="wp1075192"> </a><p class="pBody">
You can address this problem by checking for and removing any configured WWNs that belong to the 
system whenever such scenarios occur.

</p>
<a name="wp1113527"> </a><h2 class="pHeading2">
Detailed Steps
</h2>
<a name="wp1333021"> </a><p class="pBody">
To permanently keep the automatically assigned nWWN mapping, follow these steps:

</p>
<div class="pSmartList1"><ol type="1" class="pSmartList1">
<a name="wp1333022"> </a><li class="pSmartList1">Choose<b class="cBold"> End Devices</b> &gt; <b class="cBold">iSCSI </b>in the Physical Attributes pane. 
</li>
<a name="wp1333024"> </a><p class="pListBodyLevel1">
You see the iSCSI tables in the Information pane. 

</p>
<a name="wp1333025"> </a><li class="pSmartList1">Click the <b class="cBold">Initiators </b>tab.
</li>
<a name="wp1333026"> </a><p class="pListBodyLevel1">
You see the iSCSI initiators configured.

</p>
<a name="wp1333027"> </a><li class="pSmartList1">Check the <b class="cBold">Persistent Node WWN</b> check box for the iSCSI initiators that you want to make static.
</li>
<a name="wp1333028"> </a><li class="pSmartList1">Click the <b style="font-weight: bold" class="cBold">Apply Changes</b><span style="font-weight: bold"> </span>icon to save these changes.
</li>
</ol></div>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

    </blockquote>

  </body>
</html>
