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    <title>Merging the Database  </title>
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    <blockquote>
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<a name="wp1080821"> </a><h1 class="pTitle">
Merging the Database 

</h1>
<a name="wp1080822"> </a><p class="pBody">
The merge behavior depends on the fabric-wide merge control setting:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1080823"> </a><li class="pSmartList1">Restrict&#8212;If the two databases are not identical, the ISLs between the switches are isolated.
</li>
<a name="wp1080827"> </a><li class="pSmartList1">Allow&#8212;The two databases are merged using the merge rules specified in <a href="zone18.html#wp1080834">Table&#160;17-4</a>.
</li>
<a name="wp1080884"> </a><p class="pBodyRelative">
<div>
<table border="2" cellpadding="2" id="wp1080834table1080828">
  <caption><a name="wp1080834"> </a><div class="pTableTitle">
Table&#160;17-4	Database Zone Merge Status&#160;

</div>
</caption>
  <tr bgcolor="#CCCCCC" align="left" valign="middle">    <th><a name="wp1080842"> </a><p class="pCellHeading">
Local Database

</p>
</th>
    <th><a name="wp1080844"> </a><p class="pCellHeading">
Adjacent Database

</p>
</th>
    <th><a name="wp1080846"> </a><p class="pCellHeading">
Merge Status

</p>
</th>
    <th><a name="wp1080848"> </a><p class="pCellHeading">
Results of the Merge

</p>
</th>
</tr>
  <tr align="left" valign="top">    <td colspan="2" rowspan="1"><a name="wp1080853"> </a><p class="pBody">
The databases contain zone sets with the same name<a href="#wp1080852"><sup class="Footnote">1</sup></a> but 
different zones, aliases, and attributes groups.

</p>
</td>
    <td><a name="wp1080857"> </a><p class="pBody">
Successful.

</p>
</td>
    <td><a name="wp1080859"> </a><p class="pBody">
The union of the local and 
adjacent databases.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td colspan="2" rowspan="1"><a name="wp1080861"> </a><p class="pBody">
The databases contains a zone, zone alias, or zone 
attribute group object with same name<sup class="cSuperscript">1 </sup>but different 
members.

</p>
</td>
    <td><a name="wp1080865"> </a><p class="pBody">
Failed.

</p>
</td>
    <td><a name="wp1080867"> </a><p class="pBody">
ISLs are isolated.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1080869"> </a><p class="pBody">
Empty.

</p>
</td>
    <td><a name="wp1080871"> </a><p class="pBody">
Contains data.

</p>
</td>
    <td><a name="wp1080873"> </a><p class="pBody">
Successful.

</p>
</td>
    <td><a name="wp1080875"> </a><p class="pBody">
The adjacent database 
information populates the 
local database.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1080877"> </a><p class="pBody">
Contains data.

</p>
</td>
    <td><a name="wp1080879"> </a><p class="pBody">
Empty.

</p>
</td>
    <td><a name="wp1080881"> </a><p class="pBody">
Successful.

</p>
</td>
    <td><a name="wp1080883"> </a><p class="pBody">
The local database 
information populates the 
adjacent database.

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

<table>
  <tr>
    <td><a name="wp1080852"> </a><p class="pTableFootnote">
<a href="#wp1080853"><sup class="Footnote">1</sup></a>In the enhanced zoning mode, the active zone set does not have a name in interop mode 1. The zone set names are only present 
for full zone sets.

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

</p>
<a name="wp1080885"> </a><p class="pCaution">
<table border="0">
<tr>
<td>
<strong>Caution	&nbsp;&nbsp;&nbsp;</strong>
</td>
<td>
<p>Remove all non-pWWN-type zone entries on all MDS switches running Cisco SAN-OS prior to merging 
fabrics if there is a Cisco MDS 9020 switch running FabricWare in the adjacent fabric. 
</p>
</td>
</tr>
</table>

</p>
</ul></div>
<a name="wp1080887"> </a><p class="pBody">
The merge process operates as follows:

</p>
<div class="pSmartList0"><ol type="1" class="pSmartList0">
<a name="wp1080888"> </a><li class="pSmartList0">The software compares the protocol versions. If the protocol versions differ, then the ISL is isolated.
</li>
<a name="wp1080889"> </a><li class="pSmartList0">If the protocol versions are the same, then the zone policies are compared. If the zone policies differ, 
then the ISL is isolated. 
</li>
<a name="wp1080891"> </a><li class="pSmartList0">If the zone merge options are the same, then the comparison is implemented based on the merge 
control setting.
</li>
<div class="pSmartList2"><ol type="a" class="pSmartList2">
<a name="wp1080892"> </a><li class="pSmartList2">If the setting is restrict, the active zone set and the full zone set should be identical. Otherwise the link is isolated. </li>
<a name="wp1080893"> </a><li class="pSmartList2">If the setting is allow, then the merge rules are used to perform the merge.</li>
</ol></div>
</ol></div>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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