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    <title>About the multi-pid Option </title>
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<a name="wp1073858"> </a><h1 class="pTitle">
About the multi-pid Option

</h1>
<a name="wp1073859"> </a><p class="pBody">
If the RSCN <b class="cBold">multi-pid</b> option is enabled, then RSCNs generated to the registered Nx ports may contain 
more than one affected port IDs. In this case, zoning rules are applied before putting the multiple affected 
port IDs together in a single RSCN. By enabling this option, you can reduce the number of RSCNs. For 
example, suppose you have two disks (D1, D2) and a host (H) connected to switch 1. Host H is registered 
to receive RSCNs. D1, D2, and H belong to the same zone. If disks D1 and D2 are online at the same 
time, then one of the following applies:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1073860"> </a><li class="pSmartList1">The <b class="cBold">multi-pid</b> option is disabled on switch 1&#8212; Two RSCNs are generated to host H, one for the disk 
D1 and another for disk D2.
</li>
<a name="wp1073861"> </a><li class="pSmartList1">The <b class="cBold">multi-pid</b> option is enabled on switch 1&#8212; A single RSCN is generated to host H, and the RSCN 
payload lists the affected port IDs (in this case, both D1 and D2).
</li>
</ul></div>
<a name="wp1072867"> </a><p class="pBody">
Some Nx ports might not support multi-pid RSCN payloads. If this situation occurs, disable the RSCN 
<b class="cBold">multi-pid</b> option.

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

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