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    <title>Limiting Ingress Port Rate Limiting </title>
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<a name="wp1075352"> </a><h1 class="pTitle">
Limiting Ingress Port Rate Limiting

</h1>
<a name="wp1250555"> </a><h1 class="pTitle">
About Limiting Ingress Port Rate

</h1>
<a name="wp1250556"> </a><p class="pBody">
A port rate limiting feature helps control the bandwidth for individual Fibre Channel ports. Port rate 
limiting is also referred to as ingress rate limiting because it controls ingress traffic into a Fibre Channel 
port. The feature controls traffic flow by limiting the number of frames that are transmitted out of the 
exit point on the MAC. Port rate limiting works on all Fibre Channel ports. The rate limit ranges from 1 
to 100% and the default is 100%.

</p>
<a name="wp1072664"> </a><p class="pBody">
A port rate limiting feature helps control the bandwidth for individual Fibre Channel ports. Port rate 
limiting is also referred to as ingress rate limiting because it controls ingress traffic into a Fibre Channel 
port. The feature controls traffic flow by limiting the number of frames that are transmitted out of the 
exit point on the MAC. Port rate limiting works on all Fibre Channel ports. The rate limit ranges from 1 
to 100% and the default is 100%.

</p>
<a name="wp1072665"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> Port rate limiting can only be configured on Cisco MDS 9100 Series switches, Cisco MDS 9216i 
switches, and MPS-14/2 modules.

</p>
<a name="wp1072666"> </a><p class="pBody">
This feature can only be configured if the QoS feature is enabled and if this configuration is performed 
on a Cisco MDS 9100 series switch, Cisco MDS 9216i switch, or MPS-14/2 module.

</p>
<a name="wp1244689"> </a><h2 class="pHeading2">
Detailed Steps
</h2>
<a name="wp1240293"> </a><p class="pBody">
To configure the port rate limiting value using Fabric Manager, follow these steps:

</p>
<div class="pSmartList1"><ol type="1" class="pSmartList1">
<a name="wp1240294"> </a><li class="pSmartList1">Expand <b class="cBold">Switches</b>, expand <b class="cBold">FC Services</b> and then select <b class="cBold">QoS</b> in the Physical Attributes pane. 
</li>
<a name="wp1240298"> </a><p class="pListBodyLevel1">
The QoS control traffic information is displayed in the Information pane. The default is the <b class="cBold">Control</b> tab.

</p>
<a name="wp1240305"> </a><li class="pSmartList1">Click the <b class="cBold">Rate Limit </b>tab. 
</li>
<a name="wp1240316"> </a><li class="pSmartList1">Select the switch whose port rate limit you want to change. 
</li>
<a name="wp1240317"> </a><li class="pSmartList1">Enter the desired port rate limit in the Percent column.
</li>
<a name="wp1240318"> </a><li class="pSmartList1">Click the <b class="cBold">Apply Changes</b> icon to save your changes.
</li>
</ol></div>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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