> # Limiting Ingress Port Rate Limiting

> # About Limiting Ingress Port Rate

> 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%.

> 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%.

> Note Port rate limiting can only be configured on Cisco MDS 9100 Series switches, Cisco MDS 9216i switches, and MPS-14/2 modules.

> 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.

> ## Detailed Steps

> To configure the port rate limiting value using Fabric Manager, follow these steps:

> 1. Expand Switches, expand FC Services and then select QoS in the Physical Attributes pane.

> The QoS control traffic information is displayed in the Information pane. The default is the Control tab.

> 2. Click the Rate Limit tab.
> 3. Select the switch whose port rate limit you want to change.
> 4. Enter the desired port rate limit in the Percent column.
> 5. Click the Apply Changes icon to save your changes.

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