> # Configuring Duplicate Message Throttle

> You can configure a throttling mechanism to limit the number of Call Home messages received for the same event. If the same message is sent multiple times from the switch within a short period of time, you may be swamped with a large number of duplicate messages.

> ## Restrictions

> - By default, this feature is enabled in all switches in the Cisco MDS 9000 Family and the Cisco Nexus 5000 Series switches. When enabled, if the number of messages sent exceeds the maximum limit of 30 messages within the 2-hour time frame, then additional messages for that alert type are discarded within that time frame. You cannot modify the time frame or the message counter limit.
> - If 2 hours have elapsed since the first such message was sent and a new message has to be sent, then the new message is sent and the time frame is reset to the time when the new message was sent and the count is reset to 1.

> ## Detailed Steps

> To enable message throttling in a Cisco MDS 9000 Family switch or a Cisco Nexus 5000 Series switch, follow these steps:

> 1. Select a switch in the Fabric pane.
> 2. Expand Events and select Call Home in the Physical Attributes pane.

> You see the Call Home information in the Information pane.

> 3. Click the Control tab.
> 4. Select a switch in the Information pane.
> 5. Check the Duplicate Msg Throttle check box.
> 6. Click the Apply Changes icon.

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