Configuring Retransmission Interval and Retry Count
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Prerequisites for Configuring the Access Point Retransmission Interval and Retry Count
You can configure the retransmission intervals and retry count both at a global and a specific access point level. A global configuration applies these configuration parameters to all the access points. Alternatively, when you configure the retransmission level and retry count at a specific access point level, the values are applied to that particular access point. The access point specific configuration has a higher precedence than the global configuration.
Information About Retransmission Interval and Retry Count
The controller and the access points exchange packets using the Control and Provisioning of Wireless Access Points (CAPWAP) reliable transport protocol. For each request, a response is defined. This response is used to acknowledge the receipt of the request message. Response messages are not explicitly acknowledged; therefore, if a response message is not received, the original request message is retransmitted after the retransmit interval. If the request is not acknowledged after a maximum number of retransmissions, the session is closed and the access points reassociate with another controller.
How to Configure Access Point Retransmission Interval and Retry Count
Configuring the Access Point Retransmission Interval and Retry Count (CLI)
Maximum Transmission Unit Information (GUI)
Configuration > Wireless > Access
Points > All APs.
APs page is displayed.
Click the AP
> Edit page is displayed.
MTU field shows the CAPWAP maximum retransmission unit information.
Configuration Examples for Configuring Access Point Retransmission Interval and Retry Count
Viewing the CAPWAP Retransmission Details: Example
Enter the following command:
Controller# show ap capwap retransmit
Global control packet retransmit interval : 3
Global control packet retransmit count : 5
AP Name Retransmit Interval Retransmit Count
--------------------------------- ------------------------------- --------------------------------
3602a 5 3
Viewing Maximum Transmission Unit Information: Example
This example shows how to view the maximum transmission unit (MTU) for the CAPWAP path on the controller. The MTU specifies the maximum size of any packet (in bytes) in a transmission:
Controller# show ap name cisco-ap-name config general | include MTU
CAPWAP Path MTU.................................. 1500