Table-status messages (OFPT_TABLE_STATUS
) are sent from the switch to the controller when there is any change in the table status; for example, the number of entries in the table crosses the threshold value, called the vacancy threshold. The switch should send this message only to the controller channel in which the controller requested the switch to send it. The controller can express its interest to receive this event by sending the asynchronous configuration message to the switch. Refer to the Configuring the switch to send a list of asynchronous events the controller channel is interested in recipe in Chapter 2, Symmetric Messages and Asynchronous Messages (Part 2), for the procedure to configure the switch to send a table status message to the controller.
OpenFlow Cookbook
OpenFlow Cookbook
Overview of this book
Table of Contents (17 chapters)
Preface
Free Chapter
1. OpenFlow Channel Connection Establishment (Part 1)
1. OpenFlow Channel Connection Establishment (Part 2)
2. Symmetric Messages and Asynchronous Messages (Part 1)
2. Symmetric Messages and Asynchronous Messages (Part 2)
3. Flow Table and Flow Entry Modification Messages (Part 1)
3. Flow Table and Flow Entry Modification Messages (Part 2)
4. Group Table and Meter Table Modification Messages (Part 1)
4. Group Table and Meter Table Modification Messages (Part 2)
5. Handling Multipart Statistics Messages (Part 1)
5. Handling Multipart Statistics Messages (Part 2)
6. Handling Multipart State Information Messages (Part 1)
6. Handling Multipart State Information Messages (Part 2)
7. Handling Bundle Messages (Part 1)
7. Handling Bundle Messages (Part 2)
A. Common OpenFlow Headers, Structures, and Error Code
Index
Customer Reviews