O'Reilly logo

Software-Defined Networking with OpenFlow - Second Edition by Siamak Azodolmolky, Oswald Coker

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Controller-to-switch messages

These messages are used to directly manage or inspect the state of the switch:

  • Handshake: Upon the establishment of the TLS session (for example, the TLS TCP session on port 6633), the controller sends an OFPT_FEATURES_REQUEST message to the switch and the OpenFlow switch reports back (via the OFPT_FEATURES_REPLY message) the features and capabilities that it has and that it supports. The datapath_id field uniquely identifies an OpenFlow switch (datapath). It is a 64-bit entity and the lower 48 bits are intended for the switch MAC address, while the top 16 bits are up to the manufacturer. Datapath identifier (datapath_id) has a maximum number of packets the switch can buffer when sending packets to the controller ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required