On Wed, Jun 29, 2011 at 05:08:29PM +0800, Wei-Chih Chen wrote:
> From OpenFlow Switch Specification, there are flow tables and a group table
> in a OpenFlow Switch.

You must be reading the OpenFlow 1.1 specification.  OVS only supports
OpenFlow 1.0, which does not have a group table.

> These tables do the matching and actions.
> Are OpenFlow messages handled in/by the switch or the controller @@?

Both.
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