On Thu, 05 Sep 2013 15:32:13 +0800, 黄登辉 <huangdeng...@gmail.com> wrote:

As we know, openflow message OFPT_FEATURE_REQUEST is controller sent to OF
Switch to get what kind of features target OF Switch supports? such as
bitmap of supported capabilities, bitmap of supported actions, and how many ports and tables it support, and so on, For this mail, i am focus on ports
feature, considering this kind of scenario, i created a OF switch by
command:
*ovs-vsctl add-br br0,
*
*ovs-vsctl set-controller br0 tcp:ip:port

*
*At this time, after connection between controller and switch br0 is
established, when controller send OFPT_FEATURE_REQUEST to this switch br0,
it will tell controller it only have one port for interface br0, right?
Since, i don't execute any ovs-vsctl add-port command to add port in switch br0. Is my understanding right? If it is right, it means OpenvSwitch which
will dynamically add port into switch, then i have a question, how OVS
report subsequent new add port to controller?
*
**

Switches send OFPT_PORT_STATUS messages to inform the controllers about events such as physical ports being added, modified and removed as documented in the
OpenFlow spec.


--
regards,
hunt
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