12
Step Command Remarks
view.
3. Set the datapath ID.
datapath-id
id
By default, the datapath ID of an
OpenFlow instance contains the
instance ID and the bridge MAC
address of the device. The upper
16 bits are the instance ID and the
lower 48 bits are the bridge MAC
address of the device.
Activating or reactivating an OpenFlow instance
CAUTION:
Reactivating an OpenFlow instance refreshes the configuration data and interrupts communication
with the controllers.
To activate or reactivate an OpenFlow instance:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter OpenFlow instance
view.
openflow instance
instance-id N/A
3. Activate or reactivate the
OpenFlow instance.
active instance
By default, an OpenFlow instance
is not activated.
Configuring controllers for an OpenFlow switch
A switch can establish connections with multiple controllers. The controller role contains the following
types:
• Equal—In this role, the controller has full access to the switch and is equal to other controllers
in the same role. By default, the controller receives all switch asynchronous messages such as
packet-in and flow removed messages. The controller can send controller-to-switch messages
to modify the state of the switch.
• Master—This role is similar to the Equal role and has full access to the switch. The difference is
that up to one controller in this role is allowed for a switch.
• Slave—In this role, the controller has read-only access to the switch.
The controller cannot send controller-to-switch messages to perform the following tasks:
{ Deploy flow entries, group entries, and meter entries.
{ Modify the port and switch configurations.
{ Send Packet-out messages.
By default, the controller does not receive switch asynchronous messages except Port-status
messages. The controller can send Asynchronous-Configuration messages to set the
asynchronous message types it wants to receive.
When OpenFlow operation is initiated, a switch is simultaneously connected to multiple controllers in
Equal state. A controller can request its role to be changed at any time.
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