Correct Answer: C,E
Explanation/Reference:
You must enable openflow.
Enable/disable Openflow:
openflow <vlan_id> {enable/disable}
Note:
Openflow Configuration (required)
Once you've set up a VLAN, you need to enable and configure an OpenFlow instance on that VLAN.
Show the set of configured OpenFlow instances:
show openflow
Enter the VLAN for the instance you'd like to configure:
vlan <vlan_id>
Show the Openflow configuration, including configurable state, controller connectivity, and switch MAC addr:
show openflow <vlan_id>
Set the controller string (6633 is NOX's default port):
openflow <vlan_id> controller tcp:<ip_addr>:<tcp_port>
Enable/disable Openflow:
openflow <vlan_id> {enable/disable}
Reference: Configuring HP Procurve
http://archive.openflow.org/wk/index.php/Configuring_HP_Procurve