Flow modification

Add/Modify/Delete flow

When the switch rejects a request to add, modify, or delete a flow mod, use the following command:

Syntax

show openflow instance <instance-name> message-statistics

Example

switch(of-inst-test)# show openflow instance test message-statistics

 OpenFlow
 Message Type                            Received       Rejected
 --------------------------------------- -------------- --------
 OFPT_FLOW_MOD                           11             0
 OFPT_PORT_MOD                           0              0
 OFPT_GROUP_MOD                          0              0
 OFPT_METER_MOD                          0              0
 OFPMP_TABLE_FEATURES (Change Pipeline)  0              0
 OFPMP_TABLE_FEATURES (View Pipeline)    1              0

Verifying flows

The flow can be verified at the switch by using the following command.

Syntax

show openflow instance <instance-name> flows

Enable debug openflow at the switch. Run the command and observe the debug output for more specific reasons why the switch rejected the flow.

NOTE:

Similar troubleshooting techniques can be employed for port-modification, meter-modification, and group-modification issues.