Data Center Technology Commands 1169User GuidelinesThis command configures the switch to accept a connection request from acontroller. When passive mode is enabled, the switch accepts TCPconnections to ports 6632 and 6633 respectively using any switch IP address.In this mode, the switch continues to attempt to initiate connections toconfigured controllers.The OpenFlow component always initiates the SSL connections and does notaccept SSL connections.OpenFlow operates on the stack master only. Flows may not be configured onstack members. Failover to the stack standby unit is not supported.OpenFlow should only be enabled on stand-alone switches and should not beenabled on stacks of switches. This restriction is not enforced.Command HistoryIntroduced in version 6.3.0.1 firmware.ExampleThis example configures a connection to the controller at IPv4 address 1.2.3.4TCP port 3435 using SSL security and also configures the controller to acceptTCP connections to the switch on port 6633.console(config)#openflowWARNING! OpenFlow does not operate on stack members. Enable OpenFlow onstand-alone switches only.console(config-of-switch)#controller ipv4 1.2.3.4 port 3435 security sslconsole(config-of-switch)#passiveconsole(config-of-switch)#mode autoconsole(config-of-switch)#exitprotocol-versionUse the protocol-version command to select the version of the protocol inwhich to operate. Use the no form of the command to return theconfiguration to the default.