generated and transmits a result result to the transport sdn controller 100 in operation 455 if the test result satisfies actually needed performance the transport sdn controller 100 transmits a provisioning result requestevplanprovisioning to requesting client device 190 the provisioning result requestevplanprovisioning may include a path test result the path computation the provisioning and the path test described in operations 415 to 455 may be requested at the same time that is if the client 190 transmits a multi node provisioning request to nbi 110 of the transport sdn controller 100 in operation 415 the path computation operation 420 the provisioning operations 435 and 440 and the path test operations 445 and 450 are performed and then a multi node provisioning result requestpathandprovisioningevplan may be transmitted to requesting client device 190 the multi node provisioning result requestpathandprovisioningevplan may include the authentication result token and multi node information multinodes and the multi node provisioning result requestpathandprovisioningevplan includes the reference number refnumber fig5 is an example flow diagram illustrating a method for computing an optimum path between multi nodes by the path computation module 130 in accordance with at least some embodiments described herein referring to fig5 and fig2 b in process 500 client 190 may request for e lan services with a reference to n target nodes and include information including e g user bandwidths bw for the respective target nodes and an e.