Patent ID: 8284655
Filing Date: 2012-10-09
Classification: H04J,H04L

Abstract:
1. A method for processing a control frame for controlling path protection switching between redundant paths which include a working path and a protection path, said method comprising: at the time of working/protection switching of said redundant paths, stopping monitoring whether or not said control frame has been received via a previous working path which is the path used as said working path until said switching is completed, at a first node apparatus as one of two node apparatuses coupled mutually via said redundant paths; determining at said first node apparatus, whether a second node apparatus as the other of said two node apparatuses has stopped transmitting said control frame via a new working path which is the path used as said working path after said switching is completed; and starting at said first node apparatus, monitoring whether or not said control frame has been received via said new working path, when it is determined that said second node apparatus has stopped transmitting said control frame via said new working path.