ifs NS4702-24P-4X-V2 User Manual page 346

Chapter 4: Web configuration
assigned as the member ports in the ERPS. Only one switch in the ring group would be
set as the RPL owner switch in which one port (the owner port) would be blocked, and
the PRL neighbour switch has one port (the neighbor port) that would be blocked. The
neighbor port is connected to the owner port directly and this link is called the Ring
Protection Link (RPL). Each switch sends an ETH-CCM message to check the link
status in the ring group. When the failure of a network connection occurs, the nodes
block the failed link and report the signal failure message. The RPL owner switch will
automatically unblock the PRL to recover from the failure.
342 NS4702-24P-4X-V2 Managed Switch User Manual