Planet WGS-4215 Series User Manual page 340

4.14 Ring
Use the Maintenance menu items to display and configure basic configurations of The Wall-mount Managed Switch. Under
maintenance, the following topics are provided to back up, upgrade, save and restore the configuration. This section has the
following items:
■ Ring Wizard
■ ERPS
ITU-T G.8032 Ethernet Ring protection switching (ERPS) is a link layer protocol applied on Ethernet loop protection to
provide sub-450ms protection and recovery switching for Ethernet traffic in a ring topology.
ERPS provides a faster redundant recovery than Spanning Tree topology. The action is similar to STP or RSTP, but the
algorithms between them are not the same. In the Ring topology, every switch should be enabled with Ring function and two
ports should be assigned as the member ports in the ERPS. Only one switch in the Ring group would be set as the RPL owner
switch that one port would be blocked, called owner port, and PRL neighbor switch has one port that one port would be blocked,
called neighbor port that connect to owner port directly and this link is called the Ring Protection Link or RPL. Each switch
will sends ETH-CCM message to check the link status in the ring group. When the failure of network connection occurs, the
nodes block the failed link and report the signal failure message, the RPL owner switch will automatically unblocks the PRL to
recover from the failure.
You can quickly buld an ERPS ring by wizard.
You can configure ERPS ring in detail.
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User's Manual of WGS Managed Series