Ring - Interlogix NS3552-8P-2S-V2 User Manual

Chapter 4: Web configuration
Object
256~511
512~1023
1024~1588
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Ring

ITU-T G.8032 Ethernet Ring Protection Switching (ERPS) is a link layer protocol
applied on Ethernet loop protection to provide sub-50 ms 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 the 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 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.
294
Description
between 128 to 255 octets in length.
The total number of packets (including bad packets) received that were
between 256 to 511 octets in length.
The total number of packets (including bad packets) received that were
between 512 to 1023 octets in length.
The total number of packets (including bad packets) received that were
between 1024 to 1588 octets in length.
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NS3552-8P-2S-V2 User Manual