Antaira Industrial Ethernet Switches
LMP-0501 Series User Manual V1.0
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Ethernet Ring Protection Switch (ERPS) is an Ethernet ring protection protocol that is used to
prevent forming a loop with LAN, thus, the broadcast storm problem could be avoided. The
loop avoidance mechanism ensures that traffic flows on all links except the RPL ring link. In
order to achieve the loop-avoidance mechanism, ITU-T G.8032 defines three roles in ERPS,
which are “RPL Owner Node”, “RPL Neighbor Node”, and “Normal Node”.
Below are two scenarios that describe how to configure the ERPS using Antaira
’s industrial
managed Ethernet switches. Users can reference it to configure the managed switch as an
RPL-configured architecture shown in
Figure 5.24
or as a non-configured architecture shown
in
Figure 5.25
.
5.5.3.1 Scenario A
– RPL Configured Architecture
Under scenario A, there are three major roles that are required to be configured within the
ERPS configuration.
Figure 5.24
– RPL-Configured Architecture
Caution
:
Before enabling any ERPS protocols on any of the Ring Nodes,
please DO NOT connect the switches to form a loop (ring) network
just yet. There should be at least one ring port left unplugged until all
nodes in the topology are ready.
