Erps Settings - D-Link xStack DGS-3420 Series Reference Manual

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
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ERPS Settings

Ethernet Ring Protection Switching (ERPS) is the first industry standard (ITU-T G.8032) for ERPS. ERPS provides sub-
50ms protection for Ethernet traffic in a ring topology. It ensures that there are no loops formed at the Ethernet layer.
One link within a ring will be blocked to avoid Loop (RPL, Ring Protection Link). When the failure happens, protection
switching blocks the failed link and unblocks the RPL. When the failure clears, protection switching blocks the RPL
again and unblocks the link on which the failure is cleared.
G.8032 Terms and Concepts
RPL (Ring Protection Link) – Link designated by mechanism that is blocked during Idle state to prevent loop on
Bridged ring
RPL Owner – Node connected to RPL that blocks traffic on RPL during Idle state and unblocks during Protected state
R-APS (Ring – Automatic Protection Switching) – A feature defined in Y.1731 and G.8032 used to coordinate the
protection actions over the ring through RAPS VLAN (R-APS Channel).
RAPS VLAN (R-APS Channel) – A separate ring-wide VLAN for transmission of R-APS messages
Protected VLAN – The service traffic VLANs for transmission of normal network traffic
This page is used to enable the ERPS function on the switch.
NOTE: STP and LBD should be disabled on the ring ports before enabling ERPS. The ERPS cannot be
enabled before the R-APS VLAN is created, and ring ports, RPL port, RPL owner, are configured.
To view the following window, click L2 Features > ERPS Settings, as show below:
The fields that can be configured are described below:
Parameter
ERPS State
ERPS Log
Figure 4-104 ERPS Settings Window
Description
Here the user can enable or disable the ERPS State.
Here the user can enable or disable the ERPS Log.
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