Web Management Guide-R04

Table Of Contents
Chapter 13
| Basic Administration Protocols
Ethernet Ring Protection Switching
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default MAC address is disabled for the R-APS Def MAC parameter, then the
Domain ID will be used in R-APS PDUs.
Admin Status – Activates the current ERPS ring. (Default: Disabled)
Before enabling a ring, the global ERPS function should be enabled see (“ERPS
Global Configuration” on page 488), the east and west ring ports configured on
each node, the RPL owner specified, and the control VLAN configured.
Once enabled, the RPL owner node and non-owner node state machines will
start, and the ring will enter idle state if no signal failures are detected.
Version – Specifies compatibility with the following ERPS versions:
1 - ERPS version 1 based on ITU-T G.8032/Y.1344.
2 - ERPS version 2 based on ITU-T G.8032/Y.1344 Version 2. (This is the
default setting.)
In addition to the basic features provided by version 1, version 2 also supports:
Multi-ring/ladder network support
Revertive/Non-revertive recovery
Forced Switch (FS) and Manual Switch (MS) commands for manually
blocking a particular ring port
Flush FDB (forwarding database) logic which reduces amount of flush FDB
operations in the ring
Support of multiple ERP instances on a single ring
Version 2 is backward compatible with Version 1. If version 2 is specified, the
inputs and commands are forwarded transparently. If set to version 1, MS and
FS operator commands are filtered, and the switch set to revertive mode.
The version number is automatically set to “1” when a ring node, supporting
only the functionalities of G.8032v1, exists on the same ring with other nodes
that support G.8032v2.
When ring nodes running G.8032v1 and G.8032v2 co-exist on a ring, the ring ID
of each node is configured as “1”.
In version 1, the MAC address 01-19-A7-00-00-01 is used for the node identifier.
The R-APS Def MAC parameter has no effect.
MEG Level – The maintenance entity group (MEG) level which provides a
communication channel for ring automatic protection switching (R-APS)
information. (Range: 0-7)
This parameter is used to ensure that received R-APS PDUs are directed for this
ring. A unique level should be configured for each local ring if there are many R-
APS PDUs passing through this switch.