Alcatel-Lucent 6850-48 ネットワークガイド

ERP Overview

Configuring ERP

page 14-6

OmniSwitch AOS Release 6 Network Configuration Guide

• When the RPL owner receives the R-APS (NR) message, it starts the Wait-To-Restore timer (WTR), 

which is the set period of time that must elapse before the RPL owner blocks the RPL. 

• Once the WTR timer expires, the RPL owner blocks the RPL and transmits an R-APS (NR, RB) 

message indicating that RPL is blocked (RB). 

• On receiving the R-APS (NR, RB) message, ring nodes flush all the dynamic MAC addresses learned 

on their ring ports and unblock any previously blocked ports. 

• The ring is now operating in the idle mode. The RPL is blocked and all other ring links are operational.

In a network where all connected nodes cannot belong to a single ERP ring, the OmniSwitch supports 
multiple ERP rings with a single shared node. The network example below shows two ERP rings 
connected with a shared node. 

In this example each of the ERP rings has a different Service VLAN configured which allows the ERP 
PDUs to be processed by the corresponding ERP ring node. The protected VLANS can be shared across 
ERP rings. The Service VLAN configured for ERP ring 1 is configured as a protected VLAN for ERP ring 
2 and the Service VLAN for ERP ring 2 is configured as a protected VLAN for ERP ring 1. 

• The two ERP rings must be configured with the same VLAN type; standard or VLAN stacking. 

• Only a single node can be shared between the ERP rings; multiple shared nodes could result in a loop if 

the rings that are configured on shared nodes have common protected VLANS.

• Traffic for a protected VLAN will not be passed if the protected VLAN is deleted from either ERP ring 

or if the shared node goes down.