OmniSwitch AOS Release 7 Network Configuration Guide June 2013 page 11-1
11 Configuring ERP
The ITU-T G.8032/Y.1344 Ethernet Ring Protection (ERP) switching mechanism is a self-configuring
algorithm that maintains a loop-free topology while providing data path redundancy and network
scalability. ERP provides fast recovery times for Ethernet ring topologies by utilizing traditional Ethernet
MAC and bridge functions.
Loop prevention is achieved by allowing traffic to flow on all except one of the links within the protected
Ethernet ring. This link is blocked and is referred to as the Ring Protection Link (RPL). When a ring
failure condition occurs, the RPL is unblocked to allow the flow of traffic to continue through the ring.
Alcatel-Lucent OmniSwitch also supports ERPv2 according to the ITU-T recommendation
G.8032 03/2010. ERPv2 implementation helps maintain a loop-free topology in multi-ring and ladder
networks that contain interconnection nodes, interconnected shared links, master rings and sub-rings.
The following chapter details the different functionalities and configuration settings required for ERP and
ERPv2.
In This Chapter
This chapter provides an overview about how Ethernet Ring Protection (ERP) works and how to
configure its parameters through the Command Line Interface (CLI). CLI commands are used in the
configuration examples; for more details about the syntax of commands, see the
OmniSwitch CLI Reference Guide.
The following information and configuration procedures are included in this chapter:
• “ERP Overview” on page 11-4.
• “Interaction With Other Features” on page 11-10
• “Quick Steps for Configuring ERP with Standard VLANs” on page 11-11.
• “Quick Steps for Configuring ERP with VLAN Stacking” on page 11-12
• “ERP Configuration Overview and Guidelines” on page 11-13
• “ERPv2 Configuration Overview and Guidelines” on page 11-18.
• “Sample Ethernet Ring Protection Configuration” on page 11-22.
• “Switch B -> erp-ring 2 enable” on page 11-25.
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