CHAPTE R
15-1
Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2
78-19415-01
15
Configuring Resilient Packet Ring on the ML-Series Card
Note
The terms "Unidirectional Path Switched Ring" and "UPSR" may appear in Cisco literature. These terms
do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration.
Rather, these terms, as well as "Path Protected Mesh Network" and "PPMN," refer generally to Cisco's
path protection feature, which may be used in any topological network configuration. Cisco does not
recommend using its path protection feature in any particular topological network configuration.
This chapter describes how to configure resilient packet ring (RPR) for the ML-Series card.
This chapter contains the following major sections:
Understanding RPR, page 15-1
Configuring RPR, page 15-6
Monitoring and Verifying RPR, page 15-16
Add an ML-Series Card into an RPR, page 15-17
Delete an ML-Series Card from an RPR, page 15-21
Cisco Proprietary RPR KeepAlive, page 15-25
Configuring Cisco Proprietary RPR KeepAlive, page 15-25
Monitoring Cisco Propretary RPR KeepAlive, page 15-25
Cisco Proprietary RPR Shortest Path, page 15-25|
Configuring Shortest Path and Topology Discovery, page 15-25
Monitoring and Verifying Shortest Path and Topolgy Discovery, page 15-25
Redundant Interconnect, page 15-25

Understanding RPR

RPR is a new MAC protocol operating at the Layer 2 level. It is well suited for transporting Ethernet
over a SONET ring topology and enables multiple ML-Series cards to become one functional network
segment or shared packet ring (SPR). RPR overcomes the limitations of earlier schemes, such as IEEE
802.1D Spanning Tree Protocol (STP), IEEE 802.1W Rapid Spanning Tree Protocol (RSTP), and