H3C Technologies H3C SR8800 - Manual (Page 28)

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Configuring RPR
RPR overview
This section covers these topics:
• Ring structure of RPR
• Data operations on RPR
• Topology discovery
• Fault response methods
• Centralized RPR and distributed RPR
• RPR interface
• Protocols and standards
Resilient Packet Ring (RPR) is a new MAC layer protocol designed for transferring mass data services over
MANs. It can operate on synchronous optical network/synchronous digital hierarchy (SONET/SDH),
Dense Wavelength Division Multiplexing (DWDM) and Ethernet to provide flexible and efficient
networking schemes for broadband IP MANs carriers. The RPR technology delivers these benefits:
• Physical layer diversity
• High bandwidth utilization
• Multicast and broadcast support
• Automatic topology discovery and plug-and-play for stations
• Quick protection mechanism, and 50-ms self healing with topology protection
• Traffic level guarantee based on bandwidth reservation and rate limiting
• Bandwidth sharing fairness among stations on the ring
Ring structure of RPR
RPR is made up of dual unidirectional counter-rotating ringlets identified as Ringlet 0 and Ringlet 1, as
shown in Figure 3 .