Resilient Packet Ring(RPR) technology defines a new type of Media Access Control(MAC) level protocol
which adopts shared medium transmission
a spatial reuse protocol and a <50 ms failure recovery protection mechanism
supporting Service Level Agreements(SLA) and plug-and-play.As an important technology for the future Metropolitan Area Network(MAN) with MAC-based high speed switching
RPR can carry burst IP service while supporting conventional voice transmission.With the rapid development of fiber technology
RPR can be used for both MAN and WAN.On the basis of RPR-based <50 ms failure recovery protection mechanism
a new high survivability network solution is presented in this paper.