The RPR standard contains the following features
that simultaneously make the efficient support for TDM and data services possible.
328 Chapter 12
Support for Four Classes of Service RPR supports four classes of service over the
shared packet ring. This allows service providers to match end-users??™ applications to
the right CoS on its network. All classes-of-service are reclaimable and no bandwidth
is ever stranded.
Flexible Classification of End-user Traffic RPR provides four classes of service of
packets labeled with 802.1p bits for VLAN segregated traffic or labeled by TOS or
DSCP bits in the IP header. These capabilities allow classification of traffic according
to the marking done by the customer CPE or according to the marking performed by
the broadband access network element.
Strict Separation of Traffic RPR Provides for a clear separation between control
plane and forwarding plane functions guarantees maximum separation and resiliency.
Efficient Transport of Multicast??”only one copy is carried over the ring The use
of the standard RPR MAC represents a scalable and efficient way to deliver large
amounts of broadcast and multicast traffic on physical ring topologies.
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