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The Cisco Dynamic Packet Transport (DPT) products define a new generation of transport technology—packet optimized optical transport solutions. These solutions combine the bandwidth-efficient and services-rich capabilities of IP routing with the bandwidth-rich, self-healing capabilities of fiber rings to deliver fundamental cost and functionality advantages over existing solutions.
SRP is the media independent MAC layer protocol that enables DPT functionality in ring configurations. The SRP MAC provides the base functionality for addressing, packet stripping, bandwidth control, and control message propagation on the packet ring. DPT rings run on a variety of transport technologies including SONET/SDH, wavelength division multiplexing (WDM) and dark fiber. DPT provides carriers with the flexibility to operate packet rings over their embedded fiber transport infrastructure and provides an evolution path to packet-optimized transport for high-bandwidth IP networks. The DPT interface processor also provides the choice of multimode, single-mode intermediate reach and single-mode long reach optics to meet application requirements.
Spatial Reuse Protocol
Transport Flexibility and Evolution