1. Resilient Packet Ring
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Presented BY:
AKSHAY BHARDWAJ

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RPR Introduction
 An important trend in networking is the migration of packet-
based technologies from Local Area Networks to Metropolitan
Area Networks (MANs).
 The rapidly increasing volume of data traffic in metro networks
is challenging the capacity limits of existing transport
infrastructures based on circuit-oriented technologies like SONET
and ATM.
 Packet based transport technology is considered by many to be
the only alternative for scaling metro networks to meet the
demand.

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RPR Introduction
Packet based ring network for Metropolitan Area
Networks (MANs).
Towards to IEEE Standard, IEEE P802.17Based on Cisco
Spatial Reuse Protocol Support up to 255 station
attachments
Optimized for rings with maximum circumference of
2000 kilometers

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SONET and Ethernet in Metro Rings
SONET have two types of network:
• Access Network :
•Fully Meshed Network:

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9. Resilient Packet Ring –
Emerging Metro Network
Architecture
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 Resilient Packet Ring is an emerging network architecture
and technology designed to meet the requirements of a packet-
based metropolitan area network.
Unlike incumbent architectures based on Ethernet switches or
SONET ADMs(Add-drop muxes), RPR approaches the metro
bottleneck problem with a clean slate.

10. RPR Layer Model
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•Layer model is consistent with 802 conventions.
• Layer diagram is used to describe the architectural
positioning and relationship of clauses within the
overall RPR MAC.
• The layer diagram is not a functional or block
diagram.

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Main components of RPR
Spatial Reuse

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Main components of RPR
Topology
discovery

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Main components of RPR
Traffic classes:
There are three traffic classes in RPR:
class A – designed for high priority traffic, in particular
for flows with low delays and guaranteed link bandwidth
demands (e.g. VoD services)
class B – designed for medium priority traffic, in
particular for packets for which the traffic contract isn’t
possible to be filled (e.g. VoIP)
class C – designed for low priority traffic, in particular
for all best effort traffic (e.g. data transfer)

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RPR Characteristics
 Packet ADM Architecture
 Physical Layer Versatility
 Resiliency
 Bandwidth Fairness
 Broadcast or Multicast Traffic
 Simplified Service Provisioning

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RPR devices act as packet ADMs connected to a shared
medium.
RPR devices act as packet ADMs connected to a shared
medium.