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What is Bandwidth on Demand ?
Bandwidth on Demand (BoD) is based on a
technology that employs a new way of managing
and controlling SONET-based equipment
It allows Network elements to manage themselves,
and to perform certain functions autonomously
It also allows SONET networks to be designed in a
Mesh topology as opposed to a ring architecture
The net effect is a platform that can provision
certain point-to-point private line services within
hours
How does it work ?
Bandwidth on Demand uses Optical Control Plane
technology. Optical Control Plane establishes a
new level of intelligence and Network awareness
in each device that is connected to it
This intelligence brings with it certain capabilities
and features that are traditionally associated
with switched data networks (Frame Relay, ATM,
Ethernet, IP), while still providing the high
reliability associated with private line services
provisioned over SONET architectures
Optical Control Plane
Transport Plane (Transmission and Multiplexing)
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Management Plane
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Responsible for the physical aspects of the device
Handles the transmission of customer traffic between devices
Responsible for multiplexing and de-multiplexing
Operates within the confines of the protocols that it transmits
Responsible for the logical aspects of the device
Manages the devices as part of a network
Performs alarm reporting and performance monitoring
Communicates with other devices in the network
Manages protection switching functionality
Control Plane
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Responsible for understanding the topology of the Network
Provides signaling capabilities across networks
Provides a routing function across multiple networks
Reports out to the Network on any performance conditions
Interoperates with transport and management planes
Today’s Network
Existing architecture is ringbased SONET and Wave
Division Multiplexing
(WDM) facilities
Most IOF Network Elements
have low interface
utilization and high passthrough utilization
We manage a series of
Optical Networks rather
than one Optical Network
• We rely very heavily on OSS intelligence and Network Element
reliability
– Product enhancements require costly and time consuming OSS coding
– SONET Data Communication Channel (DCC) capabilities have
remained unchanged since early 1990’s
BoD – Just in Time Provisioning Feature
Benefits of BoD -Just in Time Provisioning
 Combines the benefits of switched data and SONET network
architectures into a single intelligent platform
 Network self-optimizes
 Lays the groundwork for other advancements in converged
platforms
What is this kind of Network capable of ?
Provisioning in a Bandwidth on Demand Mesh
Environment
Each Network element automatically recognizes when
another Network element is added to or removed from
the Network
All of the Network elements then recalculate their routes
based on the new topology and update their routing
tables
A request to provision a circuit is sent to a single Network
element between two destination addresses
The routing tables determine the most efficient route to
take and send a single packet (In-Band) to instruct all
affected network elements to provision themselves.
The circuit is then up and working
Ping for Path and
Circuit Establishment of an OC3
circuit