Without circuit bonding, the enterprise and ISP routers must use
expensive TDM ports or the service provider must build-out a data transport network.
With circuit bonding, the router can use more economical native Ethernet ports, and
the circuit-bonding connection can be provisioned??”and easily reprovisioned??”to the
desired bandwidth as needs change.
For the service provider, the economics governing the deployment of Ethernet service
are often driven by the ability to use the existing infrastructure to reach a broad base of
customers who could otherwise not be serviced. A single bonded circuit incorporates all
of the features required to utilize the existing infrastructure to offer Ethernet services
to any business. The functions performed by circuit bonding are described next.
286 Chapter 10
Circuit Bonding Functions
In order to economically and efficiently transport Ethernet over new or existing infrastructure,
circuit bonding has incorporated several transport functions in its platform.
These functions, absent in current transport systems in most cases, establish circuit
bonding as an extension to the transport system. circuit bonding should be used when
appropriate performance, protection, operation, and reliability features are required for
the transport of Ethernet over the existing TDM infrastructure.
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