Advantages of the Architecture


At this point we can step back and take a look at some of the advantages of multiservice switches. From a network operator perspective, several advantages are

  • Multiple services can operate on the same platform. This lets providers develop multiple revenue streams from a single investment in packet networking.

  • "Ships in the night" functionality. Controllers operate independently from each other; resulting in no intercontroller dependencies. For example, if one controller needs to be upgraded (in software or hardware) or removed, it does not interrupt service for other controllers.

  • The capability to choose the control plane that is most suited for the particular application. As a starting point, you can choose PNNI for connection-oriented services and MPLS for IP connectionless services. Also, you can choose the controlled switch based on the switching needs.

The benefits from a networking equipment developer and vendor perspective are

  • Platform-independent software. The fact that the controller is unaware of the platform-specific details allows the reuse of controller software. This allows a faster time to market for newer switches.

  • The ability to reuse controller software also provides consistency and interoperability/interworking in operation.

  • Simpler controller software because of the elimination of platform-specific code results in higher-quality code and fewer defects.

  • Different groups or business units can develop the controlled switch and the different controllers.

As another advantage, the network control module and the switching and forwarding functions can evolve independently from each other.




Cisco Multiservice Switching Networks
Cisco Multiservice Switching Networks
ISBN: 1587050684
EAN: 2147483647
Year: 2002
Pages: 149

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