Introducing Cisco Network Service Architectures © 2004 Cisco Systems, Inc. All rights reserved. Introducing the Enterprise Composite Network Model ARCH v1.21-1

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Hierarchical Model

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Composite Network Model Functional Areas

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Composite Network Model

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Example Implementation of the Enterprise Composite Network Model

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Campus Functional Area

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Campus Infrastructure

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Example Implementation of an Enterprise Campus Network

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Campus Infrastructure Modules Contributions to Enterprise Needs PerformanceScalabilityAvailability Building Access Critical to desktop performance Provides port density Important to provide redundancy Building Distribution Critical to campus performance Provides switch modularity Critical to provide redundancy Campus Backbone Critical to overall network performance Provides switch modularity Critical to provide redundancy and fault tolerance Network Management Monitors performance Monitors device and network availability Server Farm Critical to server performance Provides switch modularity Critical to provide redundancy and fault tolerance Edge Distribution Critical to WAN and Internet performance Provides switch modularity Important to provide redundancy

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Edge Functional Area

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Edge Modules

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Example Enterprise Edge Implementation

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Edge Module Contributions to Enterprise Needs PerformanceScalabilityAvailability E-Commerce Important to provide performance to partners and customers Provides router modularity Important to provide redundancy Internet Connectivity Important to provide performance to Internet Provides router modularity Important to provide redundancy Remote Access and VPN Critical to performance for remote users Provides router modularity Important to provide redundancy WAN Critical to WAN performance Provides router modularity Critical to provide redundancy

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Service Provider Edge Functional Area

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Example Implementation of the Service Provider Edge

© 2004 Cisco Systems, Inc. All rights reserved. ARCH v Summary The Enterprise Composite Network Model provides a modular framework for designing networks. The modularity model allows flexibility in network design and facilitates implementation and troubleshooting. The Enterprise Campus functional area includes the Campus Infrastructure, Network Management, Server Farm, and Edge Distribution modules. The Enterprise Edge functional area is comprised of four modules: E-Commerce, Internet Connectivity, Remote Access and VPN, and WAN. Each module connects to the Edge Distribution module, which connects the enterprise edge and the enterprise campus network. The Service Provider Edge functional area includes three modules: ISP, PSTN, and FR/ATM/PPP. Each module has its own access, distribution, and core layers.