© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN BCMSN Module 1 Lesson 1 Network Requirements

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Objectives  Define IIN and Cisco SONA frameworks  Describe the Cisco Enterprise Architecture and how it maps to the traditional three-layer hierarchical network model  Describe the devices in a nonhierarchical network  Identify problems that can occur in a nonhierarchical switched network  Identify problems that can occur in a nonhierarchical routed network  Define multilayer switches in a nonhierarchical network  List the issues that occur with multilayer switches and VLANs in a nonhierarchical network  Describe the Enterprise Composite module, which can be used to divide the enterprise network into physical, logical, and functional boundaries  List the benefits of the ECNM  Describe the Campus Infrastructure module of the ECNM

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Intelligent Information Network  Intelligent Information Network (IIN) integrates networked resources and information assets.  IIN extends intelligence across multiple products and infrastructure layers.  IIN actively participates in the delivery of services and applications.  Three phases in building an IIN are: Integrated transport Integrated services Integrated applications

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Cisco SONA Framework  The Cisco Service-Oriented Network Architecture (SONA) is an architectural framework.  SONA brings several advantages to enterprises: Outlines how enterprises can evolve towards the IIN Illustrates how to build integrated systems across a fully converged intelligent network Improves flexibility and increases efficiency

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Cisco SONA Framework Layers

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Cisco Enterprise Architecture

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Nonhierarchical Network Devices  Large collision domain  Large broadcast domain  High latency  Difficult to troubleshoot

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Issues  No traffic between VLANs  Unbounded broadcast domain  Servers not centrally located Layer 2 Switching  Hardware-based bridging  Wire-speed performance  Collision domain per port  Traffic containment based on MAC address

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Layer 3 Routing  Single broadcast domain per interface  ACLs can be applied between segments Issues  High per-port cost  Layer 3 processing required  High latency over Layer 2 switching

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Multilayer Switching  Combined functionality Layer 2 switching Layer 3 switching Layer 4 switching  Low latency  High-speed scalability

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Issues with Multilayer Switches in a Nonhierarchical Network  Single point of failure for Layers 2 and Layers 3  Underutilization of hardware  Spanning tree complexity  Servers not centrally located

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Hierarchical Campus Model

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Enterprise Composite Model Functional Areas

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Enterprise Composite Network Model

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Modules in the Enterprise Campus

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Campus Infrastructure Module

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Activity  Research case studies to see how enterprises are making use of the SONA architecture.  Navigate to and search on “SONA Case Studies”.  From the SONA homepage, find the link for case studies.  Select one of the case studies to read about an application of the SONA approach.

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Self Check 1.Name the 3 layers of the SONA Framework. 2.What are the 3 phases in building an Intelligent Information Network? 3.What are the main issues with non-hierarchical network devices? 4.How is the hierarchical model divided? 5.What are the 3 functional areas in the Enterprise Composite Model?

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Summary  The SONA framework guides the evolution of the enterprise network towards IIN.  Cisco Enterprise Architecture with a hierarchical network model facilitates the deployment of converged networks.  Nonhierarchical network designs do not scale and do not provide the required security necessary in a modern topology.  Layer 2 networks do not provide adequate security or hierarchical networking.  Router-based networks provide greater security and hierarchical networking; however, they can introduce latency issues.

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Summary  Multilayer switches combine both Layer 2 and Layer 3 functionality to support the modern campus network topology.  Multilayer switches can be used in nonhierarchical networks; however, they will not perform at the optimal level.  The enterprise composite model identifies the key components and logical design for a modern topology.  Implementation of an ECNM provides a secure, robust network with high availability.  The Campus infrastructure, as part of an ECNM, provides additional security and high availability at all levels of the campus.

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Q and A

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN Resources  Cisco Service-Oriented Network Architecture ns_market_segment_solutions_home.html  Cisco Intelligent Information Network ns_market_segment_solution.html

© 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN