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

2. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 2 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

3. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 3 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

4. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 4 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

5. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 5 Cisco SONA Framework Layers

6. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 6 Cisco Enterprise Architecture

7. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 7 Nonhierarchical Network Devices  Large collision domain  Large broadcast domain  High latency  Difficult to troubleshoot

8. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 8 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

9. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 9 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

10. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 10 Multilayer Switching  Combined functionality Layer 2 switching Layer 3 switching Layer 4 switching  Low latency  High-speed scalability

11. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 11 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

12. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 12 Hierarchical Campus Model

13. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 13 Enterprise Composite Model Functional Areas

14. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 14 Enterprise Composite Network Model

15. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 15 Modules in the Enterprise Campus

16. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 16 Campus Infrastructure Module

17. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 17 Activity  Research case studies to see how enterprises are making use of the SONA architecture.  Navigate to www.cisco.com and search on “SONA Case Studies”.www.cisco.com  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.

18. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 18 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?

19. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 19 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.

20. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 20 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.

21. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 21 Q and A

22. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 22 Resources  Cisco Service-Oriented Network Architecture http://cisco.com/en/US/partner/netsol/ns629/networking_solutio ns_market_segment_solutions_home.html  Cisco Intelligent Information Network http://cisco.com/en/US/partner/netsol/ns650/networking_solutio ns_market_segment_solution.html

23. © 2006 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialBCMSN 1 - 1 23