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Network Requirements

BCMSN Module 1 Lesson 1. Network Requirements. 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

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Network Requirements

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  1. BCMSN Module 1 Lesson 1 Network Requirements

  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. 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. 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. Cisco SONA Framework Layers

  6. Cisco Enterprise Architecture

  7. Nonhierarchical Network Devices • Large collision domain • Large broadcast domain • High latency • Difficult to troubleshoot

  8. Layer 2 Switching • Hardware-based bridging • Wire-speed performance • Collision domain per port • Traffic containment based on MAC address Issues • No traffic between VLANs • Unbounded broadcast domain • Servers not centrally located

  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. Multilayer Switching • Combined functionality • Layer 2 switching • Layer 3 switching • Layer 4 switching • Low latency • High-speed scalability

  11. Issues with Multilayer Switchesin a Nonhierarchical Network • Single point of failure for Layers 2 and Layers 3 • Underutilization of hardware • Spanning tree complexity • Servers not centrally located

  12. Hierarchical Campus Model

  13. Enterprise Composite ModelFunctional Areas

  14. Enterprise Composite Network Model

  15. Modules in the Enterprise Campus

  16. Campus Infrastructure Module

  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”. • 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. Self Check • Name the 3 layers of the SONA Framework. • What are the 3 phases in building an Intelligent Information Network? • What are the main issues with non-hierarchical network devices? • How is the hierarchical model divided? • What are the 3 functional areas in the Enterprise Composite Model?

  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. 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. Q and A

  22. Resources • Cisco Service-Oriented Network Architecture • http://cisco.com/en/US/partner/netsol/ns629/networking_solutions_market_segment_solutions_home.html • Cisco Intelligent Information Network • http://cisco.com/en/US/partner/netsol/ns650/networking_solutions_market_segment_solution.html

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