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Network Requirements

BSCI 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. BSCI 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. 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?

  18. 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.

  19. 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.

  20. Q and A

  21. 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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