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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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objectives
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
intelligent information network
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
cisco sona framework
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
nonhierarchical network devices
Nonhierarchical Network Devices
  • Large collision domain
  • Large broadcast domain
  • High latency
  • Difficult to troubleshoot
layer 2 switching
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
layer 3 routing
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
multilayer switching
Multilayer Switching
  • Combined functionality
    • Layer 2 switching
    • Layer 3 switching
    • Layer 4 switching
  • Low latency
  • High-speed scalability
issues with multilayer switches in a nonhierarchical network
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
self check
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?
summary
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.
summary1
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.
resources
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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