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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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Network Requirements

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Bsci module 1 lesson 1

BSCI Module 1 Lesson 1

Network Requirements



  • 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

Cisco sona framework layers

Cisco SONA Framework Layers

Cisco enterprise architecture

Cisco Enterprise Architecture

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


  • 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


  • 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

Hierarchical campus model

Hierarchical Campus Model

Enterprise composite model functional areas

Enterprise Composite ModelFunctional Areas

Enterprise composite network model

Enterprise Composite Network Model

Modules in the enterprise campus

Modules in the Enterprise Campus

Campus infrastructure module

Campus Infrastructure Module

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?



  • 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.



  • 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.

Q and a

Q and A



  • Cisco Service-Oriented Network Architecture


  • Cisco Intelligent Information Network


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