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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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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

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

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.


  • Cisco Service-Oriented Network Architecture


  • Cisco Intelligent Information Network