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BSCI Module 1 Lesson 1

Network Requirements

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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

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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

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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

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Cisco SONA Framework Layers

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Cisco Enterprise Architecture

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Nonhierarchical Network Devices

Large collision domain

Large broadcast domain

High latency

Difficult to troubleshoot

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Issues

No traffic between VLANs

Unbounded broadcast domain

Servers not centrally located

Layer 2 Switching

Hardware-based bridging

Wire-speed performance

Collision domain per port

Traffic containment based on MAC address

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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

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Multilayer Switching

Combined functionalityLayer 2 switching

Layer 3 switching

Layer 4 switching

Low latency

High-speed scalability

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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

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Hierarchical Campus Model

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Enterprise Composite ModelFunctional Areas

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Enterprise Composite Network Model

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Modules in the Enterprise Campus

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Campus Infrastructure Module

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Self Check

1. Name the 3 layers of the SONA Framework.

2. What are the 3 phases in building an Intelligent Information Network?

3. What are the main issues with non-hierarchical network devices?

4. How is the hierarchical model divided?

5. What are the 3 functional areas in the Enterprise Composite Model?

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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.

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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.

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Q and A

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Resources

Cisco Service-Oriented Network Architecturehttp://cisco.com/en/US/partner/netsol/ns629/networking_solutions_market_segment_solutions_home.html

Cisco Intelligent Information Networkhttp://cisco.com/en/US/partner/netsol/ns650/networking_solutions_market_segment_solution.html

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