Network Requirements
description
Transcript of Network Requirements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 1
BCMSN Module 1 Lesson 1
Network Requirements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 5
Cisco SONA Framework Layers
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 6
Cisco Enterprise Architecture
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 7
Nonhierarchical Network Devices
Large collision domain
Large broadcast domain
High latency
Difficult to troubleshoot
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 8
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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 10
Multilayer Switching
Combined functionalityLayer 2 switching
Layer 3 switching
Layer 4 switching
Low latency
High-speed scalability
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 12
Hierarchical Campus Model
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 13
Enterprise Composite ModelFunctional Areas
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 14
Enterprise Composite Network Model
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 15
Modules in the Enterprise Campus
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 16
Campus Infrastructure Module
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 17
Activity
Research case studies to see how enterprises are making use of the SONA architecture.
Navigate to www.cisco.com and search on “SONA Case Studies”.
From the SONA homepage, find the link for case studies.
Select one of the case studies to read about an application of the SONA approach.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 18
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?
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 19
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.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 20
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.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 21
Q and A
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 22
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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialBCMSN 1 - 1 23