Network Requirements BSCI Module 1 Lesson 1 BSCI

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 BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2

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 BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 3

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 BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4

Cisco SONA Framework Layers BSCI 1 - 1 © 2006 Cisco Systems, Inc. All

Cisco Enterprise Architecture BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights

Nonhierarchical Network Devices § Large collision domain § Large broadcast domain § High latency § Difficult to troubleshoot BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 7

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 BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8

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 BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 9

Multilayer Switching § Combined functionality Layer 2 switching Layer 3 switching Layer 4 switching § Low latency § High-speed scalability BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10

Issues with Multilayer Switches in a Nonhierarchical Network § Single point of failure for Layers 2 and Layers 3 § Underutilization of hardware § Spanning tree complexity § Servers not centrally located BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 11

Hierarchical Campus Model BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights

Enterprise Composite Model Functional Areas BSCI 1 - 1 © 2006 Cisco Systems, Inc.

Enterprise Composite Network Model BSCI 1 - 1 © 2006 Cisco Systems, Inc. All

Modules in the Enterprise Campus BSCI 1 - 1 © 2006 Cisco Systems, Inc.

Campus Infrastructure Module BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights

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. BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 17

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? BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 18

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. BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 19

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. BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 20

Q and A BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights

Resources § Cisco Service-Oriented Network Architecture http: //cisco. com/en/US/partner/netsol/ns 629/networking_solutio ns_market_segment_solutions_home. html § Cisco Intelligent Information Network http: //cisco. com/en/US/partner/netsol/ns 650/networking_solutio ns_market_segment_solution. html BSCI 1 - 1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 22