Designing Enterprise Edge Connectivity © 2004 Cisco Systems, Inc. All rights reserved. Reviewing the Enterprise Edge Network Design Methodology ARCH v1.23-1. - презентация

1 Designing Enterprise Edge Connectivity © 2004 Cisco Systems, Inc. All rights reserved. Reviewing the Enterprise Edge Network Design Methodology ARCH v1.23-1

2 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Edge Functional Area

3 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Typical Requirements for the Enterprise Edge Functionality Performance Scalability Availability Manageability Cost-effectiveness

4 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Importance of Enterprise Edge Modules Based on Design Criteria FunctionalityPerformanceScalabilityAvailabilityManageability Cost- Effectiveness E-CommerceCriticalImportant CriticalImportant Internet Connectivity CriticalImportant Remote Access and VPN CriticalImportant WANCriticalImportant CriticalImportantCritical

5 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Enterprise Edge Design Methodology 1. Characterize applications. 2. Select and diagram the WAN topology. 3. Select a service provider and negotiate. 4. Select Layer 2 WAN, remote-access, or Internet technologies. 5. Select Layer 1 WAN, remote-access, or Internet technologies. 6. Select specific WAN, remote-access, and Internet features. 7. Select specific Cisco network devices at each location and create a network topology diagram. 8. Select routing protocols and IP addressing.

6 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Example: Characterizing Applications Name of Application To/From Location Type of Application Number of Users Number of Servers Bandwidth/ Delay Tolerance/ Loss Characteristics Web Content Building 1 to Building 2 HTML/HTTP/ Java 1372 High bandwidth High delay Medium loss Order Processing Headquarters to NY Office Database5125 High bandwidth High delay Low loss Web Content San Francisco Office to Asia Pac HTML / HTTP 4272 Medium bandwidth High delay Medium loss

7 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Approximate Size of Objects Transferred Across the Network Type of DataSize in MB Text message 0.01 Spreadsheet 0.1 Computer screen0.5 Rich message1 Still image10 Multimedia object100 Database replication1000

8 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Summary The Enterprise Edge functional area contains the E- Commerce, Internet Connectivity, Remote Access and VPN, and WAN modules. Each module has unique design requirements. The Enterprise Edge module requires functionality, performance, scalability, availability, manageability, and cost effectiveness. A specific methodology can be used to create the Enterprise Edge Module design. The design is based on application characteristics, and involves selecting topology, an ISP, data link and physical layer technologies, features, specific Cisco devices, and routing protocols. The important characteristics of network applications at the Enterprise Edge are bandwidth, delay, and loss.

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