TAILIEUCHUNG - Enterprise Data Center Wide Area Application Services (WAAS) Design Guide

This document offers guidelines and best practices for implementing Wide Area Application Services (WAAS) in enterprise data center architecture. Placement of the Cisco Wide Area Engine (WAE), high availability, and performance are discussed for enterprise data center architectures to form a baseline for considering a WAAS implementation. | Enterprise Data Center Wide Area Application Services WAAS Design Guide This document offers guidelines and best practices for implementing Wide Area Application Services WAAS in enterprise data center architecture. Placement of the Cisco Wide Area Engine WAE high availability and performance are discussed for enterprise data center architectures to form a baseline for considering a WAAS implementation. Contents Introduction 3 Intended Audience 4 Caveats and Limitations 4 Assumptions 4 Best Practices and Known Limitations 4 DC WAAS Best Practices 4 WAAS Known Limitations 5 WAAS Technology Overview 5 WAAS Optimization Path 8 Technology Overview 11 Data Center Components 11 Front End Network 12 Core Layer 13 Aggregation Layer 13 Access Layer 13 Back-End Network 14 SAN Core Layer 14 SAN Edge Layer 15 WAN Edge Component 15 1111 111 CISCO. Americas Headquarters Cisco Systems Inc. 170 West Tasman Drive San Jose CA 95134-1706 USA 2007 Cisco Systems Inc. All rights reserved. Contents WAAS Design Overview 16 Design Requirements 16 Design Components 16 Core Site Architecture 16 WAE at the WAN Edge 17 WAE at the Aggregation Layer 17 WAN Edge versus Data Center Aggregation Interception 18 Design and Implementation Details 19 Design Goals 19 Design Considerations 19 Central Manager 19 CIFS Compatibility 20 Interception Methods 20 Interception Interface 22 GRE and L2 Redirection 23 Security 24 Service Module Integration 25 WAE Network Connectivity 30 Tertiary Sub-interface 31 High Availability 31 Scalability 33 Implementation Details 35 Central Manager 35 WAE at the WAN Edge 35 Sub-Interface 37 Interception Interface 38 GRE Redirection 38 High Availability 38 WAE at Aggregation Layer 40 Interception Interfaces and L2 Redirection 41 Mask Assignments 42 WCCP Access Control Lists 42 Redirect exclude in 42 WCCP High Availability 43 WAAS with ACE Load Balancing 43 Appendix A Network Components 48 Appendix B Configurations 48 WAE at WAN Edge 48 DC-7200-01 48 Enterprise Data Center .

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