3Copyright © 2000 - 2005 KEMP Technologies, Inc. All Rights Reserved.TABLE OF CONTENTSSECTION I. APPLICATION GUIDE ....................................................................................................8A. Preface ........................................................................................................................................81. Foreword .................................................................................................................................82. The LoadMaster Documentation ..................................................................................................83. Typographical Conventions .........................................................................................................84. Glossary and Abbreviations ........................................................................................................8B. Overview of the LoadMaster ........................................................................................................91. Load Balancing and it’s Benefits ..................................................................................................92. Considerations in Getting Started .............................................................................................. 103. A Simple Balancer Configuration................................................................................................ 114. LoadMaster Load Balancer Features ........................................................................................... 12C. LoadMaster Network Topologies................................................................................................141. One-Armed Balancer ............................................................................................................... 142. Two-Armed and Multi-Armed Balancer ....................................................................................... 143. Direct Server Return – DSR example .......................................................................................... 15D. Miscellaneous Networking Issues ..............................................................................................161. S-NAT ................................................................................................................................... 162. Default Gateway and Routes..................................................................................................... 17E. Single/Dual Unit Configurations ................................................................................................181. Single Unit Configuration.......................................................................................................... 182. High Availability (HA) Configuration ........................................................................................... 18F. Balancing Methods......................................................................................................................191. Round Robin .......................................................................................................................... 192. Weighted Round Robin............................................................................................................. 203. Least Connection .................................................................................................................... 204. Weighted Least Connection....................................................................................................... 205. Agent Based Adaptive Balancing................................................................................................ 20G. Layer 4 Persistency ....................................................................................................................211. Source IP Address Based Persistency ......................................................................................... 21