HP StorageWorks Enterprise File Services WAN Accelerator 2.1 Installation and Configuration Guide (November 2005)

24 2 - INSTALLING AND CONFIGURING THE HP EFS WAN ACCELERATOR
Choosing a Network Deployment
Before you begin the installation and configuration process, select a network
deployment:
 Physical In-Path. In a physical in-path deployment, the HP EFS WAN
Accelerator is physically in the direct path between clients and servers.
The clients and servers continue to see client and server Internet
Protocol (IP) addresses. Physical in-path configurations are suitable for
any location where the total bandwidth is within the limits of the
installed HP EFS WAN Accelerator.
Figure 2-1. Physical In-Path Deployment
 Logical In-Path. In a logical in-path deployment, the HP EFS WAN
Accelerator is logically in the path between clients and servers. In a
logical in-path deployment, clients and servers continue to see client
and server IP addresses. This deployment differs from a physical in-
path deployment in that a packet redirection mechanism is used to
direct packets to HP EFS WAN Accelerators that are not in the physical
path of the client or server. Redirection mechanisms include Layer-4
switches, Web Cache Communication Protocol (WCCP), and Policy
Based Routing (PBR). For detailed information about configuring the
HP EFS WAN Accelerator in a logical in-path deployment, see the HP
EFS WAN Accelerator Deployment Guide.
Figure 2-2. Logical In-Path: WCCP Deployment
Client
Switch
HP EFS WAN
Accelerator
Router
Router
Accelerator
HP EFS WAN
Switch
Server
HP EFS WAN
Accelerator
Router
Switch
Client