HP StorageWorks Enterprise File Services WAN Accelerator 3.0.4 installation and configuration guide (AG424-96004, March 2007)

24 2 - INSTALLING AND CONFIGURING THE HP EFS WAN ACCELERATOR
Choosing a Network Deployment
Before you begin the installation and configuration process, you need to 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