HP StorageWorks Enterprise File Services WAN Accelerator 3.0.4 deployment guide (AG421-96001, March 2007)

36 4 - OUT-OF-PATH NETWORK DEPLOYMENTS
Typically, in an out-of-path deployment, the client-side HP EFS WAN Accelerator is
configured as an in-path device, and the server-side HP EFS WAN Accelerator is
configured as an out-of-path device.
Figure 4-1. Physical Out-of-Path Deployment
Out-of-Path, Failover Deployment
An out-of-path, failover deployment serves networks where an in-path deployment is
not an option. This deployment is cost effective, simple to manage, and provides
redundancy.
In an out-of-path, failover deployment, two HP EFS WAN Accelerators are deployed.
When both HP EFS WAN Accelerators are functioning properly, the connections
traverse the master appliance. If the master HP EFS WAN Accelerator fails,
subsequent connections traverse the backup HP EFS WAN Accelerator.
When the master HP EFS WAN Accelerator is restored, the next connection traverses
the master HP EFS WAN Accelerator. If both HP EFS WAN Accelerators fail, the
connection is passed through unoptimized to the server.