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

14 1 - OVERVIEW OF THE HP EFS WAN ACCELERATOR
 Data Transfer. The HP EFS RCU efficiently transfers data from a client to
a specified target directory on a server across the WAN. The HP EFS RCU
eliminates extra round-trips caused by Common Internet File System
(CIFS), reducing that amount of time it takes to transfer data across the
WAN.
 Auto-discovery. Auto-discovery is the process by which the HP EFS
WAN Accelerator automatically intercepts and optimizes traffic on all
Internet Protocol (IP) addresses and ports. By default, auto-discovery is
applied to all IP addresses and the ports which are not secure or
interactive.
 Fixed-Target. Fixed target rules directly specify out-of-path HP EFS WAN
Accelerators near the target server that you want to optimize. You
determine which servers you would like the HP EFS WAN Accelerator to
optimize (and, optionally, which ports), and add fixed-target rules to
specify the network of servers, ports, and out-of-path HP EFS WAN
Accelerators to use.
 Pass-Through. Pass-through describes WAN traffic that traverses the
network unoptimized. You define pass-through rules to exclude subnets
from optimization. Traffic is also passed through when the HP EFS WAN
Accelerator is in bypass mode. Pass-through might be due to in-path rules
or because the connection was established before the HP EFS WAN
Accelerator was put in place or before the HP EFS WAN Accelerator
service was enabled.
 Bypass. The HP EFS WAN Accelerator is equipped with a bypass card to
prevent a single point of failure. If there is a serious problem with the HP
EFS WAN Accelerator, it goes into bypass mode and the traffic is passed
through unoptimized.
 Failover. You can deploy redundant HP EFS WAN Accelerators in your
network to ensure optimization continues if there is a failure in one of the
HP EFS WAN Accelerators. You can enable failover support in the HP
EFS WAN Accelerator Management Console (Management Console) or
you can use the HP EFS WAN Accelerator command-line interface (CLI).
Bypass Mode The HP EFS WAN Accelerator is equipped with one of the following types of
bypass cards (depending on your order):
 Two-Port Gigabit Ethernet (Gig-E) Bypass Card
 HP EFS N4c WAN Accelerator 4-port NIC Card
 Two-Port Fiber Gigabit-Ethernet Bypass Card
For detailed information about bypass card status lights, see Appendix A,
“Status Lights, Technical Specifications, and Regulatory Information.”