WAN Acceleration Overview

The WAN Acceleration service allows you to accelerate WAN traffic between a central site and a branch site by using Transmission Control Protocol (TCP), and Windows File Sharing (WFS). The Dell SonicWALL WXA series appliance is deployed in conjunction with a Dell SonicWALL NSA series appliance. In this type of deployment, the NSA series appliance provides dynamic security services, such as attack prevention, Virtual Private Network (VPN), routing, and Web Content Filtering. The WAN Acceleration service can increase application performance.

WXA Clustering

NOTE: WXA Clustering is supported on NSA 2600 and higher appliances.

SonicOS supports WXA Clustering with two or more appliances. The largest Dell SonicWALL WXA appliances can support up to 1200 connections, which roughly translates into support for as many as 240 concurrent users. The number of supported users is now increased with WXA Clustering:

•	SonicOS can monitor or probe multiple WXA appliances simultaneously and store a friendly name for each WXA.

•	SonicOS implements three forms of load sharing: TCP Acceleration, Unsigned SMB acceleration, and Web Cache.

•	A VPN Policy can be assigned to always use the same WXA group.

•	The number of connections is spread equally across all WXA appliances in a group.

•	When one of the WXAs reaches the connection capacity, the next WXA in the group is used.

WAN Acceleration management interface pages

This section contains a brief overview of the following WAN Acceleration management interface pages:

•	WAN Acceleration > Status

•	WAN Acceleration > TCP Acceleration

•	WAN Acceleration > WFS Acceleration

•	WAN Acceleration > Web Cache

•	WAN Acceleration > System

•	WAN Acceleration > Log

For detailed information about the WAN Acceleration service, clustering, and configuration procedures, see the Dell SonicWALL WXA Administrator’s Guide, which you can access at:

https://support.software.dell.com/release-notes-product-select