CISCO WAAS – How does it Work?
There are three main components of CISCO WAAS: TFO, DRE, and Persistent LZ compression. Each of the components has its own advantages to keep your WAN, a step ahead of others.
The CISCO WAAS Transport Flow Optimization (TFO): The TFO allows quick logins and logouts – to avoid congestion with many people logging in at the beginning of their shift. In addition, it also offers protection to the data packets travelling over the WAN and reproduces copies of lost packets quickly to avoid delay in WAN response time.
The CISCO WAAS Data Redundancy Elimination (DRE): This component of the CISCO WAAS keeps an eye on all the data packets traversing across the WAN and eliminates any duplicate packet to reduce the overload – again improving congestion and thereby increasing the response time.
Persistent LZ Compression: The role of this module is to keep the bandwidth requirements down to minimum for each user. It can compress data to 5:1, based on the type of application and data in use.
Overall, all these three components offer excellent optimization of any WAN. Though, most IT organizations employ only TFO to avoid traffic congestion, including the other two components offer even more optimization to the WAN performance.
Using the TFO allows quick logins and logouts at the remote station itself, thereby reducing the lag, screen painting, and overall network congestion that occurs mostly at shift changes.
IT organizations can benefit with 85-percent or more savings on bandwidth compared to uncompressed data flows. Check out the adjacent graph to understand the savings of implementing CISCO WAAS on different WANs.
Image Courtesy: Cisco Systems