Thursday, October 25, 2007

Why WAN optimization should be integrated with branch office routers, Part 2

Network World

Wide Area Networking




Network World's Wide Area Networking Newsletter, 10/25/07

Why WAN optimization should be integrated with branch office routers, Part 2

By Steve Taylor and Jim Metzler

In the last newsletter we began a discussion of the pros and cons of integrating WAN optimization with routers. We’ll continue the “pro” side of this discussion with more comments from Mark Weiner, director of product marketing, Cisco application networking services, with comments focusing on understanding security and VoIP benefits realized through router integrated WAN optimization.

Mark commented: “According to Infonetics market research firm, the top branch IT trend of recent years has been the integration of security technologies such as firewalls, VPNs, and intrusion detection systems (IDS) into routers. This is validated by the rapid adoption of embedded security into more than 3 million Cisco ISRs shipped. Taneja Group reached the same conclusion through its May 2007 Branch Office survey, where 250 IT directors mandated that WAN optimization preserves their integrated branch security investment. Their top IT priority for a remote-office and back-office (ROBO) solution is data security, with WAN and application optimization the next priority.

“Cisco router-integrated WAN optimization allows organizations to protect their branch security investment. The WAAS WAN optimization solution offers ISO 15408 certification, PCI 1.1 compliance regulation support through strong disk encryption, and support of router-based and stand-alone stateful firewall inspection and intrusion prevention.

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“Finally, integrating WAN optimization logically and/or directly in the router also offers the follow VoIP benefits:

- Better VoIP quality and performance through transparent integration with QoS: Integrated WAN optimization allows the router to tag the VoIP QoS once correctly, rather than creating two sets of conflicting QoS policy.
- Higher VoIP reliability through out of path deployment: Unlike in-path deployment that processes all traffic whether or not it needs optimization, out of path deployment does not introduce single point of failure, and does not introduce processing delay for VoIP that needs no optimization.
- Optimized Internet route selection: Router integrated WAN optimization offers not only application layer acceleration, but also provides Internet route optimization by selecting optimal routes to circumvent Internet congestions. This leverages the available Performance Routing (PfR) software on organizations’ existing Cisco routers, and optimizes specific applications on a link with higher security, lower cost, lower latency, or higher priority (QoS).

“By focusing on the economic, security, and VoIP benefits created through router-integrated WAN optimization, Cisco has successfully implemented its solution at thousands of sites at hundreds of customers globally.”


  What do you think?
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Contact the author:

Steve Taylor is president of Distributed Networking Associates and publisher/editor-in-chief of Webtorials. For more detailed information on most of the topics discussed in this newsletter, connect to Webtorials, the premier site for Web-based educational presentations, white papers, and market research. Taylor can be reached at taylor@webtorials.com

Jim Metzler is the Vice President of Ashton, Metzler & Associates, a consulting organization that focuses on leveraging technology for business success. Jim assists vendors to refine product strategies, service providers to deploy technologies and services, and enterprises evolve their network infrastructure. He can be reached via e-mail.



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1 comment:

Justin Lofton said...

Cisco WAAS vs Riverbed

Cisco WAAS has a way to go in my opinion.

Here are a handful of key reasons why I feel Riverbed beats Cisco.

Speed
• Cisco only has CIFS application-specific optimization (what about MAPI, HTTP, SSL, NFS, SQL, Oracle?)
• Cisco has separate ‘TCP’ optimization and ‘CIFS’ caching implementations – muddled approach

Scale
• No large-scale reference deployments – Riverbed has dozens
• Data store is per peer as opposed to universal
• No software client for mobile workers

Simplicity
• Cisco requires 95 steps to set up WAAS; Riverbed = 22
• Cisco network transparency approach can cause routing or troubleshooting problems; and CIFS is not transparent!
• “Integrated” router blade has separate management & setup


Cisco is really a caching device, Riverbed does not cache files, it accelerates apps at the bit level and stores references not the actual file. Caching is not efficient (especially as you scale it in a mesh, MPLS type environment). Caching only addresses files not email, web, and other apps. In a cache, if the file is changed then the file is cold again and has to be resent across WAN. Also, if you rename a file it again is cold and must be resent to the other side even though that data exists on the cache already.

Stick with best of breed. Riverbed Steelhead Appliances

Justin Lofton
Systems Engineer
Tredent Data Systems, Inc.
justinl@tredent.com
http://www.tredent.com