Solved

QoS versus bandwidth optimization appliance

Posted on 2014-02-15
3
350 Views
Last Modified: 2014-03-02
I read some white papers on Cisco qos on the 3750X and I saw vendors like Procera and Bluecoat that have bandwidth optimization appliance. So my questions are:
- what is the difference between Cisco qos and those vendors?
- Which one is better?
- If I have Cisco qos implemented on my switches, do I need those appliances and vice versa.

I know that Cisco qos on the switches is a software implementation. I guess those vendors are software and hardware.

Thanks
0
Comment
Question by:leblanc
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 57

Assisted Solution

by:giltjr
giltjr earned 500 total points
ID: 39862161
Basically QOS helps decide who gets to jump to the front of the line if there is traffic queued up.

This can can be within your LAN and/or over a private WAN link.

Bandwidth optimization helps optimize the use of bandwidth on a WAN link.  This is accomplished in various ways such as:

     file caching
     dynamic data compression as it flows over the WAN
     optimizing TCP window sizes

Which is better, it depends on what you are trying to do and where.  Bandwidth optimization only works on WAN links and requires hardware at each end of the WAN.  Typically is only a big advantage on "slow" WAN links.  Most implementations are greate for T1/E1's, not bad on DS3, but start to have limited help once you get to 100Mbps or above.  However they do work over VPN's over the Internet.

QOS  works on LAN and/or private WAN's, but will not work over the Internet.  It may help some on VPN's over the Internet.  But once traffic hit the Internet QOS is ignored.
0
 
LVL 1

Author Comment

by:leblanc
ID: 39862210
"they do work over VPN's over the Internet." So let say I am using VoIP through site to site VPN via the Internet. How will the bandwidth optimization help? Thx
0
 
LVL 57

Accepted Solution

by:
giltjr earned 500 total points
ID: 39862227
Bandwidth optimization is typically for HTTP, FTP, file sharing type traffic.

However there is some products out there now that will try and compress the VoIP traffic to reduce the amount of bandwidth it needs.

So it really does not "optimize" the bandwidth, but reduced the bandwidth required.
0

Featured Post

Create the perfect environment for any meeting

You might have a modern environment with all sorts of high-tech equipment, but what makes it worthwhile is how you seamlessly bring together the presentation with audio, video and lighting. The ATEN Control System provides integrated control and system automation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Meet the world's only “Transparent Cloud™” from Superb Internet Corporation. Now, you can experience firsthand a cloud platform that consistently outperforms Amazon Web Services (AWS), IBM’s Softlayer, and Microsoft’s Azure when it comes to CPU and …
PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question