SHARE



ABOUT THE AUTHOR


Terry Slattery
Terry Slattery, is a senior network engineer with decades of experience in the internetworking industry. Prior to joining Chesapeake NetCraftsmen as...
Read Full Bio >>
SHARE



Terry Slattery | January 31, 2012 |

 
   

Correcting Network Packet Loss

Correcting Network Packet Loss When more and more video joins the network, and it is prioritized above data traffic, the data will begin to suffer from more congestion loss. That affects all productivity apps, and thus productivity suffers.

When more and more video joins the network, and it is prioritized above data traffic, the data will begin to suffer from more congestion loss. That affects all productivity apps, and thus productivity suffers.

In my last post, I described how to detect network packet loss and promised to talk about several causes of packet loss and how to fix them. The examples I have all came from real networks where I, or someone at Netcraftsmen, was working with a customer. I've written blog posts about some of the problems and the resolution of each. However, I've not put all the information in one place, which I intend to address with this blog.

Enterprise Connect in March 2012
Related to the content of this post are my presentations at Enterprise Connect 2012, March 26-29, 2012. I am hosting How To Keep Video From Blowing Up Your Network, in which I’ll talk about running a real network and how to keep video traffic from impacting the other business applications and to identify when business applications are being impacted. It is related to the congestion topic below. The second session is Network Test Tools for Voice and Video, where I will lead a panel discussion on how to use tools to diagnose problems with voice and video applications. Finally, I will be participating in John Bartlett's session on QoS & Net Design for Converged Networks. This session is always well attended because it covers a wide range of topics. I talk about resilient network design during my part of the session. All of these presentations are related to the topics in this post.

The Impact of Packet Loss on TCP
I've written about the impact of packet loss on TCP in several prior blog posts:

* http://www.netcraftsmen.net/resources/blogs/rethinking-interface-error-reports.html
* http://www.netcraftsmen.net/resources/blogs/application-performance-troubleshooting.html

The Mathis equation is an excellent way to determine the estimated packet loss of a given path. You have to know the round trip latency between the source and destination as well as the packet loss on the path to determine the maximum goodput, which is the volume of delivered user data. A graph of the resulting goodput for three different round trip times (RTT) is very informative. At 1Gbps, there is not much impact at 0.00001% packet loss. But at any higher packet loss, there is a significant reduction in goodput. Path RTT also has a big impact on goodput, as you can see in the graphs below.

Video and voice do not use TCP, so the graphs don't apply to them, but when you have significant amounts of voice and video, the other business applications that are using TCP may be impacted, depending on how you've set up QoS and allocated bandwidth. (That's the topic of my first Enterprise Connect session.)


(Click here for larger version)





COMMENTS



Enterprise Connect Orlando 2018
March 12-15 | Orlando, FL

Connect with the Entire Enterprise Communications & Collaboration Ecosystem


Stay Up-to-Date: Hear industry visionaries in Keynotes and General Sessions delivering the latest insight on UC, mobility, collaboration and cloud

Grow Your Network: Connect with the largest gathering of enterprise IT and business leaders and influencers

Learn From Industry Leaders: Attend a full range of Conference Sessions, Free Programs and Special Events

Evaluate All Your Options: Engage with 190+ of the leading equipment, software and service providers

Have Fun! Mingle with sponsors, exhibitors, attendees, guest speakers and industry players during evening receptions

Register now with code NOJITTEREB to save $200 Off Advance Rates or get a FREE Expo Pass!

November 1, 2017

Your customers (internal and external) demand that you offer them the ability to connect by any means. With the adoption of cloud communications tools you now have access to an expanded portfolio o

October 18, 2017

Microsofts recent Ignite event had some critically important announcements for enterprise communications. Namely, Microsofts new Team Collaboration offering, Teams, will be its primary communicatio

September 20, 2017

Customer experience can make or break your business. But how do you achieve outstanding customer service when you're dealing with outdated organizational structure, lagging technology, dated proces

October 23, 2017
Wondering which Office 365 collaboration tool to use when? Get quick pointers from CBT Nuggets instructor Simona Millham.
September 22, 2017
In this podcast, we explore the future of work with Robert Brown, AVP of the Cognizant Center for the Future of Work, who helps us answer the question, "What do we do when machines do everything?"
September 8, 2017
Greg Collins, a technology analyst and strategist with Exact Ventures, delivers a status report on 5G implementation plans and tells enterprises why they shouldn't wait to move ahead on potential use ....
August 25, 2017
Find out what business considerations are driving the SIP trunking market today, and learn a bit about how satisfied enterprises are with their providers. We talk with John Malone, president of The Ea....
August 16, 2017
World Vision U.S. is finding lots of goodness in RingCentral's cloud communications service, but as Randy Boyd, infrastructure architect at the global humanitarian nonprofit, tells us, he and his team....
August 11, 2017
Alicia Gee, director of unified communications at Sutter Physician Services, oversees the technical team supporting a 1,000-agent contact center running on Genesys PureConnect. She catches us up on th....
August 4, 2017
Andrew Prokop, communications evangelist with Arrow Systems Integration, has lately been working on integrating enterprise communications into Internet of Things ecosystems. He shares examples and off....
July 27, 2017
Industry watcher Elka Popova, a Frost & Sullivan program director, shares her perspective on this acquisition, discussing Mitel's market positioning, why the move makes sense, and more.
July 14, 2017
Lantre Barr, founder and CEO of Blacc Spot Media, urges any enterprise that's been on the fence about integrating real-time communications into business workflows to jump off and get started. Tune and....
June 28, 2017
Communications expert Tsahi Levent-Levi, author of the popular BlogGeek.me blog, keeps a running tally and comprehensive overview of communications platform-as-a-service offerings in his "Choosing a W....
June 9, 2017
If you think telecom expense management applies to nothing more than business phone lines, think again. Hyoun Park, founder and principal investigator with technology advisory Amalgam Insights, tells ....
June 2, 2017
Enterprises strategizing on mobility today, including for internal collaboration, don't have the luxury of learning as they go. Tony Rizzo, enterprise mobility specialist with Blue Hill Research, expl....
May 24, 2017
Mark Winther, head of IDC's global telecom consulting practice, gives us his take on how CPaaS providers evolve beyond the basic building blocks and address maturing enterprise needs.
May 18, 2017
Diane Myers, senior research director at IHS Markit, walks us through her 2017 UC-as-a-service report... and shares what might be to come in 2018.
April 28, 2017
Change isn't easy, but it is necessary. Tune in for advice and perspective from Zeus Kerravala, co-author of a "Digital Transformation for Dummies" special edition.
April 20, 2017
Robin Gareiss, president of Nemertes Research, shares insight gleaned from the firm's 12th annual UCC Total Cost of Operations study.
March 23, 2017
Tim Banting, of Current Analysis, gives us a peek into what the next three years will bring in advance of his Enterprise Connect session exploring the question: Will there be a new model for enterpris....
March 15, 2017
Andrew Prokop, communications evangelist with Arrow Systems Integration, discusses the evolving role of the all-important session border controller.
March 9, 2017
Organizer Alan Quayle gives us the lowdown on programmable communications and all you need to know about participating in this pre-Enterprise Connect hackathon.
March 3, 2017
From protecting against new vulnerabilities to keeping security assessments up to date, security consultant Mark Collier shares tips on how best to protect your UC systems.
February 24, 2017
UC analyst Blair Pleasant sorts through the myriad cloud architectural models underlying UCaaS and CCaaS offerings, and explains why knowing the differences matter.
February 17, 2017
From the most basics of basics to the hidden gotchas, UC consultant Melissa Swartz helps demystify the complex world of SIP trunking.
February 7, 2017
UC&C consultant Kevin Kieller, a partner at enableUC, shares pointers for making the right architectural choices for your Skype for Business deployment.
February 1, 2017
Elka Popova, a Frost & Sullivan program director, shares a status report on the UCaaS market today and offers her perspective on what large enterprises need before committing to UC in the cloud.
January 26, 2017
Andrew Davis, co-founder of Wainhouse Research and chair of the Video track at Enterprise Connect 2017, sorts through the myriad cloud video service options and shares how to tell if your choice is en....
January 23, 2017
Sheila McGee-Smith, Contact Center/Customer Experience track chair for Enterprise Connect 2017, tells us what we need to know about the role cloud software is playing in contact centers today.