Re: Troubleshooting TCP performance tutorial

2010-09-18 Thread Michael Painter
Abel Alejandro wrote: Greetings, This past week I have been trying to find the root cause of tcp performance problems of a few clients that are using a third party metro Ethernet for transport. RFC2544 tests (Layer 2) and iperf using UDP give good symmetric performance almost 100% the speed of t

Re: Troubleshooting TCP performance tutorial

2010-09-18 Thread Brandon Galbraith
On Saturday, September 18, 2010, Kevin Oberman wrote: > > You might look at http://fasterdata.es.net. A lot of it is aimed at very > large volume data transfers, but quite a bit is relevant to all TCP > issues. > -- > R. Kevin Oberman, Network Engineer > Energy Sciences Network (ESnet) > Ernest O.

Re: Troubleshooting TCP performance tutorial

2010-09-17 Thread Kevin Oberman
> Date: Fri, 17 Sep 2010 20:06:09 -0400 > From: "Abel Alejandro" > > Greetings, > > This past week I have been trying to find the root cause of tcp > performance problems of a few clients that are using a third party metro > Ethernet for transport. RFC2544 tests (Layer 2) and iperf using UDP giv

Re: Troubleshooting TCP performance tutorial

2010-09-17 Thread Joe Hamelin
http://www.amazon.com/Wireshark-Network-Analysis-Official-Certified/dp/1893939995 Spendy but looks good. I'll have to pick it up when the next consulting check comes in. Thanks! I was sad to see that Eric Hall's book was out of print. At least cheap used copies are available. I forgot my copy a

Re: Troubleshooting TCP performance tutorial

2010-09-17 Thread Tim Eberhard
To add on to that. Recently Wireshark Network Analysis was released. It's an excellent book covering wireshark and reading packet captures in general by Laura Chappell. I just finished reading it and I have to say it's an excellent book. Highly recommended. Between those two books I think you'll b

Re: Troubleshooting TCP performance tutorial

2010-09-17 Thread Joe Hamelin
In a situation like yours I found Internet Core Protocols: The Definitive Guide by Eric Hall an easy to read guide to insuring that what you are seeing via wireshark. I was able to find an issue with the DF bit in a load balancer that was causing confounding headaches in a network using wireshark

Troubleshooting TCP performance tutorial

2010-09-17 Thread Abel Alejandro
Greetings, This past week I have been trying to find the root cause of tcp performance problems of a few clients that are using a third party metro Ethernet for transport. RFC2544 tests (Layer 2) and iperf using UDP give good symmetric performance almost 100% the speed of the circuit. However all