Im trying to figure out how much throughput I should see on a gigbit network with Jumbo Frames sete at 9014. What I am currently seeing is practically no difference in speed between Jumbo Frames and standard MTU. I have used Ping to verify that the packets are not fragmented but I'm really not sure where to proceed from here. Windows is showing a speed of around 19MB/s when copying a large file between 2 servers and the network card is not showing a large percentage of use in Task ManagerLee

Try FTP instead of windows file copy. FTP depends directly on TCP for connectivity so making changes to the underlying protocol will have direct effect on the throughput. the Microsoft connection between two servers adds an additional layer of some kind and is independent of the underlying transport layer. whether you use NetBEUI, IP, or IPX, Windows will still provide the same level data security. I can't tell you what to do to make the Microsoft protocol faster but i can tell you FTP will win hands down every time. Leon leonmccalla at hotmail dot com

Thanks, I have already read both of those articles. Since I am not running a core edition, making the changes was much easier since I can use the GUI, and I have verified via PING that the large packet does travel unfragmented. But I have no numbers for comparison. Without knowing what i should expect - speed wise, I have nothing to compare as a basis of my claim of the network is slow. I just have my own suspicions and no evidence.Lee

Thanks for your answer, Unfortunately not sure this really helps since the issue really is not with copy utilities per say; its just the manner in which I chose to explain my problem. I have backups using windows server occuring over the Jumbo Frame network using windows server backup (2008 R2 SP1) from virtual hyper-v machines. Although that complicates things a bit, I not sold on hyper v being an issue since performance is equally slow at the Host OS level as it is within the VM. Just trying to find basic way to test for and correct performance problems, if they truely exist. My first Goal was expressed in the 1st sentance of my original post... "what throughput should I expect with 9014 Jumbo Frame setting". Although there are many variable surely there are some common numbers to compare to determine if a problem even exists to start with. I not sure that transferring just over 50GB during a backup in 30 minutes or 120GB in 1hr 50 min is fast or slow, just need some guidelines and trouble shooting advice. Of course test equipment is limited to almost non-existance but one hast to start somewhere.Lee

Hi Lee, Thank you for your post. Generally, the speed of copy file is affected by MTU, OS version, network bandwidth, buffered I/O etc. To increase the copy file speed, you could disable tcp autotuninglevel or use some copy tools like robocopy, eseutil. Please read KB932170 and slow large file copy issues article, hope it helps you. If there are more inquiries on this issue, please feel free to let us know.Regards, Rick Tan

Hi Lee, Oh, I understand your initial goal. Of course, Jumbo Frames feature could increase the network transport speed in gigabit network. Jumbo Frames need to enabled on OS and NIC(include switch). please read this article and thread to verify if your settings correctly.Regards, Rick Tan