Thank you very much. I used "ping -f do -l 9000 IP" to determine whether my path is clear. Seems to be fine. Is it good enough to make sure PATH is clear for larger MTUs.
After enabling jumbo frames, i could see SEND queue is growing compared to receiver's queue. I used "netstat -anp --inet". Virtually, RECV queue is empty. Thanx Tharindu On 7/25/07, Jesper Juhl <[EMAIL PROTECTED]> wrote: > > On 25/07/07, Tharindu Rukshan Bamunuarachchi <[EMAIL PROTECTED]> > wrote: > > Dear All, > > > > What is the best way to enable Jumbo in Linux? > > Set your MTU to 9000 on all equipment in the network path that needs > to use jumbo frames. That means all network interface cards, all > switches, routers etc need to be using an MTU of 9000 - if just a > single link between the two hosts communicating are using a lower MTU > (like the standard 1500), then that part of the path will cause your > jumbo frames to be broken up into smaller chunks and then all bets are > off. > > You'll also discover that not all network equipment (or drivers) > handle Jumbo Frames equally well. > > Adjusting socket buffer sizes can help performance a bit. > > Different TCP congestion control modules can also be used to tweak > performance for a specific need. In "menuconfig" look at: > "Networking" --> "Networking options" --> "TCP: advanced congestion > control" > > Some links you may find useful : > http://www-128.ibm.com/developerworks/linux/library/l-hisock.html > http://sd.wareonearth.com/~phil/jumbo.html > http://datatag.web.cern.ch/datatag/howto/tcp.html > > > -- > Jesper Juhl <[EMAIL PROTECTED]> > Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html > Plain text mails only, please http://www.expita.com/nomime.html > -- Tharindu Rukshan Bamunuarachchi i want to believe it; unless otherwise
