On Wed, 2003-11-26 at 06:04, Erik Myllymaki wrote: > a little anecdote - > > I am running LTSP latest version on a VMWare server. I had set the NIC up to > Autonegotiate- it was (autonegotiating* to 100MB/full-duplex. thingsw were > running well with 15 clients. > > I had heard a recent tale of someone having trouble when using > *autonegotiate* with a cheap Linksys 100Base-T switch (which is what I am > using while in developement) and so I got smart and switched the adpater to > 100Base-T Full Duplex explicitely - I turned OFF the autonegotiate option. > > Well, two days later I couldn't figure out why I was getting poor > performance on my clients. Opera7 was taking 25 seconds to load where before > it was up and running in 2-3 seconds. To make a long story short, I spent 2 > hours fooling around with software, before I realized that my Linksys switch > was showing *half-duplex* for the LTSP NIC. I reset the NIC to Autonegotiate > and now, all is well again. > > The difference in performance between full and half duplex makes me think > that a Switch over a Hub is a necessity.
if you force your link to 100 full-duplex you have to do so at both ends of the cable. Nic and Switch-port. If you have forced in one end of the kable and autonegotiation in the other. the autonegotiation end allways sets half duplex and you'll get poor performance. (as you saw) i recomend to keep you'r setting at autonegotation. Since i doubt a cheep switch have a management interface for you to lock speed and duplex in anyway. (look for a serial port interface on you'r switch) if you can choose. Always choose a switch. only thing i use hub's for today are decoration. -- Ronny Aasen ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
