Date: Sat, 10 Aug 2002 05:02:53 -0700 From: Kent Stewart <kstewart@owt.com> To: Janne Mattila <jannemat@saunalahti.fi> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: [freebsd-questions] Slow download from FreeBSD 4.6-RELEASE server; LNE100TX and 3Com 3c905C-TX Message-ID: <3D5500ED.4030204@owt.com> References: <003401c24043$ccb70c50$9a51c5c3@Kompuutteri>
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Janne Mattila wrote: >>Sounds like a problem with duplex settings. You've got a hub >>in between the two machines, don't you? >> > > Our LAN has 100MB Hub, where my NIC, my girlfriend NIC and of course > server's second NIC is connected. > > My network is: > > FreeBSD Server (which has two 3c905C-TX NIC) > Workstation: Win2000 SP2, LNE100TX NIC (My own) > Workstation: Win2000 SP2, KNE100TX NIC (My girlfriend) > Laptop, HP X3, Win2000, LiteOn Mini PCI or something > > [10MB Line] <-> FreeBSD, NIC #1 Internet IP, NIC #2 192.168.0.1 <-> HUB > <-> Mine and girlfriend machines > > >>Aha! Almost certainly a problem with duplex settings here. >> > > Strange... I checked all available modes with "ifconfig -m xl1" (which > is our LAN NIC) and changed media setting, then I changed my own > win2000 workstation NIC mode and tried FTP, no effect, changed again own > NIC media, no effect, went through all media modes on my own > workstation, no go. Then I changed server media to another, went through > all my workstation NIC mediamodes again, ... basically I tried with all > available configuration. Still poor FTP speed, hmm. Yesterday I was having download problems (8KB/s) using a 3Com (xl). Ifconfig said it was full duplex but my switch said it wasn't. I was using an old config file and created a new config. Then, I built a new kernel and rebooted and the switch now shows full-duplex. I also get 10+MB/s xfers from my other computers. I had also lost power to the switch and it may have needed reinitializing from the 3Com side. I downed the interface and uped it but that didn't do any good. Kent > > Maybe I have forgot somehow one combination then. > > >>When you download from the server, the TCP ACKs will come >>back almost instantaneously, thus colliding with the next data packet. >> > > OK. Yes I have noticed some collision by time to time, from HUB leds. > When downloading from Internet, tcpdump did not report any collision > though, think I need to test when downloading from LAN. > > But how TCP ACKs are different when downloading from Internet / LAN? > Since I am *always* downloading from server, because it is our gateway. > And via same NIC also. > > >>It may just have defaulted to a different set of Ethernet >>settings. >> > > What setting should work? I'm thinking of changing my NIC to another. It > is pretty old, and only NIC which has problems in our network. > > Thanks for reply! > > - JM > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > > . > > -- Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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