You were right, it turned out to be a bad cable+port on the switch - rebooting the switch and changing the cable fixed it. :) Thank you! -Ahsan ----- Original Message ----- From: "Donald Becker" <becker@scyld.com> To: "Ahsan Ali" <ahsan@khi.comsats.net.pk> Cc: <linux-net@vger.kernel.org> Sent: Monday, December 03, 2001 7:25 PM Subject: Re: force media on NIC > On Sun, 2 Dec 2001, Ahsan Ali wrote: > > > I have an Etherexpress Pro/100 built into my server [Acer Altos 12000]. I > > installed RedHat 7.2 on it and everything went smoothly but I am getting > > abysmal transfer speeds through the ethernet interface. > ... > > What would be the best place to start looking? There were no collisions nor > > errors on the Ethernet interface. Ping times are perfectly normal for our > > network - 0.4ms ~ 1ms. > > What are you using to check for errors? The best way is to read the > numbers directly from /proc/net/dev, as other programs (netstat and > ifconfig) omit some errors when presenting their summary. > > > If it were a problem with media detection (the Altos server is directly > > connected to a 3COM SuperStack II 3300 in autosense mode) then I'd expect to > > see some errors on the interface, or collisions etc, but nothing seems to be > > amiss there. > > You should see collisions in normal duplex mode, and no collisions in > full duplex mode. > > Use 'mii-diag' to check the negotiated speed and duplex -- especially to > check that autonegotiation did occur. > > Don't forget obvious physical problems: mispaired cables are common > problem sources. > > Donald Becker becker@scyld.com > Scyld Computing Corporation http://www.scyld.com > 410 Severn Ave. Suite 210 Second Generation Beowulf Clusters > Annapolis MD 21403 410-990-9993 > > - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
