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
