On Wed, 2004-07-28 at 11:38, Christopher A. Smith wrote: > I recently installed FC1 (still a little wary of FC2) on a workstation and > a laptop. Both had previously been running RH 9; FC1 was installed by > paving the hard drive and installing from scratch. Immediately after the > upgrade, I noticed a surge in Ethernet collisions and a corresponding > decline in network throughput and usability on both systems. Anything > that involves reading or writing more than 64k or so -- e.g., NFS work, > web browsing, Fedora updates -- results in collisions, and network > activity comes to a screeching halt for several seconds. Removing NFS all > together and working entirely off of local disk makes no difference. > (Didn't think it would, but it was worth a try.) > > Both systems had been running RH9 with the exact same hardware, and > collisions were never a problem. The laptop dual-boots Windows XP Pro, > and its network performance is what I'd expect; there's been no observable > or quantifiable difference in throughput. > > Does anyone have any ideas or suggestions on where I should look? > Problems with the driver (either) or its configuration? Or is this one of > those "Upgrade to FC2 and call us back" situations? > > Thanks! I would start by verifying the duplex settings on the NIC in the FC1 box and the port on the switch. mii-tool should let you check the setting and force it. 100Mbp connections should be set to full duplex. I have seen some cisco switches that fight with some systems (in my experience SUN servers had this problem). The auto-negotiate would not work as expected for some reason. Lock down the speed and duplex settings on the switch and the NIC to eliminate this as a possible problem. -- Scot L. Harris webid@xxxxxxxxxx One good suit is worth a thousand resumes.
