On Wednesday 14 March 2007 12:02, Uwe Thiem wrote: > On 14 March 2007, Alan McKinnon wrote: > > Hi all, > > > > Why am I always the one to get the wierd hardware issues? Here's my > > latest. The powers that be at work made me move my desk, and dhcpcd on > > *this* laptop doesn't work at *this* network point, or any of the other > > four in this row of desks, althought hey work OK on Windows. It's most > > certainly a cabling issue, I can go to the server room and plug a > > flylead into the *same*port* on the switch and it all works right. A > > static ip isn't an easy option as I move between different networks and > > don't want to have to keep editing resolv.conf. I'm not allowed to do > > my first reaction, which is to swap my outlet with a working one... > > > > tcpdump shows me this when I insert the network cable: > > 16:11:06.855229 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, > > Request [|bootp] > > repeated 6 more times then it times out > > > > With a static ip, I do get full bandwidth, error free, just like it > > should be. So whatever this cabling issue is, it affects only bootp... > > > > hardware: Dell Latitude D810: > > NIC: 02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5751 > > Gigabit Ethernet PCI Express (rev 01) Gigabit Ethernet is liminted to 25 meters for full speed. It sounds like you are to far from swich. Force the card to do 100mps this should do it. Also if your building is old enough the wire is probly CAT5 100 Mps(300 meters) raited CAT6 is needed for 1000mps. But the 25 meter limitation is still there with CAT6 cable. The CAT 5 will give you less than the rated distance for 1000 Mps. I beleve that the (gag) windows box is forcing the card to connect at a lower speed during DHCP request. On windows ( without software) You realy can't test network speed. But I don't know how to tell your card to switch to 100 Mps on Gentoo.
Rob Intel Network Certified Engineer -- gentoo-user@gentoo.org mailing list
