On Sat, 29 Jan 2000, John Lapeyre wrote: > I have an Intel EtherExpress PRO/100 > 16 bit combo card. I am testing it > on various 10baseT hubs and with a > crossover cable directly to 100 Mbit cards.
I happen to have a ethernet only EtherExpress PRO/100, but I'm not sure it's the same type of card, there are different types of cards under the same name. Mine uses the xircom driver. > It works fine if both cards are set to 10baseT-HD > (for instance with D Becker's mii-diag program, > or through autonegotiation). I can pretty much > saturate the link. However at 10baseT-FD, I > get only about 100 KB/s (instead of 800 or 900). > Also at 100baseTx I either get 100KB/s (talking to > a card using the rtl8139 driver) or nothing > at all (talking to a DLink card that uses > via-rhine driver ). mii-diag shows that the cards are reading > each other's beat frequencies and they negotiate fine. > But if they negotiate for, or I force, 100baseTx (HD or FD) > it doesn't work. Again, if I force 10baseT-HD I get about > 800 KB/s. > I have only tried one crossover cable so far. > I have not really tested the modem, but it dials OK. I have only tested against a 3C905btx, and only HD on a switched lan, with ttcp. I found out that the card wasn't any faster on 100base than it was on 10baset, only when transmitting it was 50% faster, but at a cost of 100% CPU load... I never managed to get autonegotiation to work with this card (but gave op quite soon), so I generally only use 10base HD. > I am running a current Debian potato on a new Sager 3550 notebook. I > am running kernel 2.2.14. I have compiled all the pcmcia stuff myself. I > tried various recent pcmcia-cs and module versions, and a few recent > versions of the via-rhine driver. (I have tried the latest stable and > unstable versions, if available, from the authors' websites). > > Anyone have a clue what is going on ? Well, rememeber that a 16 bit PCMCIA bus can be compared with ISA speeds... and that's just enough to handle 10base networks. (I have a 3c515 network card too - 100basetx ISA NIC...) You do know that using Full Duplex with a HUB isn't going to work ?? -- Tot ziens, Bart-Jan
