Date: Sat, 7 Aug 2004 22:33:26 +0200 (CEST) From: Olaf Hoyer <ohoyer@ohoyer.de> To: Gary Aitken <garya@nightmare.dreamchaser.org> Cc: freebsd-hardware <freebsd-hardware@freebsd.org> Subject: Re: crossover cables, dec 21041 nic, fbsd vs nt Message-ID: <20040807222619.A96871@gaff.hhhr.ision.net> In-Reply-To: <200408071815.i77IFKZq000559@nightmare.dreamchaser.org> References: <200408071815.i77IFKZq000559@nightmare.dreamchaser.org>
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On Sat, 7 Aug 2004, Gary Aitken wrote: > > While waiting for a new hub to arrive, I decided to jury-rig > a workstation to the firewall freebsd box. (4.10) > Using a cat5 crossover cable, I connected the nic on an NT > box to the NIC on the freebsd box; each of these normally > goes to the hub for the internal network. > > ping... nada > > So I swapped the network cards individually with the card > serving the dsl modem; they all work. > > So I used the crossover cable to connect the NT box to > another NT box on the internal network. ping...reply > > The nic in question is an old smc 3c509b-combo card > supporting 10baseT UTP, AUI, and BNC. Hi! Well, 509b comes to mind as also a product from 3Com... > > ifconfig de0 shows: > media: Ethernet autoselect (10base2/BNC) > status: active > > The green light (indicating a live connection?) is on on both nics. > > Manually configuring the nic media type to 10BaseT/UTP made it work. So it is a PCI card, supporting 3 connectors. I had similar hassle with some 3com 509 ISA cards, where it was a pain to set the correct connector type, also regarding the correct duplex setting (full/half) > > What's different about a hub environment that allows the system > to automagically determine the media type? a hub is always half-duplex (a switch is full or half), and I also experienced some old 21040 cards that needed to be fully brought up with an IP to detect their connection status. I could guess that the NT box has some problems with the autoneg on their side, try setting it in the NT driver to a fixed speed/duplex setting. > > NT seems to have no problem, although it may be the driver is > just defaulting to the right choice in one case and the wrong > one, or none, in another. > see above, set the speed/duplex manually on both sides. HTH Olaf -- Olaf Hoyer ohoyer@gaff.hhhr.ision.net Fuerchterliche Erlebniss geben zu raten, ob der, welcher sie erlebt, nicht etwas Fuerchterliches ist. (Nietzsche, Jenseits von Gut und Boese)
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