Date: Fri, 03 May 2002 13:59:27 -0400 From: Jeff Heath <jheath@scientificdevices.com> To: freebsd-questions@FreeBSD.ORG Subject: How do I shut off auto-negotiation on my NIC Message-ID: <ENEDKLCMHCJNPBEJJMJACEKACCAA.jheath@scientificdevices.com>
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I'm a newbie to BSD. Installed 4.0 GENERIC on a Dell Optiplex with a 3Com 3c905b Ethernet card. When I performed the initial installation, I selected auto-negotiation and listed 100BaseTX Full-Duplex as my first choice. Now I want to force the card to 10baseT/UTP half-duplex. I tried using ifconfig. I input the following command: ifconfig xl0 media 10baseT/UTP. Here's the output xl0: flags=8842<BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 00:c0:4f:8b:93.dd media 10baseT/UTP (100baseTX <Full-duplex>) status: active supported media: autoselect 100baseTX <Full-duplex> 100baseTX 10baseT/UTP <Full-duplex> 10baseT/UTP 100baseTX <hw-loopback> I don't have any test equipment to verify for certain that the card is operating at 100baseTX <Full-duplex>, but I am very confident that this is the case. Here's why: The lights on the Linksys router I have it connected to show 100M Full-duplex operation (and when the BSD machine is plugged in there, everything works fine - I can surf the 'net, etc.) If I connect the BSD machine to my Cisco 2610 router. It won't auto-negotiate to 10MB half-duplex If I connect the BSD machine to my Win2k machine with the NIC set at 10Mb half, the BSD machine WILL auto-negotiate to 10MB. I know this to be true because I get the following output from ifconfig xl0: xl0: flags=8842<BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 00:c0:4f:8b:93.dd media 10baseT/UTP status: active supported media: autoselect 100baseTX <Full-duplex> 100baseTX 10baseT/UTP <Full-duplex> 10baseT/UTP 100baseTX <hw-loopback> note the absence of the (100baseTX <Full-duplex>) statement. Also, if I connect the BSD machine to the Cisco 2610 router after it negotiated to 10MB half-duplex, all is well. So, the REAL problem is that the Cisco 2610 router does not auto-negotiate properly. This is no surprise. I can work around my problem, but it's a nuisance, and I would like to know the proper way to completely rid myself of auto-negotiation anyway. Thanks in advance for any suggestions. Jeff Heath To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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