From owner-freebsd-questions Sat Jan 11 21:22:53 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id VAA04804 for questions-outgoing; Sat, 11 Jan 1997 21:22:53 -0800 (PST) Received: from root.com (implode.root.com [198.145.90.17]) by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id VAA04790 for ; Sat, 11 Jan 1997 21:22:49 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by root.com (8.7.6/8.6.5) with SMTP id VAA23974; Sat, 11 Jan 1997 21:20:01 -0800 (PST) Message-Id: <199701120520.VAA23974@root.com> X-Authentication-Warning: implode.root.com: Host localhost [127.0.0.1] didn't use HELO protocol To: "Adam W. Hawks" cc: questions@freebsd.org Subject: Re: How do I set 100MB mode on fxp0 In-reply-to: Your message of "Sat, 11 Jan 1997 23:59:16 EST." <199701120459.XAA25489@pent.vnet.net> From: David Greenman Reply-To: dg@root.com Date: Sat, 11 Jan 1997 21:20:01 -0800 Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >> >I have a Intel EtherExpress Pro 100b card and can't get it do >> >talk at any speed but 10MB. What do I have to do to get it in >> >100MB mode. >> > > (snip) >> >> Do you have a 100Mbit switch? You can't do both modes without a switch. > >no. There is no jumpers or switches on the card. :-) Uh, that's not what I meant. An ethernet switch is a special device that does packet-level switching and has significant performance advantages over a non-switching ethernet hub. It also allows for ethernet bridging, and as a side-effect, can simultaneously support both 10Mbit and 100Mbit ethernet. >> If you have the machine connected by a cross-over cable, be warned that the >> Pro/100B's auto speed detection doesn't deal with this correctly when the >> cards on both ends are Pro/100B's. It does seem to work when one card is >> a DEC chip based card, however. > >Both ends are Pro/100B's. Does that mean I will not be able to get it to >work in 100MB mode? Are they connected by a cross-over cable or a hub? If they are connected by a cross-over cable, then the answer is no, you'll need to at least get a 100Mbit hub. I complained to Intel about this deficiency a long time ago and was told that "cross-over cables aren't supported". >Also does the Berkley Packet filter's make it default to 10MB. The file >if_fxp.c makes it look like it does? BPF has nothing to do with the interface speed. I think you're probably refering to the device class, which is DLT_EN10MB and serves double-duty for both 10 and 100Mbit ethernet. In any case, this is only used to identify the link-layer encapsulation type for BPF. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project