Date: Tue, 27 Aug 1996 12:27:14 -0700 (PDT) From: Nick Liu <nickliu@netcom.com> To: questions@freebsd.org Cc: nickliu@netcom.com Subject: UTP to UTP Networking Message-ID: <Pine.3.89.9608271248.A4766-0100000@netcom15>
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On the mailing list questions, I found: > > Date: Mon, 30 Oct 95 10:22 PST > From: pete@puffin.pelican.com (Pete Carah) > To: aevans@kaiwan.com > Cc: questions@freebsd.org > Sender: owner-questions@freebsd.org > Subject: Re: utp to utp networking ? > > > _________________________________________________________________ > > > In article <199510301804.KAA01166@kaiwan009.kaiwan.com> aevans writes: > > >This may be a little off base for this list, but . . . > > >I have two FreeBSD machines that have a 3c509 each. > >I would like to plug a RJ45 into the UTP port on each > >one and run a mini-lan between these two machines. > OK so far. > > >Has anybody done this and if so, what steps did you > >take in order to get this to work ? Is this even > >possible in this configuration (no hub) ? > > Yes. It works fine with two caveats. > > 1. You need a special crossover arrangement; Eagle electronics > (in Glendale) (at least) has plugs for this or you can make up a > custom cable. If you choose to make a custom cable MAKE SURE IT'S MARKED > because someone will get burned later if not. (I've been there several > times :-) (also, if you have coax ethernets in a video house (also been > there) make sure you get the green-colored terminators rather than plain > metal ones. The possibilities for screwups there are endless :-) > > If you're in Orange County, Marvac/Dow or Orvac *may* have these plug adapters > too. (actually you can use video cable and terminators on *short* ethernet > runs. Don't mix either cable or terms, though...) > > 2. If you take one of the machines down you'll get a console message > on the other of 'unexpected interrupt'. That can (at least for DEC 21040 > boards) safely be ignored. Hubs inhibit this message. > > -- Pete > I bought the crossover RJ45 cables and I have two PCs with FreeBSD 2.1.5. I want to set up one NIC to use: 192.168.253.9 and the other 192.168.253.10. Here's what I plan to do: On Machine A. (192.168.253.1) ---------------------------------------------------------------------- ifconfig ed0 192.168.253.9 broadcast 192.168.253.10 netmask 0xff000000 route add 192.168.253.10 192.168.253.9 On Machine B. (192.168.253.5) ---------------------------------------------------------------------- ifconfig ed0 192.168.253.10 broadcast 192.168.253.9 netmask 0xff000000 route add 192.168.253.9 192.168.253.10 Both PCs are not going out to Internet. Would the above statements work? Thanks for your input. Nick
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