Date: Fri, 20 Dec 2002 22:47:18 +0000 From: redjupiter <redjupiter@ntlworld.com> To: "Scott M. Nolde" <scott@smnolde.com> Cc: David Wolfskill <david@catwhisker.org>, freebsd-stable@FreeBSD.ORG Subject: Re: fxp0 device - Intel NIC Message-ID: <3E039DF6.7020706@ntlworld.com> References: <200212201615.gBKGF7IB016865@bunrab.catwhisker.org> <3E039092.2030609@ntlworld.com> <20021220215907.GE67177@smnolde.com>
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Scott M. Nolde wrote: >redjupiter(redjupiter@ntlworld.com)@2002.12.20 21:50:10 +0000: ><snip> > > > >>HI Again, >> >>Sorry, was dragged out to continue christmas shopping by the wife :-) >> >>OK, I guess I can do that. My understanding was that each NIC has its >>own unique MAC address and not two cards may have the same address. so >>what you are saying now is that it's ok as long as they are on different >>networks. I never understood it that way. >> >>I also understood that the MAC address is hard wired, i.e builtin in the >>card. I know I sound confused, I don't just want to do it but I want to >>understand it as well. I know some cards on soem embedded systems >>have/must have the last three digits to be unique and so the programmer >>is allowed to assign his own first three digits. >> >>Sorry to dwell on this but I really want to understand it. >> >>thanks. >> >> > >The MAC address must be unique to the network, as mentioned before, as the >MAC address on a packet is only good until the next router, when it's >changed for the next hop. You are correct in that the MAC is hardcoded, >but that does not mean that you can't override it in software (which is >what is suggested). More technical info can be found in any book >explaining how TCP/IP works. > >Go ahead and try it... change the MAC to that of the realtek with the >/etc/start_if.fxp0 file and see how it works. > > Hi again, It works jolly good. I did what you said and then reversed the calls in rc.conf and swapped the cables of course (the second time that is ;-) ) and hey presto. Thank you all. I actually learned something, and this has never occured to me :-) thanks To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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