Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!ames!uhccux!munnari.oz.au!bruce!monu1!monu6!dave From: dave@monu6.cc.monash.edu.au (Dave Schwarz) Newsgroups: comp.dcom.lans Subject: Re: 10BaseT Patch Cables. Summary: multiple network cards with the same address Message-ID: <1990Nov30.042333.10276@monu6.cc.monash.edu.au> Date: 30 Nov 90 04:23:33 GMT References: <1990Nov28.171715.21137@shl.com> Organization: Monash Uni Caulfield Campus (Was Chisholm Inst of Tech) Lines: 38 I just discovered a very interesting problem. Sitting in front of me I have 2 WD8003e network cards each one has the same address 0000c0ed271c. Has anybody else come across this problem, ie more than one card with the same network address. These cards have not caused any major problems yet, excepting stuffing up the bootp tables on our Pyramid. Such that one would boot and the other one wouldn't. It took me a while to find out what the problem was, as identical network addresses were not some thing I was looking for. What I was wondering is, 1 Can novell handle 2 different stations with the same address. (I must point out that the cards where attached directly to 2 of our servers on lan A but the servers are attached to each other on lan B I guess that novell uses the subnet as part of the address so this shouldn't be a major problem unless both cards are on the same segment) 2 What does it do if it detects such a situation ? 3 How ofter does this happen ? (I've just found another 2 sets of identical cards in the bootp table but as the identical pairs are on a differnet campus, I haven't eyeballed them my self, only had some one look at them so we may have 3 pairs of cards all up, this is from orders of about 400 cards in the last 10 months) 4 I guess such cards could cause a bridge to have a hernia ?, What about a router ?. Dave.... Every thing I just said is my own view and not that of my Employer Monash University Computer Centre. -- Dave Schwarz @ Monash Uni Caulfield Campus This space now for hire 900 Dandynong Rd,East Caulfield,Vic,Australia (and I know that DANDENONG dave@monu6.cc.monash.edu.au doesn't have a Y in it !) Dave@banyan.cc.monash.edu.au Dave@vx24.cc.monash.edu.au (Yuk a vax)