Date: Tue, 3 Jun 1997 19:41:59 +0200 (MET DST) From: Guido van Rooij <guido@gvr.win.tue.nl> To: dg@root.com Cc: FreeBSD-hackers@FreeBSD.ORG Subject: Re: ethernet card incompatibilities? Message-ID: <199706031741.TAA29043@gvr.win.tue.nl> In-Reply-To: <199706031039.DAA06008@implode.root.com> from David Greenman at "Jun 3, 97 03:39:38 am"
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David Greenman wrote: > >I've got a network with bothe an old 8 bit smc 8003 card > >on it and a Digital DC21041 on it. > > If it's an 8003, then it's a Western Digital, not an SMC, right? > > >When I have data transfers going on from the DEC card to the SMC card, > >I am seeing input errors on the SMC card. Is this a known incompatibility? > >The erros are not all equal. I'm seeing : 81, 86, a1, 21 and 1 > >(see if_edreg.h at 'Receiver Status Register (RSR) definitions' > >for an explanation of these errors). > > Hmmm. This sounds like a cabling problem like a crushed ethernet coax > cable or something - especially since you're seeing CRC and frame alignment > errors. I just checked again. This is my setup A <-coax-> hub ---- hub C and via coax C B is the one with the digital card. C is a slow thing Ftp-ing of /kernel to /dev/null 1 From A to B: 580KB/sec 2 From B to A: 40KB/sec (with input errors on A) 3 From B to C: 180KB/sec (with input errors on C) 4 From C to B: 370KB/sec 5 From A to C: 170KB/sec (with input errors on C) 6 From C to A: 370/sec (no input errors) >From 1 we can derive that the coax between A and the hub is okay >From 4 and 6 I can derive that the coax between the hub and C is correct. Then from 5 I can derive that is either hub or the UTP in between. Regarding the UTP cable: it is not in the direction of the hub for host A to the hub for host B as then also 1 should give input errors. But also not in te otehr direction as I've would have seen errors in 6. I also think the hubs are okay for similar reasons... Is there anyway I can *really* check teh cables? (I have a simple UTP test thang and that tells me the cable is okay)... -Guido
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