Date: Sun, 16 Mar 2003 15:40:03 -0500 From: Bill Moran <wmoran@potentialtech.com> To: Dan Nelson <dnelson@allantgroup.com> Cc: Olivier Dony <odony@student.info.ucl.ac.be>, Simon Barner <barner@in.tum.de>, freebsd-questions@FreeBSD.ORG Subject: Re: Too many collisions on network? Message-ID: <3E74E123.1080504@potentialtech.com> In-Reply-To: <20030316203554.GC64222@dan.emsphone.com> References: <005d01c2ebcb$82b343b0$1502a8c0@blacktrap.net> <20030316152335.GA1434@zi025.glhnet.mhn.de> <002201c2ebd3$92d0a7d0$1502a8c0@blacktrap.net> <3E74B8BC.4030009@potentialtech.com> <025601c2ebf5$5abc25f0$1502a8c0@blacktrap.net> <20030316203554.GC64222@dan.emsphone.com>
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Dan Nelson wrote: > In the last episode (Mar 16), Olivier Dony said: > >>o On the server I was talking about earlier, here is an excerpt of >> netstat while switching from half to full-duplex and back : >> >> input (Total) output >> packets errs bytes packets errs bytes colls >> 900 0 141953 1261 0 1351094 633 >> -> going full-duplex... here I guess >> 462 12 61552 546 0 649187 0 >> -> back to half-duplex with autoselect .. looks like here >> 815 0 150286 1128 0 1841082 749 >> >>The input errors and other numbers were consistent during the few >>minutes of testing in all 3 cases, but I cut it to a few lines for >>the sake of the mailing-list. Is this increase in input errors and >>drop in bytes throughput a problem? I guess the input errors are not >>good, when we can see that there are > > Input errors probably means that whatever you're plugged into does not > support full-duplex (i.e. it's a hub), which is why autoselect selected > half-duplex. You know, now that he brings this up, I tend to agree. It's possible that the hub you're plugging into is saturated: that will result in high collision rates and poor performance. You won't get anything better because that's the best the hub can do. If I'm right on this guess, you need to take it up with your ISP, as it's something they need to address. -- Bill Moran Potential Technologies http://www.potentialtech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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