Date: Sun, 9 Feb 1997 19:21:39 -0500 From: jc@irbs.com (John Capo) To: danny@panda.hilink.com.au (Daniel O'Callaghan) Cc: fenner@parc.xerox.com (Bill Fenner), jas@flyingfox.com (Jim Shankland), freebsd-isp@FreeBSD.org, bvt@mp.aha.ru, robert@nanguo.chalmers.com.au Subject: Re: I give up! no ideas left. Message-ID: <19970209192139.DR04830@irbs.com> In-Reply-To: <Pine.BSF.3.91.970210093512.427V-100000@panda.hilink.com.au>; from Daniel O'Callaghan on Feb 10, 1997 10:04:38 %2B1100 References: <97Feb9.125709pst.177476@crevenia.parc.xerox.com> <Pine.BSF.3.91.970210093512.427V-100000@panda.hilink.com.au>
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Quoting Daniel O'Callaghan (danny@panda.hilink.com.au): > > Well, that really sounded like it would be solve the problem, but as the > traces below show, it did not quite work. Is there any way to set Don't > Fragment in traceroute? > I have a version of traceroute that does MTU discovery. traceroute to nanguo.chalmers.com.au (203.1.96.5), 30 hops max, 8192 byte packets 1 MTU=8166 MTU=4352 MTU=2002 MTU=1492 davsys-gw.davsys.com (199.182.75.1) 6 ms 4 ms 4 ms 2 198.211.141.1 (198.211.141.1) 345 ms 338 ms 338 ms 3 h4-0-mae-west.netcom.net (163.179.232.90) 345 ms 345 ms 345 ms 4 cpe1.hay.mci.net (198.32.136.72) 348 ms 343 ms 344 ms 5 core3-hssi2-0.SanFrancisco.mci.net (204.70.1.13) 379 ms 380 ms 378 ms 6 204.70.2.174 (204.70.2.174) 560 ms 398 ms 444 ms 7 204.70.2.174 (204.70.2.174) 431 ms 375 ms 384 ms 8 labtam.SanFrancisco.mci.net (204.189.216.150) 618 ms 575 ms 628 ms 9 bc1-f10-s2-3.Brisbane.aone.net.au (203.102.128.213) 649 ms 636 ms 661 ms 10 max1.Mackay.aone.net.au (203.61.61.129) 913 ms 721 ms 734 ms 11 * max1.Mackay.aone.net.au (203.61.61.129) 720 ms !M=296 733 ms !M=296 11 MTU=296 eros.chalmers.com.au (203.1.96.4) 758 ms * 756 ms 12 nanguo.chalmers.com.au (203.1.96.5) 753 ms 837 ms 763 ms Tcpdump shows that max1.Mackay.aone.net.au is responding correctly. 19:15:51.031682 max1.Mackay.aone.net.au > irbs.irbs.com: icmp: chalmers.com.au unreachable - nee d to frag (mtu 296) John Capo
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