Date: Sun, 09 Feb 1997 19:42:05 -0800 From: Julian Elischer <julian@whistle.com> To: John Capo <jc@irbs.com> Cc: "Daniel O'Callaghan" <danny@panda.hilink.com.au>, Bill Fenner <fenner@parc.xerox.com>, Jim Shankland <jas@flyingfox.com>, freebsd-isp@FreeBSD.ORG, bvt@mp.aha.ru, robert@nanguo.chalmers.com.au Subject: Re: I give up! no ideas left. Message-ID: <32FE990D.41C67EA6@whistle.com> References: <97Feb9.125709pst.177476@crevenia.parc.xerox.com> <Pine.BSF.3.91.970210093512.427V-100000@panda.hilink.com.au> <19970209192139.DR04830@irbs.com>
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J > > I have a version of traceroute that does MTU discovery. so I presume you'll be polishing this and submitting it to the traceroute authors? :) > > 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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