Date: Thu, 14 Aug 1997 18:40:03 PDT From: Bill Fenner <fenner@parc.xerox.com> To: fenner@parc.xerox.com, jkh@time.cdrom.com Cc: current@freebsd.org, wollman@freebsd.org Subject: Re: Well, I guess it's about time I mentioned this little problem... Message-ID: <97Aug14.184012pdt.177512@crevenia.parc.xerox.com>
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>> My bet is broken path mtu discovery in the opposite direction. > >Sounds quite plausible to me. Erm... So, what now? :-) Uh... good question. It doesn't seem to be anything wrong with your configuration, since the traceroute from TCP/IP Illustrated v1 can discover your PMTU from here: traceroute to time.cdrom.com (204.216.27.226), 30 hops max outgoing MTU = 1500 1 ciscokid (192.216.54.234) 9 ms 4 ms 4 ms 2 0 (131.119.38.165) 17 ms 19 ms 16 ms 3 paloalto-br2.bbnplanet.net (131.119.0.194) 16 ms 16 ms 16 ms 4 sanjose1-br1.bbnplanet.net (4.0.1.9) 18 ms 18 ms 19 ms 5 198.32.136.10 (198.32.136.10) 21 ms 22 ms 24 ms 6 165.113.0.249 (165.113.0.249) 25 ms 29 ms 24 ms 7 165.113.55.2 (165.113.55.2) 43 ms 30 ms 44 ms 8 165.113.118.2 (165.113.118.2) 43 ms 38 ms 49 ms 9 hub.FreeBSD.ORG (204.216.27.18) 42 ms 52 ms 43 ms 10 hub.FreeBSD.ORG (204.216.27.18) 36 ms fragmentation required and DF set, next hop MTU = 552 10 jkh-sl0-h.cdrom.com (204.216.27.194) 173 ms 169 ms 174 ms 11 time.cdrom.com (204.216.27.226) 182 ms 178 ms 180 ms The only other thing to do is to complain to the administrators of rocky.sunlabs.com and ask them to fix their network or host implementation. Last time I tried to find someone at sunlabs.com to talk to about their strange FTP server, I ended up hitting a "don't bother us, we don't have time to support this service" wall... Bill
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