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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!worldnet.att.net!news.mathworks.com!newsgate.duke.edu!zombie.ncsc.mil!cs.umd.edu!hecate.umd.edu!analog.eng.umd.edu!marat From: marat@Glue.umd.edu (Marat Fayzullin) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: 2.2-RELEASE + PLIP = problem Date: 19 Mar 1997 14:37:53 GMT Organization: University of Maryland, College Park Lines: 25 Message-ID: <5goto1$20g@hecate.umd.edu> References: <5gm6f1$ukc@hecate.umd.edu> <5gmguh$icd@ui-gate.utell.co.uk> NNTP-Posting-Host: analog.eng.umd.edu X-Newsreader: TIN [version 1.2 PL2] Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:37506 Brian Somers (brian@shift.lan.awfulhak.org) wrote: : The only thing I can suggest is using the -link0 option.... but I : don't expect it will help. It didn't: link0 is turned off by default :( : The only time I've seen a similar thing is with bad ip checksums - : some OSs are lazy and ignore the IP sum for speed, but FreeBSD : has always (and still does in 2.2) dropped packets with bad sums. I appear to be getting an opposite problem: all FreeBSD machines respond, but neither AIX nor router do. : What about pinging the laptop from the AIX box ? Try doing this : while running tcpdump on the lan interface on the FreeBSD gateway : (the one with the plip connection to the laptop). Do you see : the ping getting to the interface and the response coming back ? After adding an explicit route at the AIX box (route add laptop gateway) I was able to telnet back and forth between AIX and the laptop. Nevertheless, doing the same on the router only produced a one-way effect: I can telnet from the router to the laptop, but not the vice versa: the router still doesn't answer. I.e. adding routes fixes things somewhat, but it doesn't appear to have anything to do with the problem :( It is possible that I am doing something terribly wrong when establishing the link. Could somebody explain what exactly has to be done on the laptop and the gateway in order to establish PLIP connection correctly?