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From: brian@shift.lan.awfulhak.org (Brian Somers)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: 2.2-RELEASE + PLIP = problem
Date: 21 Mar 1997 14:40:06 GMT
Organization: Awfulhak Ltd.
Lines: 49
Message-ID: <5gu6k6$bm9@ui-gate.utell.co.uk>
References: <5gm6f1$ukc@hecate.umd.edu> <5gmguh$icd@ui-gate.utell.co.uk>
<5grfr6$bip@ui-gate.utell.co.uk> <5gsgpd$4pa@hecate.umd.edu>
Reply-To: brian@awfulhak.demon.co.uk, brian@utell.co.uk
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Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:37460
In article <5gsgpd$4pa@hecate.umd.edu>,
marat@Glue.umd.edu (Marat Fayzullin) writes:
> Brian Somers (brian@shift.lan.awfulhak.org) wrote:
>: If telnet from the router to the laptop works, it means packets can
>: travel both ways. Try attempting a telnet from the laptop to the
>: router and waiting for a long time. It may be the case that the
> Ok, here is what happens:
>
> 1. Doing
> ifconfig lp0 <gateway_addr> <laptop_addr> at the gateway
> 2. Doing
> ifconfig <laptop_addr> <gateway_addr>
> route add default <gateway_addr>
> at the laptop
> 3. Trying to ping/telnet/etc. gateway from the laptop --> it works
> 4. Trying to ping/telnet/etc. router from the laptop --> nothing happens
> 5. Manually adding a route to laptop at the router.
Yep, this is necessary.
> 6. Trying to ping/telnet/etc. router from the laptop --> nothing happens
???
> 7. Logging onto router and telnetting t laptop --> it works
> 8. Trying to ping/telnet/etc. router from the laptop --> it works now
And should have done last time.... does this happen if you just ping
with just IP numbers too ? It's possible that there's a DNS problem
- unrelated to the routing issue. If you just use ping and IP numbers
rather than machine names, step 6. should work first time.
>
> Any ideas? At this point I'm almost sure something is wrong in this
> sequence. The gateway has two IP addresses: Ethernet and PLIP ones.
> All addresses are taken from the same class-C group.
Can you "draw" what's going on (in ascii) ? ie. what are the IP
numbers and netmasks of each machine. It may be that the laptop
has an IP number that's part of the network that the other machines
share - this should not work.....
>
> Marat
--
Brian <brian@awfulhak.demon.co.uk> <brian@freebsd.org>
<http://www.awfulhak.demon.co.uk>
Don't _EVER_ lose your sense of humour !