[2174] in linux-net channel archive
RE: Very very bizzare networking problem
daemon@ATHENA.MIT.EDU (ATPlack@scj.com)
Wed Mar 20 11:02:03 1996
From: ATPlack@scj.com
Date: 20 Mar 96 09:31:42 -0600
To: alan@cymru.net, blizzard@odin.nyser.net
Cc: linux-net@vger.rutgers.edu
Two identical IP addresses on the Physical segment that you are having
problems with. If you can RARP the address with the Linux box off. This
will give you the MAC of the board causing the problem.
The connection was refused due to the other IP station replying to your
address.
The 1.3.57 code is helping because of the new way that the NET code is
written.
Good luck.
----------
From: blizzard@odin.nyser.net
To: alan@cymru.net
Cc: linux-net@vger.rutgers.edu
Subject: Very very bizzare networking problems. :
Date: Wednesday, March 20, 1996 12:29AM
Precedence: bulk
Howdy. I have been experiencing a very odd network related
problem and was hoping you might have the time to help. I'm also going to
cc: this to the linux-net mailing list in hopes that someone might have
something to offer there as well. :) Here is the description:
I originally ran 1.2.13 when I first set up this Linux box.
Unfortunately, I found that if I didn't generate network traffic every so
often, say every 15 minutes or so, that I would no longer be able to
access the machine remotely (An ARP problem of some kind?). Any service
that I tried to use be it web services, ftp, telnet, or sendmail would
respond with "Connection refused." If I went to the console and telnetted
out I could then telnet back in without problems. There were a couple of
times when I pinged the machine from offsite and it would return two echos
instead of one.
I figured that there might be something wrong with the kernel, so
I thought I'd upgrade. I tried running 1.3.57, a damn stable kernel, and
see if it would help. It did seem to. I can now telnet in without
problems as long as I am not on the same physical cable as the machine.
If I am the same segment, I still receive the same messages as above.
However, if I try again and again (especially from one of the suns on the
segment) to connect to port 80 I will eventually get a connection. At
that point I can connect without problems from any machine on that
segment to that service.
A co-worker of mine also runs Linux. He does not seem to
experience the problems that I do. We run on the exact same hardware.
The only difference that I can figure is that he has 10Base-T, and I use
the AUI port with an adapter to Coax on my ether card. We both have
3Com 3C579's. I've tried booting using his kernels off of disk and I
have exactly the same problems. Any thoughts on how I might diagnose
this further? Thanks.
--Chris
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Christopher Blizzard | "The truth knocks on the door and you say
blizzard@odin.nyser.net | 'Go away. I'm looking for the truth,' and
| so it goes away." --Robert Pirsig
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