From owner-freebsd-net Thu May 11 15: 3:49 2000 Delivered-To: freebsd-net@freebsd.org Received: from teaausdmz001.telusa.com (teaausdmz001.telusa.com [208.218.238.10]) by hub.freebsd.org (Postfix) with ESMTP id 8D09F37B853 for ; Thu, 11 May 2000 15:03:30 -0700 (PDT) (envelope-from EGravel@taz.telusa.com) Received: from teaaushub001.telusa.com ([172.17.40.252]) by teaausdmz001.telusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-0U10L2S100) with ESMTP id com for ; Thu, 11 May 2000 16:55:42 -0500 Received: from teaaus0030.telusa.com ([172.17.40.130]) by teaaushub001.telusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-57493U100L2S100V35) with ESMTP id com for ; Thu, 11 May 2000 17:03:31 -0500 Received: by teaaus0030.telusa.com with Internet Mail Service (5.5.2650.21) id ; Thu, 11 May 2000 17:03:24 -0500 Message-ID: <6BFFC6F3FB6AD211A9D800A0C99B3E6F014A4123@TEAPHX0031> From: "TAZ Gravel, Emmanuel" To: "'freebsd-net@freebsd.org'" Subject: Weirdness in small network Date: Thu, 11 May 2000 17:03:23 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01BFBB94.B9A95720" Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01BFBB94.B9A95720 Content-Type: text/plain I have a small network of about 20 machines, running many Unix-like OS'es of different age (some as old as over 10 years, discontinued). Something strange happened recently: two of the machines can't talk to each other, but can talk to the rest of the network. The network is primarily coax (10b2) but has a hub here and there, to add machines that have 10bT interfaces. All machines in the same network address space, and all have same netmask, so routing and other networking issues aren't a problem. Pinging doesn't work between each other (host unreachable) but can ping anywhere else in the network. Both machines are in the middle of the chain so hardware problems aren't an issue. The only truly odd thing I found was looking at the ARP cache. For one of the machines, it does have the proper MAC address associated with the IP address. This is a machine with the 10 year old OS. The other machine only shows (incomplete) instead of the proper info. I tried hardcoding the values in there but it didn't produce any results. I know no firewalling is in place. Right now I'm stuck and don't know where else to look. Anyone have any idea what this could be? Please also forward directly to me since I can't subscribe to mailing lists here. Thanks, Emmanuel Gravel ------_=_NextPart_001_01BFBB94.B9A95720 Content-Type: text/html Weirdness in small network

I have a small network of about 20 machines, running many Unix-like
OS'es of different age (some as old as over 10 years, discontinued).
Something strange happened recently: two of the machines can't
talk to each other, but can talk to the rest of the network. The network
is primarily coax (10b2) but has a hub here and there, to add machines
that have 10bT interfaces. All machines in the same network address
space, and all have same netmask, so routing and other networking
issues aren't a problem. Pinging doesn't work between each other
(host unreachable) but can ping anywhere else in the network. Both
machines are in the middle of the chain so hardware problems aren't
an issue.

The only truly odd thing I found was looking at the ARP cache. For
one of the machines, it does have the proper MAC address associated
with the IP address. This is a machine with the 10 year old OS. The
other machine only shows (incomplete) instead of the proper info. I
tried hardcoding the values in there but it didn't produce any results.
I know no firewalling is in place. Right now I'm stuck and don't know
where else to look.

Anyone have any idea what this could be?

Please also forward directly to me since I can't subscribe to mailing
lists here.

Thanks,

Emmanuel Gravel

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