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Date:      Wed, 19 May 1999 23:28:34 -0400 (EDT)
From:      "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com>
To:        dhedge@wa.yokogawa.com.au (David Hedge)
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: packet duplication
Message-ID:  <199905200328.XAA14187@cc942873-a.ewndsr1.nj.home.com>
In-Reply-To: <199905200041.KAA19848@wa.yokogawa.com.au> from David Hedge at "May 20, 99 08:49:57 am"

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David Hedge wrote,
> I have a network with all hosts on the same subnet, with netmask 
> 255.255.0.0.

Uh, oh.

> Most are running FreeBSD, a couple are running HP-UX.
> When I ping, I get duplicate packets, and traceroute indicates a hop via 
> another host.

Is this always the same host? Do you get duplicate packets when you
ping from any machine? On both OSs?

> No default gateways are defined, though one was but was 
> removed from the configuration.
> "netstat -r" does not show the route (nor should it when it is on the same 
> subnet).

It sure should show the local route. Could you show us the 'netstat
-rn,' 'ifconfig -a,' and 'traceroute' output from an effected machine?
And again, any pattern to which machines are doing this?

> 22 machines are running FreeBSD 2.1.0, 2 are running FreeBSD 2.2.2, and 

Is there a good reason these have not been upgraded? (Although I
cannot say it has anything to do with the problem.)

> 2 are running HP-UX 10.20.
> What can I do to stop the packet duplication??? 

Can't quite say yet.
-- 
Crist J. Clark                           cjclark@home.com


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