*BSD News Article 83375


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From: rnestor@ti.com (Bob Nestor)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Two devices with same IP
Date: 21 Nov 1996 14:36:29 GMT
Organization: Systems Group, Texas Instruments
Lines: 34
Message-ID: <571pde$mp8@sf18.dseg.ti.com>
References: <56ltqk$nhv@csugrad.cs.vt.edu> <56lvvc$62f$1@gail.ripco.com> <32920988.63E7@www.play-hookey.com>
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In article <32920988.63E7@www.play-hookey.com>, kbigelow@www.play-hookey.com 
says...
>
>Brian Somers wrote:
>> 
>> In article <328EF58B.16E4@www.play-hookey.com>,
>>         Ken Bigelow <kbigelow@www.play-hookey.com> writes:
>> : I have no problem with that. My gateway/mailserver/Webserver/etc. is
>> : running FreeBSD 2.1R. It uses a 33.6k modem for connection to my ISP,
>> : and an NE2100 clone (lnc0) for my local network. Both ports have the
>> : same IP address, and work fine with no trouble. Since they are both
>> : attached to the same box, neither my ISP nor my local network (nor
>> : anyone else) have any trouble indentifying this box as a unique node.

>> 
>> Of course this assumes that all but one of the interfaces have a netmask
>> of 0xffffffff :)
>> 
>
>Sorry, brian, but no. From my /etc/sysconfig file:
>
>
>network_interfaces="cuaa1 lnc0 lo0"
>ifconfig_cuaa1="inet 206.161.179.129  netmask 255.255.255.224"
>ifconfig_lnc0="inet 206.161.179.129  netmask 255.255.255.224  mtu 1006"
>ifconfig_lo0="inet localhost"
>

>Seems to still be working fine.

One should never assume that software (or a system configuration) is bug-free 
due to the absence of observable errors.  It might prove interesting to do 
some low-level traces and see what's really happening.