Date: Sun, 10 Oct 1999 17:32:15 -0600 From: Wes Peters <wes@softweyr.com> To: Mohit Aron <aron@cs.rice.edu> Cc: freebsd-net@FreeBSD.ORG, justin@apple.com, Alan Cox <alc@cs.rice.edu>, wollman@khavrinen.lcs.mit.edu Subject: Re: arp errors on machines with two interfaces Message-ID: <380121FF.CB92828A@softweyr.com> References: <199910091650.LAA08261@cs.rice.edu>
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Mohit Aron wrote:
>
> > Garrett is correct, and sarcasm doesn't help. You can't have more
> > than one interface on a given wire, with the same subnet address,
> > using IP. Them's the protocol rules.
> >
>
> Actually I am using different subnet addresses on the two interfaces. One is
> 128.42.3.77 and the other is 192.168.3.77. There are other machines in the dept
> running Solaris and other OS's that are connected in similar fashions.
> However, the Ethernet is switched and any broadcast by anyone is going to be
> seen by all interfaces connected to it.
Get a switch that supports Layer 3 VLANs, then the broadcasts from the 192.168
network will not show up on the 128.42 network and vice versa.
> I don't have control over the hardware. But here's a possibility - wouldn't
> it be better if this error message generation in FreeBSD is turned off if
> the packet is an arp broadcast ? Like I showed in my earlier mail, the problem
> only happens due to arp broadcasts.
Normally you would want to be warned about such things, they are usually a
sign of a network misconfiguration. Perhaps a sysctl to turn off these arp
warnings would meet your needs?
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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