Subject: Re: network interfaces(my fault)
To: Unix Wizard <firstname.lastname@example.org>
From: Frederick Bruckman <email@example.com>
Date: 03/11/2001 15:10:57
> > You can't have two interfaces with the same address! In fact, you
> > can't even have two interfaces on the same machine on the same
> > network. How would it know which interface to send a packet out on?
> > It's a bug that you were even be able to do that!
> > Maybe if you tell us exactly what you're trying to accomplish (dhcp
> > client and gateway for a cable modem?), folks here could help you
> > design a network that makes sense.
On Sun, 11 Mar 2001, Unix Wizard wrote:
> Sorry Folks,
> I typed it by hand output of the commands, duh?! Mistyped IP one ne2 in my
> e-mail.Accept my appologies..
> Okay correction
> IP for ne2 192.168.0.4
> IP for ne3 192.168.0.5
There's your problem! They're both on network 192.168.0/24, so how
can the router have both in the routing table, and if it did, how
would it know which one to use?
> It's going to be a GATEWAY, but for simplicity let's look at it as a regular
> workstation with 2 NIC's
> Connected to a switch. While ne2 is working, and ne3 is not.
Assuming that the external address is imposed by your cable modem,
just pick a different network for your internal interface (say,
192.168.100). "defaultroute" as defined in /etc/rc.conf or /etc/mygate
should remain on your external interface. By the way, if you didn't
know this already, all you have to do to enable the change is execute
By the way, this discussion would be easier for others to follow if
you would quote judiciously, preserve the attributions, and have your
response _follow_ the text your responding to. [Top posting is for
MCSEE's and other mental defectives. :-)]