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2002 May 03 09:15

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Re: [vox-tech] Multiple IPs on one system
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Re: [vox-tech] Multiple IPs on one system



It's IP aliasing.  It will be eth0 and eth0:1
A little perl for a loop, but really what you want is the ifconfig line.
I don't think you need the route line because it already knows how to route 
the subnet.

#!/usr/bin/perl -w
use strict;
my($n,$ip) = (1,3);
while($ip <= 102){
        system("ifconfig eth0:$n 24.47.198.$ip broadcast 24.47.198.255 
netmask 255.255.255.0");
        system("route add -host 24.47.198.$ip eth0:$n");
        $n++; $ip++;
}

The Mini-HOWTO:
http://www.tldp.org/HOWTO/mini/IP-Alias/

Hope that helps,
-Tom
tlburnett@ucdavis.edu

On Friday 03 May 2002 08:48, you wrote:
> Here's a challenging question (for me at least),
>
> I want to have server with two IP's on the same
> subnet. So far, my attemps with two NIC's don't work.
> To get any kind of connectivity, each NIC needs to
> talk to a differnt subnet.
>
> What I want to do it this:
>
> eth0 - dhcp to get my name isp's name servers from the
> firewall/dhcp server. No server service requests
> (Samba, NFS, or FTP) allowed in.
>
> eth1 - in the same subnet, but a fixed address outside
> the dhcp range with server services running against
> it.
>
> The idea was to set up a mirror of Redhat's updates
> files and update my systems locally with out having to
> pay for multiple RH network memberships. I plan to
> keep three to four systems updated this way. Each will
> have a different configuration (Server, laptop,
> workstation, etc.).
>
> Questions:
>
> 1. Is this possible?
>
> 2. Would it be easier to just learn how to use
> iptables?
>
> Thanks in advance,
> Marc
>
>
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