Just to make sure I understand what you want:

1. eth1 has an IP Address of 172.30.0.3
2. All communication to 172.30.0.0/16 goes through the 172.30.0.1 gateway.

If this is correct, I think the setup you want is:

1. /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
BOOTPROTO=static
IPADDR=172.30.0.3
NETMASK=255.255.255.255
ONBOOT=yes

2. /etc/sysconfig/network-scripts/route-eth1
ADDRESS0=172.30.0.1
NETMASK0=255.255.255.255
ADDRESS1=172.30.0.0
NETMASK1=255.255.0.0
GATEWAY1=172.30.0.1

The NETMASK=255.255.255.255 in ifcfg-eth1 will prevent a route from being
created and the route-eth1 settings establish both the route to 172.30.0.1
and the route to 172.30.0.0/16 via the 172.30.0.1 gateway.

Thanks,

Doug

On Sat, 01 Mar 2008, Ahmed Kamal wrote:

> oops, the eth1 IP/mask is 172.30.0.3/16.
>
> Also let me mention the needed configuration
> - eth0 IP 196.x.x.3
> - System default gateway is 196.x.x.1 and is connected to eth0
> - eth1 IP 172.30.0.3/16. This interface needs to have a static route for
> routing 172.30.0.0/16 through 172.30.0.1 (a router) and not "directly"
>
> Any pointers on what "GATEWAY"s need to go into ifcfg-eth0, ifcfg-eth1 and
> /etc/sysconfig/network ? to get the described effect ?
>
> Regards
>
> On Sat, Mar 1, 2008 at 6:54 PM, Tom Sightler <ttsig@tuxyturvy.com> wrote:
>
> > Ahmed Kamal wrote:
> > > Hi List,
> > > I'm fighting with a small problem. My eth1 NIC has IP 172.30.0.0/16,
> > > whenever the interface is started, an automatic route is added
> > > 172.30.0.0   0.0.0.0   255.255.0.0     U     0      0    0 eth1
> > > The thing is, this would generally be right for most people, but
> > > not for me.
> >
> > Actually, it probably wouldn't be right for anybody.  If you've really
> > assigned your eth1 NIC the IP address of 172.30.0.0/16 then you're
> > likely in error.  That would be the network address.  The first usable
> > address in that network is 172.30.0.1.
> >
> > > The question is how do I get rid of that automatically added route,
> > > and add mine! I need to do this the redhat way (i.e not rc.local).
> > > Any help is highly appreciated :)
> > > Regards
> >
> > Assign the interface an actual valid host address, not a network
> > address.  If you don't understand IP addressing then look at this link:
> >
> > http://jodies.de/ipcalc?host=172.30.0.0&mask1=16&mask2=
> >
> > Pay particular attention to the Hostmin and Hostmax lines.  Those are
> > the valid IP addresses that can be used for an interface.  Notice that
> > 172.30.0.0 is not in the range.
> >
> > Later,
> > Tom
> >
> >
> > _______________________________________________
> > rhelv5-list mailing list
> > rhelv5-list@redhat.com
> > https://www.redhat.com/mailman/listinfo/rhelv5-list
> >

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