Setting up second nic for local lan backup

[Matt Iavarone]

On Wed, May 4, 2011 at 8:40 PM, Steven Buehler <steve at ibushost.com> wrote:
> I have a Redhat 5.2 box that I am trying to setup in internal lan on for
> backing up to a local machine since my Provider charges for any bandwith
> going over the external IP's even though it comes right back to another
> server of my network.  Below is the setup for the 2 nics that I tried, but
> when I try to start the second nic with "ifup eth1", it looses the route for
> the first nic so my external IP will no longer work unless I restart it
> which then takes the route out of the second nic.  What am I missing?  I
> hope someone can help me with this.  BTW, the second nic is connected to an
> internal router.  I am assuming that I can't just use a switch instead any
> easier.
>
>
>
> # cat ifcfg-eth0
>
> DEVICE=eth0
>
> BOOTPROTO=none
>
> HWADDR=00:1c:23:d5:be:02
>
> IPADDR=101.110.67.100
>
> NETMASK=255.255.255.0
>
> GATEWAY=101.110.67.1
>
> ONBOOT=yes
>
> TYPE=Ethernet
>
> PEERDNS=no
>
>
>
> # cat ifcfg-eth1
>
> BOOTPROTO=static
>
> DEVICE=eth1
>
> ONBOOT=no
>
> IPADDR=192.168.2.151
>
> GATEWAY=192.168.2.1
>
> NETMASK=255.255.255.0
>
> HWADDR=00:1c:23:d5:be:04
>
> PEERDNS=no
>
> TYPE=Ethernet
>
>
>
> Thanks
>
>
>
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You need to remove the gateway from the second NIC and use iproute2 to
add a second default route for eth1.

-Matt