On Thursday 25 May 2006 08:35, Joshua Gimer wrote: > There isn't going to be a difference to your routing. Whatever gateway > comes first in your routing table is going to be used first. You can add > the one that you want to use as the primary gateway in ifcfg-ethx of your > first interface. Then you should see two entries in your routing table > (along with the usual entries and information): > > Destination > Gateway Genmask > Interface > 0.0.0.0 (The address of your first gateway) > 0.0.0.0 eth0 > 0.0.0.0 (The address of your second gateway) > 0.0.0.0 > eth1 > > On 5/25/06, Tom Brown <tom at ng23.net> wrote: > > Hi > > > > On a multihomed box how can i set different gateways for each NIC? > > Setting them in the ifcfg-ethx does not seem to make any difference to > > the routing? > > > > thanks > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos Hi, I've done some work on this a few month ago at my other job, and basically the solution lies in iproute2 commands. First you need to create a rule and assign that traffic to a different table than the main table. Then you can easily add a default route to that new table. so it would look like this ip rule add from 192.168.1.0/24 table X check /etc/iproute2/rt_tables if you want to make aliases like eth1 eth2 eth3 it will get easier if you automate this thing :) After that you set a default route to this new table. ip route add default via 1.2.3.4 table X Once you have this done and working it's a matter of getting your dhclient of pppoe to do this for you as soon as ip changes. for pppoe create a /etc/ppp/ip-up.local script. for dhclient stuff you need to look in /sbin/dhclient-script script to find out how it will execute what's in /etc/dhclient-enter-hooks or /etc/dhclient-exit-hooks It's quite useful and for me it did turn out to work nicely. I just had to create some sort of master script that would take decisions on what's going on with my gateways :) It was pretty fun to work on that. I hope this helps you out. Later, Charles