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Nick 02-01-2012 06:03 PM

ip route and nexthop: the "CentOS" way

I'm wanting to configure a CentOS 6 server to have a fall-back default route via
a second network interface.


- eth0 with on subnet gateway
- eth1 with on subnet gateway

Where eth0's network is a "back door" to the internet, and eth1's is the "front
door", I believe I can configure the routing table manually like this:

ip route default scope global
nexthop via dev eth1 weight 1
nexthop via dev eth0 weight 2

However, I've re-read the RHEL6 documents for configuring static routes here:

This kind of thing doesn't seem to fit into the scheme of
/etc/sysconfig/network-scripts/route-eth? described there, since the route isn't
"for" any single interface. Is there a "RHEL/CentOS" way to do this, or do I
need to resort to some sort of script containing the above ip route command
inserted somewhere?

And how do I stop CentOS from trying to pick its own default gateway settings
(since /etc/sysconfig/network likely won't have a GATEWAY parameter)?



ps. Hints about this obtained from
CentOS mailing list

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