Adding additional info for posterity, and in case anyone else runs across this...
On Wed, Dec 7, 2011 at 12:28 PM, Benjamin Franz jfranz@freerun.com wrote:
On 12/7/2011 10:03 AM, Matt Garman wrote:
Hi,
[...]
What I basically need to be able to do is this: route add -host h1 gw g1 metric 0 route add -host h1 gw g2 metric 10
Notice that everything is the same except the gateway and metric. I could put this in /etc/rc.local, but was wondering if there's a cleaner way to do it in e.g. the network-scripts directory.
If you create files in the /etc/sysconfig/network-scripts directory named according to the scheme
route-eth0 route-eth1 route-eth2
it will execute each line in the files as
/sbin/ip route add <line>
when each interface is brought up.
Look in the /etc/sysconfig/network-scripts/ifup-routes script for all the gory details and features.
I actually did just that---looked at the ifup-routes script. The thing that threw me off is the comments about "older format" versus "new format". I probably read into the comments too much, but I thought to myself, "I should probably use the new format, as they might some day deprecate the old format."
But anyway, the "older format" is what I need. With the older format, it's exactly what you said above: each line corresponds to running "ip route add <line>". So what I added were lines in this format:
<addr>/<mask> via <gateway> dev <device> metric <N>
A contrived example might be:
10.25.77.0/24 via 192.168.1.1 dev eth0 metric 5
The "new format" is where each group of three lines corresponds to a route. You have the ADDRESSxx=, NETMASKxx=, GATEWAYxx= lines. Clearly this is less flexible, particularly if you need to set a metric like me. :)
Anyway, hopefully that's useful for anyone in a similar situation!
-Matt