[CentOS] Multiple Internet facing Nics - Gateway issue

Thu Jul 2 13:06:53 UTC 2009
Chan Chung Hang Christopher <christopher.chan at bradbury.edu.hk>

Doug Coats wrote:
> I am ecstatically confused.
>
> After I entered the last two commands my routing is working the way that I
> need it to.
>
> ip rule add from 173.11.51.46 table Cable
> ip rule add from 67.152.166.2 table T1
>
> The problem is I don't know which actual commands worked.  I had just
> rebooted.  The other ip commands were all in the rc.local file so they all
> ran.
>
> Why did the above commands make the Cable and T1 rules show up in the rules
> list but the following two did not?
>   
The following too are not ip rules. They are ip routing table entries. 
They will show up if you run 'ip route list table Cable'

> ip route add 173.11.51.44/30 dev eth2 src 173.11.51.45 table Cable
> ip route add 67.152.166.0/27 dev eth3 src 67.152.166.2 table T1
> Do I need all of the commands?  So that what is in rc.local looks like this?
>   

Take a look at the ones I posted...they are taken from rc.local since I 
have not taken to effort to integrate them elsewhere per interface.

> ip rule add from 173.11.51.46 table Cable
> ip route add 173.11.51.44/30 dev eth2 src 173.11.51.45 table Cable
> ip route add default via 173.11.51.45 table Cable
> ip route add 173.11.51.44/30 dev eth2 src 173.11.51.45
> ip route add default via 173.11.51.46
> ip rule add from 173.11.51.45 to default lookup Cable
> ip rule add from 67.152.166.2 table T1
> ip route add 67.152.166.0/27 dev eth3 src 67.152.166.2 table T1
> ip route add default via 67.152.166.2 table T1
> ip route add 67.152.166.0/27 dev eth3 src 67.152.166.2
> ip rule add from 67.152.166.2 to default lookup T1
> ip route flush cache
>
>   
I find it interesting that you have ip rule commands before the relevant 
ip route commands for the custom routing table...