Open Stack

Dear all,
i've used this doc for installation 
http://docs.openstack.org/trunk/install-guide/install/apt/content/
and used 3 node architecture

in some vm it will be use for this schema :
vm1 have 2 interface that will connect to 2 external net,
eth0 will connect to externalnet
eth1 will connect to externalnet2

so it will be like this
localnet is network in it's tenant

vm1----eth0----localnet ----- externalnet------Internet
vm1----eth1---localnet ------ externalnet1 ----- Internet

or

vm1----eth0----localnet ----- externalnet------Internet
vm1----eth1---localnet 1------ externalnet1 ----- Internet

How can i get this work? give me some advice please.

thanks


-- 
Regards,
Mahardhika Gilang