Isn't this more to do with default routing than Asterisk?
Asterisk leaves the actual movement of the packets up to the host OS
(just like every other network application).
Try this
http://kindlund.wordpress.com/2007/11/19/configuring-multiple-default-routes-in-linux/
Mark
On 05/12/2010 05:4
Backround:
I have a question about some asterisk /astlinux redundcancy design and
solutions.
My Soekris box is on a private network 192.168.0.X with a deault gateway of
192.168.0.1 which is my primary ISP router doing NAT.
I have a second ISP with a router doing NAT and the gateway to that gatewa