Two default gateways.

[ajmcello]

I have two network cards, eth0, and eth1. Each interface has an IP address with the option of having a default gateway, but at present only eth0's gateway is set up as the default route.

I have applications that can launch using -iface ethX. They work fine when using eth0, but not eth1, unless I remove my default route for eth0 and add eth1 as the default route or add a static route to that interface.

My question is this: How can I make it so that I can have two default routes, with eth1's default route only being used when packets flow in or out of eth1?

Is this possible?

Thanks in advance!

[Irithori]

There is -by definition- only one default gateway.

I have no idea about your setup and network layout, but in the simplest case you could try to enable IP forwarding.

[Bemk]

I have once seen a network with 2 gateways that shared the loads, but I don't know if that's what you're talking about.

Either way, I don't know yet how to set these things up. I don't think it was an easy project, as the developers told me, but they weren't linux users anyway.

I would be more than happy to try and find the developers, and ask them, if necessary.

[kerim]

You can do with linux advanced routing
google lartc . You will see the howto. This is your solution.I made myself so many kind of multi gateway router with linux advanced routing.You can do.

lartc.org/

[vel_murugan]

you can do by Iproute on etho of gateway & ip