Multiple default routes - sorting by interface priority

Hi,

I want to have my routes (obtained by the DHCP client) to be ordered so
that it will use eth0 (Gigabit Ethernet) whenever possible, eth1 (WiFi)
otherwise and finally ppp0 (GPRS) if all else fails.

This seems to be working fine as long as I manually keep the routes in the
correct order, but this is tricky when interfaces come and go all the time.

So, what would be a proper solution?

On 2006-03-03, Lasse Kärkkäinen / Tronic <tronic+(E-Mail Removed)> wrote:
> So, what would be a proper solution?

Using OSPFD to recalculate the routing 'on the fly'.
Davide

--
Writing Solid Code. I still think buying a book of that title from
Microsoft Press would be like buying a handbook for humanitarians from
Pol Pot. --Paul Tomblin

=?UTF-8?B?TGFzc2UgS8Okcmtrw6RpbmVuIC8gVHJvbmlj?=
<tronic+(E-Mail Removed)> écrivait news:du84u6$cjg$(E-Mail Removed):

> Hi,
>
> I want to have my routes (obtained by the DHCP client) to be ordered
> so that it will use eth0 (Gigabit Ethernet) whenever possible, eth1
> (WiFi) otherwise and finally ppp0 (GPRS) if all else fails.
>
> This seems to be working fine as long as I manually keep the routes in
> the correct order, but this is tricky when interfaces come and go all
> the time.
>
> So, what would be a proper solution?

If you have control on the other network (partners on the other side of
each access point), you may use a dynalic routing protocol like RIP, OSPF
or BGP (using the Quagga daemon for exemple).

You may also try the linux ip route 2 'equalize' feature, that set many
root to a destination (default or specific) with weight for each one.

And last, you may write a script to check (ping, ...) link status and
add/remove route automaticaly.


Regards